1
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Gu Y, Wang W, Wang S, Zhou J, Tian B, Zhang J. A Bifunctional Luminescent Whitening and Sensing Material Based on Photoluminescence and Mechanoluminescence. Inorg Chem 2024; 63:2577-2585. [PMID: 38244205 DOI: 10.1021/acs.inorgchem.3c03815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2024]
Abstract
A bifunctional luminescent whitening and luminescent sensing composite material, BaMgAl12O17:Eu2+/polydimethylsiloxane (BAM/PDMS), that utilizes natural sunlight and mechanical energy is presented. By increasing the Eu2+ content, the photoluminescence (PL) excitation spectrum of the material shows a maximum redshift of 23 nm due to 5d level splitting of Eu2+, resulting in more spectral overlap with sunlight and an excellent PL whitening effect. Meanwhile, the self-recoverable mechanoluminescence (ML) of the material can be easily excited under mechanical stimuli due to contact electrification, exhibiting a unique stress sensing effect. Based on the unique features of PL whitening and ML sensing, the material is applied to model cars through a spray process, and the results demonstrate that the bifunctional BAM/PDMS material shows promising applications in automobile decoration.
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Affiliation(s)
- Yan Gu
- National & Local Joint Engineering Laboratory for Optical Conversion Materials and Technology, Lanzhou University, Lanzhou 730000, P. R. China
| | - Wenxiang Wang
- National & Local Joint Engineering Laboratory for Optical Conversion Materials and Technology, Lanzhou University, Lanzhou 730000, P. R. China
| | - Shanwen Wang
- National & Local Joint Engineering Laboratory for Optical Conversion Materials and Technology, Lanzhou University, Lanzhou 730000, P. R. China
| | - Jinyu Zhou
- National & Local Joint Engineering Laboratory for Optical Conversion Materials and Technology, Lanzhou University, Lanzhou 730000, P. R. China
| | - Birong Tian
- National & Local Joint Engineering Laboratory for Optical Conversion Materials and Technology, Lanzhou University, Lanzhou 730000, P. R. China
| | - Jiachi Zhang
- National & Local Joint Engineering Laboratory for Optical Conversion Materials and Technology, Lanzhou University, Lanzhou 730000, P. R. China
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2
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Hu J, Iwamoto M, Chen X. A Review of Contact Electrification at Diversified Interfaces and Related Applications on Triboelectric Nanogenerator. NANO-MICRO LETTERS 2023; 16:7. [PMID: 37930592 PMCID: PMC10628068 DOI: 10.1007/s40820-023-01238-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 10/06/2023] [Indexed: 11/07/2023]
Abstract
The triboelectric nanogenerator (TENG) can effectively collect energy based on contact electrification (CE) at diverse interfaces, including solid-solid, liquid-solid, liquid-liquid, gas-solid, and gas-liquid. This enables energy harvesting from sources such as water, wind, and sound. In this review, we provide an overview of the coexistence of electron and ion transfer in the CE process. We elucidate the diverse dominant mechanisms observed at different interfaces and emphasize the interconnectedness and complementary nature of interface studies. The review also offers a comprehensive summary of the factors influencing charge transfer and the advancements in interfacial modification techniques. Additionally, we highlight the wide range of applications stemming from the distinctive characteristics of charge transfer at various interfaces. Finally, this review elucidates the future opportunities and challenges that interface CE may encounter. We anticipate that this review can offer valuable insights for future research on interface CE and facilitate the continued development and industrialization of TENG.
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Affiliation(s)
- Jun Hu
- CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, People's Republic of China
- School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Mitsumasa Iwamoto
- Department of Physical Electronics, Tokyo Institute of Technology, 2-12-1 S3-33 O-Okayama, Meguro-Ku, Tokyo, 152-8552, Japan.
| | - Xiangyu Chen
- CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, People's Republic of China.
- School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
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3
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Middleton J, Scott AJ, Storey R, Marucci M, Ghadiri M. Prediction of the Effective Work Function of Aspirin and Paracetamol Crystals by Density Functional Theory-A First-Principles Study. CRYSTAL GROWTH & DESIGN 2023; 23:6308-6317. [PMID: 37692333 PMCID: PMC10485818 DOI: 10.1021/acs.cgd.3c00218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 07/10/2023] [Indexed: 09/12/2023]
Abstract
Crystals of active pharmaceutical ingredients (API) are prone to triboelectric charging due to their dielectric nature. This characteristic, coupled with their typically low density and often large aspect ratio, poses significant challenges in the manufacturing process. The pharmaceutical industry frequently encounters issues during the secondary processing of APIs, such as particle adhesion to walls, clump formation, unreliable flow, and the need for careful handling to mitigate the risk of fire and explosions. These challenges are further intensified by the limited availability of powder quantities for testing, particularly in the early stages of drug development. Therefore, it is highly desirable to develop predictive tools that can assess the triboelectric propensity of APIs. In this study, Density Functional Theory calculations are employed to predict the effective work function of different facets of aspirin and paracetamol crystals, both in a vacuum and in the presence of water molecules on their surfaces. The calculations reveal significant variations in the work function across different facets and materials. Moreover, the adsorption of water molecules induces a shift in the work function. These findings underscore the considerable impact of distinct surface terminations and the presence of molecular water on the calculated effective work function of pharmaceuticals. Consequently, this approach offers a valuable predictive tool for determining the triboelectric propensity of APIs.
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Affiliation(s)
- James
R. Middleton
- School
of Chemical and Process Engineering, University
of Leeds, Leeds LS2 9JT, United
Kingdom
| | - Andrew J. Scott
- School
of Chemical and Process Engineering, University
of Leeds, Leeds LS2 9JT, United
Kingdom
| | - Richard Storey
- New
Modalities Product Development, Pharmaceutical Technology & Development,
Operations, AstraZeneca, Macclesfield SK10 2NA, United Kingdom
| | - Mariagrazia Marucci
- Oral
Product Development, Pharmaceutical Technology & Development,
Operations, AstraZeneca, Gothenburg 413 27, Sweden
| | - Mojtaba Ghadiri
- School
of Chemical and Process Engineering, University
of Leeds, Leeds LS2 9JT, United
Kingdom
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4
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Sun S, Liu Z, Zheng J, Cheng Q, Tan Y, Huang S, Zhang L, Wang Y, Zhou H. A Directional Chitosan Sound Sensor Based on Piezoelectric-Triboelectric Sensing. ACS Macro Lett 2023; 12:577-582. [PMID: 37053569 DOI: 10.1021/acsmacrolett.3c00139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/15/2023]
Abstract
Herein, we have constructed a directional sound sensor based on an anisotropic chitosan aerogel. Because of the lamellar porous structure, this chitosan aerogel exhibits a distinct anisotropic behavior, featuring the compressive stress along the direction of the parallel laminate structure, being approximately 2.6 times that in the orthogonal direction. Simultaneously, the chitosan aerogel is used as a directional sound-sensing material, which exhibits excellent acoustic-electric conversion performance with a marked difference in the direction perpendicular to the laminate structure than in the parallel direction. The CSANG has an optimum electrical output of 66 V and 9.2 μA under a sound stimulation of 150 Hz and 120 dB in the orthogonal direction of the laminate structure. Therefore, this directional chitosan sound sensor with excellent biocompatibility and sound sensitivity demonstrates promising application potential in the field of intelligent sensing and artificial cochlea.
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Affiliation(s)
- Shuang Sun
- State Key Laboratory of Material Processing and Die & Mold Technology, Huazhong University of Science & Technology, Wuhan 430074, P. R. China
| | - Zijie Liu
- State Key Laboratory of Material Processing and Die & Mold Technology, Huazhong University of Science & Technology, Wuhan 430074, P. R. China
| | - Jiaqi Zheng
- State Key Laboratory of Material Processing and Die & Mold Technology, Huazhong University of Science & Technology, Wuhan 430074, P. R. China
| | - Qikuan Cheng
- State Key Laboratory of Material Processing and Die & Mold Technology, Huazhong University of Science & Technology, Wuhan 430074, P. R. China
| | - Yanlong Tan
- Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Siluo Huang
- Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Lu Zhang
- State Key Laboratory of Material Processing and Die & Mold Technology, Huazhong University of Science & Technology, Wuhan 430074, P. R. China
| | - Yunming Wang
- State Key Laboratory of Material Processing and Die & Mold Technology, Huazhong University of Science & Technology, Wuhan 430074, P. R. China
| | - Huamin Zhou
- State Key Laboratory of Material Processing and Die & Mold Technology, Huazhong University of Science & Technology, Wuhan 430074, P. R. China
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5
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Zhou Q, Takita R, Ikuno T. Improving the Performance of a Triboelectric Nanogenerator by Using an Asymmetric TiO 2/PDMS Composite Layer. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:832. [PMID: 36903710 PMCID: PMC10005343 DOI: 10.3390/nano13050832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 02/14/2023] [Accepted: 02/21/2023] [Indexed: 06/18/2023]
Abstract
To improve the output power of the polydimethylsiloxane (PDMS)-based triboelectric nanogenerators (TENGs), we fabricated an asymmetric TiO2/PDMS composite film in which a pure PDMS thin film was deposited as a capping layer on a TiO2 nanoparticles (NPs)-embedded PDMS composite film. Although in the absence of the capping layer, the output power decreased when the content of TiO2 NPs exceeded a certain value, the asymmetric TiO2/PDMS composite films showed that the output power increased with increasing content. The maximum output power density was approximately 0.28 W/m2 at a TiO2 content of 20 vol.%. The capping layer could be responsible not only for maintaining the high dielectric constant of the composite film but also for suppressing interfacial recombination. To further improve the output power, we applied a corona discharge treatment to the asymmetric film and measured the output power at a measurement frequency of 5 Hz. The maximum output power density was approximately 78 W/m2. The idea of the asymmetric geometry of the composite film should be applicable to various combinations of materials for TENGs.
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6
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Lin MF, Chang PY, Lee CH, Wu XX, Jeng RJ, Chen CP. Biowaste Eggshell Membranes for Bio-triboelectric Nanogenerators and Smart Sensors. ACS OMEGA 2023; 8:6699-6707. [PMID: 36844511 PMCID: PMC9948195 DOI: 10.1021/acsomega.2c07292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
In this study, we used a simple and cost-effective method to fabricate triboelectric nanogenerators (TENGs) based on biowaste eggshell membranes (EMs). We prepared stretchable electrodes with various types of EMs (hen, duck, goose, and ostrich) and employed them as positive friction materials for bio-TENGs. A comparison of the electrical properties of the hen, duck, goose, and ostrich EMs revealed that the output voltage of the ostrich EM could reach up to 300 V, due to its abundant functional groups, natural fiber structure, high surface roughness, high surface charge, and high dielectric constant. The output power of the resulting device reached 0.18 mW, sufficient to power 250 red light-emitting diodes simultaneously, as well as a digital watch. This device also displayed good durability when subjected to 9000 cycles at 30 N at a frequency of 3 Hz. Furthermore, we designed an ostrich EM-TENG as a smart sensor for the detection of body motion, including leg movement and the pressing of different numbers of fingers.
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Affiliation(s)
- Meng-Fang Lin
- Department
of Materials Engineering, Ming Chi University
of Technology, New Taipei
City 24301, Taiwan
- Center
for Plasma and Thin Film Technologies, Ming
Chi University of Technology, New
Taipei City 24301, Taiwan
- Research
Center for Intelligent Medical Devices, Ming Chi University of Technology, New Taipei City 24301, Taiwan
| | - Po-Yen Chang
- Department
of Materials Engineering, Ming Chi University
of Technology, New Taipei
City 24301, Taiwan
- Center
for Plasma and Thin Film Technologies, Ming
Chi University of Technology, New
Taipei City 24301, Taiwan
- Institute
of Polymer Science and Engineering, National
Taiwan University, Taipei 106, Taiwan
| | - Chia-Hsien Lee
- Department
of Materials Engineering, Ming Chi University
of Technology, New Taipei
City 24301, Taiwan
- Center
for Plasma and Thin Film Technologies, Ming
Chi University of Technology, New
Taipei City 24301, Taiwan
| | - Xin-Xian Wu
- Department
of Materials Engineering, Ming Chi University
of Technology, New Taipei
City 24301, Taiwan
- Center
for Plasma and Thin Film Technologies, Ming
Chi University of Technology, New
Taipei City 24301, Taiwan
| | - Ru-Jong Jeng
- Institute
of Polymer Science and Engineering, National
Taiwan University, Taipei 106, Taiwan
| | - Chih-Ping Chen
- Department
of Materials Engineering, Ming Chi University
of Technology, New Taipei
City 24301, Taiwan
- Center
for Plasma and Thin Film Technologies, Ming
Chi University of Technology, New
Taipei City 24301, Taiwan
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7
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Duque M, Murillo G. Tapping-Actuated Triboelectric Nanogenerator with Surface Charge Density Optimization for Human Motion Energy Harvesting. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3271. [PMID: 36234398 PMCID: PMC9565772 DOI: 10.3390/nano12193271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/14/2022] [Accepted: 09/15/2022] [Indexed: 06/16/2023]
Abstract
In this article, triboelectric effect has been used to harvest mechanical energy from human motion and convert it into electrical energy. To do so, different ways of optimizing the energy generated have been studied through the correct selection of materials, the design of new spacers to improve the contact surface area, and charge injection by high-voltage corona charging to increase the charge density of dielectric materials. Finally, a triboelectric nanogenerator (TENG) has been manufactured, which is capable of collecting the mechanical energy of the force applied by hand tapping and using it to power miniaturized electronic sensors in a self-sufficient and sustainable way. This work shows the theoretical concept and simulations of the proposed TENG device, as well as the experimental work carried out.
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8
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Cui X, Yu C, Wang Z, Wan D, Zhang H. Triboelectric Nanogenerators for Harvesting Diverse Water Kinetic Energy. MICROMACHINES 2022; 13:mi13081219. [PMID: 36014139 PMCID: PMC9416285 DOI: 10.3390/mi13081219] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 07/23/2022] [Accepted: 07/26/2022] [Indexed: 01/27/2023]
Abstract
The water covering the Earth’s surface not only supports life but also contains a tremendous amount of energy. Water energy is the most important and widely used renewable energy source in the environment, and the ability to extract the mechanical energy of water is of particular interest since moving water is ubiquitous and abundant, from flowing rivers to falling rain drops. In recent years, triboelectric nanogenerators (TENGs) have been promising for applications in harvesting kinetic energy from water due to their merits of low cost, light weight, simple structure, and abundant choice of materials. Furthermore, TENGs can also be utilized as self-powered active sensors for monitoring water environments, which relies on the output signals of the TENGs caused by the movement and composition of water. Here, TENGs targeting the harvest of different water energy sources have been systematically summarized and analyzed. The TENGs for harvesting different forms of water energy are introduced and divided on the basis of their basic working principles and modes, i.e., in the cases of solid–solid and solid–liquid. A detailed review of recent important progress in TENG-based water energy harvesting is presented. At last, based on recent progresses, the existing challenges and future prospects for TENG-based water energy harvesting are also discussed.
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Affiliation(s)
- Xiaojing Cui
- College of Physics and Information Engineering, Shanxi Normal University, Taiyuan 030031, China;
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA;
- College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Cecilia Yu
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA;
| | - Zhaosu Wang
- College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China;
| | - Dong Wan
- College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China;
| | - Hulin Zhang
- College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China;
- Correspondence:
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9
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Liu Z, Li S, Lin S, Shi Y, Yang P, Chen X, Wang ZL. Crystallization-Induced Shift in a Triboelectric Series and Even Polarity Reversal for Elastic Triboelectric Materials. NANO LETTERS 2022; 22:4074-4082. [PMID: 35522039 DOI: 10.1021/acs.nanolett.2c00767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A stretchable triboelectric nanogenerator (TENG) can be a promising solution for the power supply of various flexible electronics. However, the detailed electrification mechanism of elastic triboelectric materials still needs to be clarified. In this work, we found crystallization behavior induced by strain and low temperature can lead to a shift in a triboelectric series for commonly used triboelectric elastomers and even reverse the triboelectric polarity. This effect is attributed to the notable rearrangement of surface electron cloud density happening along with the crystallization process of the molecular chain. This effect is significant with natural rubber, and silicone rubber can experience this effect at low temperature, which also leads to a shift in a triboelectric series, and an applied strain at low temperature can further enhance this shift. This study demonstrated that the electrification polarity of triboelectric materials should be re-evaluated under different strains and different temperatures, which provides a mechanism distinct from the general understanding of elastic triboelectric materials.
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Affiliation(s)
- Zhaoqi Liu
- CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, 100083 Beijing, People's Republic of China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, 100049 Beijing, People's Republic of China
| | - Shuyao Li
- CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, 100083 Beijing, People's Republic of China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, 100049 Beijing, People's Republic of China
| | - Shiquan Lin
- CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, 100083 Beijing, People's Republic of China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, 100049 Beijing, People's Republic of China
| | - Yuxiang Shi
- CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, 100083 Beijing, People's Republic of China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, 100049 Beijing, People's Republic of China
| | - Peng Yang
- CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, 100083 Beijing, People's Republic of China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, 100049 Beijing, People's Republic of China
| | - Xiangyu Chen
- CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, 100083 Beijing, People's Republic of China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, 100049 Beijing, People's Republic of China
| | - Zhong Lin Wang
- CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, 100083 Beijing, People's Republic of China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, 100049 Beijing, People's Republic of China
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
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10
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Abstract
Triboelectricity has been known since antiquity, but the fundamental science underlying this phenomenon lacks consensus. We present a flexoelectric model for triboelectricity where contact deformation induced band bending at the nanoscale is the driving force for charge transfer. This framework is combined with first-principles and finite element calculations to explore charge transfer implications for different contact geometry and materials combinations. We demonstrate that our ab initio based formulation is compatible with existing empirical models and experimental observations including charge transfer between similar materials and size/pressure dependencies associated with triboelectricity.
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Affiliation(s)
- Christopher A Mizzi
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Laurence D Marks
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
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11
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Hasbun JE, Lew Yan Voon LC, Willatzen M. On chain models for contact electrification. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:135501. [PMID: 34983033 DOI: 10.1088/1361-648x/ac47de] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 01/04/2022] [Indexed: 06/14/2023]
Abstract
An exact analytical model of charge dynamics for a chain of atoms with asymmetric hopping terms is presented. Analytic and numeric results are shown to give rise to similar dynamics in both the absence and presence of electron interactions. The chain model is further extended to the case of two atoms per cell (a perfect alloy system). This extension is further applied to contact electrification between two different atomic chains and the effect of increasing the magnitude of the contact transfer matrix element is studied.
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Affiliation(s)
- Javier E Hasbun
- Physics, University of West Georgia, 1601 Maple St., Carrollton, GA 30118, United States of America
| | - Lok C Lew Yan Voon
- Physics, University of West Georgia, 1601 Maple St., Carrollton, GA 30118, United States of America
| | - Morten Willatzen
- Department of Photonics and Engineering, Technical University of Denmark, DK-2800 Kongers Lyngby, Denmark
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Huairou District, Beijing 100140, China
- Department of Mechanical and Electrical Engineering, University of Southern Denmark, DK-6400 Sonderborg, Denmark
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12
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Wang ZL. From contact electrification to triboelectric nanogenerators. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2021; 84:096502. [PMID: 34111846 DOI: 10.1088/1361-6633/ac0a50] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Accepted: 06/10/2021] [Indexed: 05/15/2023]
Abstract
Although the contact electrification (CE) (or usually called 'triboelectrification') effect has been known for over 2600 years, its scientific mechanism still remains debated after decades. Interest in studying CE has been recently revisited due to the invention of triboelectric nanogenerators (TENGs), which are the most effective approach for converting random, low-frequency mechanical energy (called high entropy energy) into electric power for distributed energy applications. This review is composed of three parts that are coherently linked, ranging from basic physics, through classical electrodynamics, to technological advances and engineering applications. First, the mechanisms of CE are studied for general cases involving solids, liquids and gas phases. Various physics models are presented to explain the fundamentals of CE by illustrating that electron transfer is the dominant mechanism for CE for solid-solid interfaces. Electron transfer also occurs in the CE at liquid-solid and liquid-liquid interfaces. An electron-cloud overlap model is proposed to explain CE in general. This electron transfer model is extended to liquid-solid interfaces, leading to a revision of the formation mechanism of the electric double layer at liquid-solid interfaces. Second, by adding a time-dependent polarization termPscreated by the CE-induced surface electrostatic charges in the displacement fieldD, we expand Maxwell's equations to include both the medium polarizations due to electric field (P) and mechanical aggitation and medium boundary movement induced polarization term (Ps). From these, the output power, electromagnetic (EM) behaviour and current transport equation for a TENG are systematically derived from first principles. A general solution is presented for the modified Maxwell's equations, and analytical solutions for the output potential are provided for a few cases. The displacement current arising fromε∂E/∂t is responsible for EM waves, while the newly added term ∂Ps/∂t is responsible for energy and sensors. This work sets the standard theory for quantifying the performance and EM behaviour of TENGs in general. Finally, we review the applications of TENGs for harvesting all kinds of available mechanical energy that is wasted in our daily life, such as human motion, walking, vibration, mechanical triggering, rotating tires, wind, flowing water and more. A summary is provided about the applications of TENGs in energy science, environmental protection, wearable electronics, self-powered sensors, medical science, robotics and artificial intelligence.
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Affiliation(s)
- Zhong Lin Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, People's Republic of China
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States of America
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
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13
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Lin HY, Wang TW, Lin ZH, Yao DJ. A High-voltage TENG-based Droplet Energy Generator with Ultralow Liquid Consumption. IEEE Trans Nanobioscience 2021; 21:358-362. [PMID: 34428149 DOI: 10.1109/tnb.2021.3105098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A solid-liquid triboelectric nanogenerator (TENG) has attracted increasing research interest in relation to the development of regeneration energy based on water resources. The output of solid-liquid TENG remains unsolved, however, because of the low voltage output that impedes wide applications. To this end, in this work we developed a miniaturized microfluidic channel-based TENG device for highly efficient conversion of energy from the transport of a water droplet to an electrical output. We investigated an optimized design in a triboelectric material, the droplet transport and the electrostatic induction layer to provide a high voltage output and stable energy harvesting. The optimized device demonstrated maximum voltage amplitude 102 mV with an ultralow liquid consumption, 0.36 μL, resulting in sample-energy conversion 283.33 mV/μL. This novel device is expected potentially to address the limitations imposed by sample consumption in energy harvesting in the future.
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14
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Zhu Y, Lin S, Gao W, Zhang M, Yang C, Feng P, Xu C, Wang ZL. Effects of Oxygen Vacancies and Cation Valence States on the Triboelectric Property of Substoichiometric Oxide Films. ACS APPLIED MATERIALS & INTERFACES 2021; 13:35795-35803. [PMID: 34297527 DOI: 10.1021/acsami.1c09248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Temperature effects on the contact electrification (CE) is of great interest. Here, different kinds of substoichiometric oxide films, such as TiO2-x, Al2O3-x, Ta2O5-x, and Cr2O3-x, are deposited and annealed at different temperatures, and the CE between the films and a Pt-coated tip is performed by using Kelvin probe force microscopy (KPFM). An intriguing finding is that the polarity on the TiO2-x surface changes from negative to positive with the increase of the sample annealing temperature in air atmosphere. Such a result is attributed to the fact that annealing under an oxidative atmosphere repairs oxygen vacancies and helps upgrade the low valency of Ti3+ to a stable high valency of Ti4+. On the contrary, after annealing occurs in an Ar/H2 atmosphere, the polarity on the TiO2-x surface reverses from positive to negative. This is mainly due to the increase of oxygen vacancies after annealing in reducing atmosphere. Through the KPFM results of Al2O3-x, Ta2O5-x, and Cr2O3-x films, the effect of oxygen vacancies is further confirmed, that is, the decrease of oxygen vacancies eases the films at capturing positive charges. Based on this, TiO2-x-based identical material triboelectric nanogenerators (IM-TENGs) are designed and prepared for the first time to control the current direction. Moreover, a surface state model for explaining the CE mechanism between the metal and annealed dielectric is proposed. This study is conducive to the development of the IM-TENGs which regulate the current direction or voltage output accurately in the future and also provides a further understanding of the dominant mechanism of electron transfer in the CE.
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Affiliation(s)
- Yongqiao Zhu
- School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China
| | - Shiquan Lin
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
| | - Wenchao Gao
- Department of Civil Engineering, Monash University, Clayton 3800, Australia
| | - Miao Zhang
- School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China
| | - Chaogui Yang
- School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China
| | - Peizhong Feng
- School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China
| | - Cheng Xu
- School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
| | - Zhong Lin Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
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15
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Bandi MM, Ishizu N, Kang HB. Electrocharging face masks with corona discharge treatment. Proc Math Phys Eng Sci 2021; 477:20210062. [PMID: 34276243 PMCID: PMC8277463 DOI: 10.1098/rspa.2021.0062] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 06/10/2021] [Indexed: 11/17/2022] Open
Abstract
We detail an experimental method to electrocharge N95 facepiece respirators and face masks (FMs) made from a variety of fabrics (including non-woven polymer and knitted cloth) using corona discharge treatment (CDT). We present practical designs to construct a CDT system from commonly available parts and detail calibrations performed on different fabrics to study their electrocharging characteristics. After confirming the post-CDT structural integrity of fabrics, measurements showed that all non-woven polymer electret and only some knitted cloth fabrics are capable of charge retention. Whereas polymeric fabrics follow the well-known isothermal charging route, ion adsorption causes electrocharging in knitted cloth fabrics. Filtration tests demonstrate improved steady filtration efficiency in non-woven polymer electret filters. On the other hand, knitted cloth fabric filters capable of charge retention start with improved filtration efficiency which decays in time over up to 7 h depending on the fabric type, with filtration efficiency tracking the electric discharge. A rapid recharge for a few seconds ensures FM reuse over multiple cycles without degradation.
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Affiliation(s)
- M. M. Bandi
- Nonlinear and Non-equilibrium Physics Unit, OIST Graduate University, Onna 904 0495, Japan
| | - N. Ishizu
- Engineering Support Section, OIST Graduate University, Onna 904 0495, Japan
| | - H.-B. Kang
- Engineering Support Section, OIST Graduate University, Onna 904 0495, Japan
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16
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Tao X, Nie J, Li S, Shi Y, Lin S, Chen X, Wang ZL. Effect of Photo-Excitation on Contact Electrification at Liquid-Solid Interface. ACS NANO 2021; 15:10609-10617. [PMID: 34101417 DOI: 10.1021/acsnano.1c03358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Liquid-solid triboelectric nanogenerator (L-S TENG) is one of the major techniques to collect energy from tiny liquids, while the saturated charge density at the L-S interface is the key element to decide its performance. Here, we found that the saturated charge density of L-S contact electrification (CE) can be further increased under the illumination of an ultraviolet (UV) light. The fluorine-containing polymers and SiO2 are chosen as the electrification materials and with and without UV illumination on the L-S TENG. A series of experiments have been done to rule out the possible influences of anion generation, chemical change of solid surface, ionization of water, and so on. Therefore, we proposed that electrons belonging to water molecules can be excited to high energy states under UV illumination, which then transfer to solid surface and captured by the solid surface. Finally, a photoexcited electron transfer model is proposed to explain the enhancement of CE under the UV illumination. This work not only helps to further understand CE at L-S interface, but also offers an approach to further enhance the performance of L-S TENG, which can promote the TENG applications in the field of microfluidic systems, liquid energy harvesting, and droplet sensory.
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Affiliation(s)
- Xinglin Tao
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, P.R. China
- College of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Jinhui Nie
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, P.R. China
- College of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Shuyao Li
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, P.R. China
- College of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Yuxiang Shi
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, P.R. China
- College of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Shiquan Lin
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, P.R. China
- College of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Xiangyu Chen
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, P.R. China
- College of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Zhong Lin Wang
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, P.R. China
- College of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
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17
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Xie L, Zhai N, Liu Y, Wen Z, Sun X. Hybrid Triboelectric Nanogenerators: From Energy Complementation to Integration. RESEARCH (WASHINGTON, D.C.) 2021; 2021:9143762. [PMID: 33728411 PMCID: PMC7934836 DOI: 10.34133/2021/9143762] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 12/18/2020] [Indexed: 01/21/2023]
Abstract
Energy collection ways using solar energy, wave, wind, or mechanical energy have attracted widespread attention for small self-powered electronic devices with low power consumption, such as sensors, wearable devices, electronic skin, and implantable devices. Among them, triboelectric nanogenerator (TENG) operated by coupling effect of triboelectrification and electrostatic induction has gradually gained prominence due to its advantages such as low cost, lightweight, high degree of freedom in material selection, large power, and high applicability. The device with a single energy exchange mechanism is limited by its conversion efficiency and work environment and cannot achieve the maximum conversion of energy. Thus, this article reviews the research status of different types of hybrid generators based on TENG in recent years. Hybrid energy generators will improve the output performance though the integration of different energy exchange methods, which have an excellent application prospect. From the perspective of energy complementation, it can be divided into harvesting mechanical energy by various principles, combining with harvesters of other clean energy, and converting mechanical energy or various energy sources into hydrogen energy. For integrating multitype energy harvesters, mechanism of single device and structural design of integrated units for different application scenarios are summarized. The expanding energy harvesting efficiency of the hybrid TENG makes the scheme of self-charging unit to power intelligent mobile electronic feasible and has practical significance for the development of self-powered sensor network.
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Affiliation(s)
- Lingjie Xie
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Ningning Zhai
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Yina Liu
- Department of Applied Mathematics, Xi'an Jiaotong-Liverpool University, Suzhou 215123, China
| | - Zhen Wen
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Xuhui Sun
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
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18
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Quantifying and understanding the triboelectric series of inorganic non-metallic materials. Nat Commun 2020; 11:2093. [PMID: 32350259 PMCID: PMC7190865 DOI: 10.1038/s41467-020-15926-1] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Accepted: 03/30/2020] [Indexed: 11/09/2022] Open
Abstract
Contact-electrification is a universal effect for all existing materials, but it still lacks a quantitative materials database to systematically understand its scientific mechanisms. Using an established measurement method, this study quantifies the triboelectric charge densities of nearly 30 inorganic nonmetallic materials. From the matrix of their triboelectric charge densities and band structures, it is found that the triboelectric output is strongly related to the work functions of the materials. Our study verifies that contact-electrification is an electronic quantum transition effect under ambient conditions. The basic driving force for contact-electrification is that electrons seek to fill the lowest available states once two materials are forced to reach atomically close distance so that electron transitions are possible through strongly overlapping electron wave functions. We hope that the quantified series could serve as a textbook standard and a fundamental database for scientific research, practical manufacturing, and engineering. The mechanism of contact electrification remains a topic of debate. Here, the authors present a quantitative database of the triboelectric charge density and band structure of many inorganic materials, verifying that contact electrification between solids is an electron quantum transition effect.
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19
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Park C, Koo M, Song G, Cho SM, Kang HS, Park TH, Kim EH, Park C. Surface-Conformal Triboelectric Nanopores via Supramolecular Ternary Polymer Assembly. ACS NANO 2020; 14:755-766. [PMID: 31904926 DOI: 10.1021/acsnano.9b07746] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A triboelectric nanogenerator (TENG) is of tremendous interest owing to its high energy efficiency with a simple device architecture and applicability to various materials. Most previous topological surface modifications introduced for further improving the performance of a TENG are detrimental because they require expensive and/or harsh (e.g., high temperature and acidity) postetching processes, which limit the material choice and design of its components. Herein, we demonstrate an one-step route for developing rapid wet-processable surface-conformal triboelectric nanoporous films (STENFs). Our method is based on a simple supramolecular assembly of a ternary polymer blend suitable for various conventional solution processes such as spin-, bar-, spray-, and dip-coating. The one-step wet process of a ternary solution produces thin large-area films in which self-assembled, ordered nanopores of approximately 33 nm in diameter are developed even without an additional etching process. The study reveals that the small amount of amine-terminated poly(ethylene oxide) added to the binary blend of sulfonic-acid-terminated poly(styrene) and poly(2-vinylpyridine) efficiently activates the formation of spontaneous nanopores as a pore-generating agent. Our STENF significantly enhances the open-circuit voltage up to 1.5 times higher than that of a planar one, leading to an improved power density of approximately 77 μW/cm2. The suitability for diverse conventional coating processes offers a convenient approach for fabricating high-performance STENFs not only on flat substrates such as metals, polymers, and oxides but also on topological ones including wrinkled, roughened surfaces, textile fibers, natural leaves, and fabrics over a large area.
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Affiliation(s)
- Chanho Park
- Department of Materials Science and Engineering , Yonsei University , Seoul 03722 , Korea
| | - Min Koo
- Department of Materials Science and Engineering , Yonsei University , Seoul 03722 , Korea
| | - Giyoung Song
- Department of Materials Science and Engineering , Yonsei University , Seoul 03722 , Korea
| | - Suk Man Cho
- Department of Materials Science and Engineering , Yonsei University , Seoul 03722 , Korea
| | - Han Sol Kang
- Department of Materials Science and Engineering , Yonsei University , Seoul 03722 , Korea
| | - Tae Hyun Park
- Department of Materials Science and Engineering , Yonsei University , Seoul 03722 , Korea
| | - Eui Hyuk Kim
- Department of Materials Science and Engineering , Yonsei University , Seoul 03722 , Korea
| | - Cheolmin Park
- Department of Materials Science and Engineering , Yonsei University , Seoul 03722 , Korea
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20
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Zhang Z, Gong W, Bai Z, Wang D, Xu Y, Li Z, Guo J, Turng LS. Oxygen-Rich Polymers as Highly Effective Positive Tribomaterials for Mechanical Energy Harvesting. ACS NANO 2019; 13:12787-12797. [PMID: 31633902 DOI: 10.1021/acsnano.9b04911] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Triboelectric nanogenerators (TENGs) are a potential solution to the depleted state of fossil fuels, on the condition that the energy conversion efficiency can be further improved. Tribomaterials are important not only for improving the output performance of TENGs but also for extending their applications. In this work, a poly-ε-caprolactone (PCL) electrospun membrane is proposed as a highly effective positive tribomaterial, paired with an expanded polytetrafluoroethylene (ePTFE) membrane, to fabricate TENGs (PCL/ePTFE TENGs). Compared with a widely used polyamide-6 (PA6)/ePTFE TENG, the output performance of the PCL/ePTFE TENG is enhanced by about 28%, indicating that PCL possesses a stronger electron-donating ability owing to the existence of oxygen-containing functional groups as electron donors. Furthermore, the PCL membrane is modified using poly(ethylene glycol) methyl ether (mPEG), which possesses more O atoms, by electrospinning (ES) and dip coating (DC). The results reveal that mPEG is very effective at improving the positive electron polarity of PCL. With the increase of mPEG content, the output performance increases by more than 40%, yielding a maximum power density of 115.83 W·m-2. More polymers have been compared to confirm that many oxygen-rich polymers show excellent electron-donating abilities and act as highly efficient positive tribomaterials. This work also provides additional options for more effective positive tribomaterials.
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Affiliation(s)
- Zhi Zhang
- Key Laboratory of Textile Science and Technology, Ministry of Education , College of Textiles Donghua University , Shanghai 201620 , China
- Wisconsin Institute for Discovery , University of Wisconsin-Madison , Madison , Wisconsin 53715 , United States
- Department of Mechanical Engineering , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Wenzheng Gong
- Wisconsin Institute for Discovery , University of Wisconsin-Madison , Madison , Wisconsin 53715 , United States
- Department of Mechanical Engineering , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Zhiqing Bai
- Key Laboratory of Textile Science and Technology, Ministry of Education , College of Textiles Donghua University , Shanghai 201620 , China
| | - Dongfang Wang
- Wisconsin Institute for Discovery , University of Wisconsin-Madison , Madison , Wisconsin 53715 , United States
- Department of Mechanical Engineering , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Yiyang Xu
- Wisconsin Institute for Discovery , University of Wisconsin-Madison , Madison , Wisconsin 53715 , United States
- Department of Mechanical Engineering , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Zhutong Li
- Wisconsin Institute for Discovery , University of Wisconsin-Madison , Madison , Wisconsin 53715 , United States
- Department of Mechanical Engineering , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Jiansheng Guo
- Key Laboratory of Textile Science and Technology, Ministry of Education , College of Textiles Donghua University , Shanghai 201620 , China
| | - Lih-Sheng Turng
- Wisconsin Institute for Discovery , University of Wisconsin-Madison , Madison , Wisconsin 53715 , United States
- Department of Mechanical Engineering , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
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21
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Mizzi CA, Lin AYW, Marks LD. Does Flexoelectricity Drive Triboelectricity? PHYSICAL REVIEW LETTERS 2019; 123:116103. [PMID: 31573269 DOI: 10.1103/physrevlett.123.116103] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Indexed: 06/10/2023]
Abstract
The triboelectric effect, charge transfer during sliding, is well established but the thermodynamic driver is not well understood. We hypothesize here that flexoelectric potential differences induced by inhomogeneous strains at nanoscale asperities drive tribocharge separation. Modeling single asperity elastic contacts suggests that nanoscale flexoelectric potential differences of ±1-10 V or larger arise during indentation and pull-off. This hypothesis agrees with several experimental observations, including bipolar charging during stick slip, inhomogeneous tribocharge patterns, charging between similar materials, and surface charge density measurements.
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Affiliation(s)
- C A Mizzi
- Department of Materials Science and Engineering Northwestern University, Evanston, Illinois 60208, USA
| | - A Y W Lin
- Department of Materials Science and Engineering Northwestern University, Evanston, Illinois 60208, USA
| | - L D Marks
- Department of Materials Science and Engineering Northwestern University, Evanston, Illinois 60208, USA
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22
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Singh SK, Kumar P, Magdum R, Khandelwal U, Deswal S, More Y, Muduli S, Boomishankar R, Pandit S, Ogale S. Seed Power: Natural Seed and Electrospun Poly(vinyl difluoride) (PVDF) Nanofiber Based Triboelectric Nanogenerators with High Output Power Density. ACS APPLIED BIO MATERIALS 2019; 2:3164-3170. [DOI: 10.1021/acsabm.9b00348] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sachin Kumar Singh
- Department of Chemistry and Centre for Energy Science, Indian Institute of Science Education and Research (IISER), Dr. Homi Bhabha Road, Pune 411008, India
| | - Piyush Kumar
- Department of Physics and Centre for Energy Science, Indian Institute of Science Education and Research (IISER), Dr. Homi Bhabha Road, Pune 411008, India
| | - Rushikesh Magdum
- Department of Physics and Centre for Energy Science, Indian Institute of Science Education and Research (IISER), Dr. Homi Bhabha Road, Pune 411008, India
| | - Utkarsh Khandelwal
- Department of Physics and Centre for Energy Science, Indian Institute of Science Education and Research (IISER), Dr. Homi Bhabha Road, Pune 411008, India
| | - Swati Deswal
- Department of Chemistry and Centre for Energy Science, Indian Institute of Science Education and Research (IISER), Dr. Homi Bhabha Road, Pune 411008, India
| | - Yogeshwar More
- Department of Chemistry and Centre for Energy Science, Indian Institute of Science Education and Research (IISER), Dr. Homi Bhabha Road, Pune 411008, India
| | - Subas Muduli
- Department of Physics and Centre for Energy Science, Indian Institute of Science Education and Research (IISER), Dr. Homi Bhabha Road, Pune 411008, India
| | - Ramamoorthy Boomishankar
- Department of Chemistry and Centre for Energy Science, Indian Institute of Science Education and Research (IISER), Dr. Homi Bhabha Road, Pune 411008, India
| | - Sagar Pandit
- Department of Biology, Indian Institute of Science Education and Research (IISER), Dr. Homi Bhabha Road, Pune 411008, India
| | - Satishchandra Ogale
- Department of Physics and Centre for Energy Science, Indian Institute of Science Education and Research (IISER), Dr. Homi Bhabha Road, Pune 411008, India
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23
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Huang WL, Li J, Chen X. 110th Anniversary: Mesoscale Complexity—To Dodge or To Confront? Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b01655] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wen Lai Huang
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, People’s Republic of China
| | - Jinghai Li
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, People’s Republic of China
| | - Xiaosong Chen
- School of Systems Science, Beijing Normal University, Beijing, 100875, People’s Republic of China
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