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Xiong Y, Wang Z, Yan X, Li T, Jing S, Hu T, Jin H, Liu X, Kong W, Huo Y, Ge X. Elastic Polyurethane as Stress-Redistribution-Adhesive-Layer (SRAL) for Directly Integrated High-Energy-Density Flexible Batteries. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2401635. [PMID: 38828658 DOI: 10.1002/advs.202401635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 05/11/2024] [Indexed: 06/05/2024]
Abstract
The low mechanical reliability and integration failure are key challenges hindering the commercialization of geometrically flexible batteries. This work proposes that the failure of directly integrating flexible batteries using traditional rigid adhesives is primarily due to the mismatch between the generated stress at the adhesive/substrate interface, and the maximum allowable stress. Accordingly, a stress redistribution adhesive layer (SRAL) strategy is conceived by using elastic adhesive to redistribute the generated stress. The function mechanism of the SRAL strategy is confirmed by theoretical finite element analysis. Experimentally, a polyurethane (PU) type elastic adhesive (with maximum strain of 1425%) is synthesized and used as the SRAL to integrate rigid cells on different flexible substrates to fabricate directly integrated flexible battery with robust output under various harsh environments, such as stretching, twisting, and even bending in water. The SRAL strategy is expected to be generally applicable in various flexible devices that involve the integration of rigid components onto flexible substrates.
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Affiliation(s)
- Yige Xiong
- Department of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, 550025, P. R. China
| | - Zhongjie Wang
- Department of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, 550025, P. R. China
| | - Xiaohui Yan
- Department of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, 550025, P. R. China
| | - Taibai Li
- Department of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, 550025, P. R. China
| | - Siqi Jing
- Department of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, 550025, P. R. China
| | - Tao Hu
- Department of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, 550025, P. R. China
| | - Huixin Jin
- Department of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, 550025, P. R. China
| | - Xuncheng Liu
- Department of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, 550025, P. R. China
| | - Weibo Kong
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Yonglin Huo
- Department of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, 550025, P. R. China
| | - Xiang Ge
- Department of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, 550025, P. R. China
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Ranjan B, Kaur D. Pseudocapacitive Storage in Molybdenum Oxynitride Nanostructures Reactively Sputtered on Stainless-Steel Mesh Towards an All-Solid-State Flexible Supercapacitor. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2307723. [PMID: 38100301 DOI: 10.1002/smll.202307723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 11/10/2023] [Indexed: 12/17/2023]
Abstract
Exploiting pseudocapacitance in rationally engineered nanomaterials offers greater energy storage capacities at faster rates. The present research reports a high-performance Molybdenum Oxynitride (MoON) nanostructured material deposited directly over stainless-steel mesh (SSM) via reactive magnetron sputtering technique for flexible symmetric supercapacitor (FSSC) application. The MoON/SSM flexible electrode manifests remarkable Na+-ion pseudocapacitive kinetics, delivering exceptional ≈881.83 F g-1 capacitance, thanks to the synergistically coupled interfaces and junctions between nanostructures of Mo2N, MoO2, and MoO3 co-existing phases, resulting in enhanced specific surface area, increased electroactive sites, improved ionic and electronic conductivity. Employing 3D Bode plots, b-value, and Dunn's analysis, a comprehensive insight into the charge-storage mechanism has been presented, revealing the superiority of surface-controlled capacitive and pseudocapacitive kinetics. Utilizing PVA-Na2SO4 gel electrolyte, the assembled all-solid-state FSSC (MoON/SSM||MoON/SSM) exhibits impressive cell capacitance of 30.7 mF cm-2 (438.59 F g-1) at 0.125 mA cm-2. Moreover, the FSSC device outputs a superior energy density of 4.26 µWh cm-2 (60.92 Wh kg-1) and high power density of 2.5 mW cm-2 (35.71 kW kg-1). The device manifests remarkable flexibility and excellent electrochemical cyclability of ≈91.94% over 10,000 continuous charge-discharge cycles. These intriguing pseudocapacitive performances combined with lightweight, cost-effective, industry-feasible, and environmentally sustainable attributes make the present MoON-based FSSC a potential candidate for energy-storage applications in flexible electronics.
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Affiliation(s)
- Bhanu Ranjan
- Functional Nanomaterials Research Laboratory (FNRL), Department of Physics, Indian Institute of Technology Roorkee (IIT Roorkee), Roorkee, Uttarakhand, 247667, India
| | - Davinder Kaur
- Functional Nanomaterials Research Laboratory (FNRL), Department of Physics, Indian Institute of Technology Roorkee (IIT Roorkee), Roorkee, Uttarakhand, 247667, India
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Wu W, Yao W, Zuo L, Li X, Yang X, Liu Y, Tang Z. Flexible Full-Inorganic Ultrathin Films with Stable Circularly Polarized Luminescence Covering the Visible to Near-Infrared Region. Chemphyschem 2024:e202400138. [PMID: 38507137 DOI: 10.1002/cphc.202400138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 03/19/2024] [Accepted: 03/19/2024] [Indexed: 03/22/2024]
Abstract
Circularly polarized luminescence (CPL) materials hold significant value in various fields, including information storage, secure communication, three-dimensional displays, biological detection, and optoelectronic devices. Using the Langmuir-Schaeffer (LS) assembly technique, we successfully construct a series of large-area flexible optical ultrathin films. Impressively, the inorganic assembled ultrathin films exhibit excellent CPL optical activity covering the visible to near-infrared (NIR) region, with the luminescence asymmetry factor glum ranging from 0.59 to 0.72. Moreover, such ultrathin films also display outstanding mechanical flexibility, the optical activity of which even after 240 bending cycles shows almost no difference compared to the unbent samples. Owing to the ultra-broadband optical activity and ultra-stable optical activity of such full-inorganic assembled materials on flexible substrates, coupled with their excellent processability and outstanding mechanical flexibility, we anticipate they will find use in many fields such as communication technology and flexible optoelectronics.
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Affiliation(s)
- Wenxuan Wu
- Chinese Academy of Sciences (CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Wenyan Yao
- Chinese Academy of Sciences (CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Lulu Zuo
- Chinese Academy of Sciences (CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Xinwei Li
- Chinese Academy of Sciences (CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Xuekang Yang
- Chinese Academy of Sciences (CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Yaling Liu
- Chinese Academy of Sciences (CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Zhiyong Tang
- Chinese Academy of Sciences (CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100190, P. R. China
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Ranjan B, Kaur D. Pseudocapacitive Kinetics in Synergistically Coupled MoS 2-Mo 2N Nanowires with Enhanced Interfaces toward All-Solid-State Flexible Supercapacitors. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38491945 DOI: 10.1021/acsami.4c00067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/18/2024]
Abstract
Pseudocapacitive kinetics in rationally engineered nanostructures can deliver higher energy and power densities simultaneously. The present report reveals a high-performance all-solid-state flexible symmetric supercapacitor (FSSC) based on MoS2-Mo2N nanowires deposited directly on stainless steel mesh (MoS2-Mo2N/SSM) employing DC reactive magnetron co-sputtering technology. The abundance of synergistically coupled interfaces and junctions between MoS2 nanosheets and Mo2N nanostructures across the nanocomposite results in greater porosity, increased ionic conductivity, and superior electrical conductivity. Consequently, the FSSC device utilizing poly(vinyl alcohol)-sodium sulfate (PVA-Na2SO4) hydrogel electrolyte renders an outstanding cell capacitance of 252.09 F·g-1 (44.12 mF·cm-2) at 0.25 mA·cm-2 and high rate performance within a wide 1.3 V window. Dunn's and b-value analysis reveals significant energy storage by surface-controlled capacitive and pseudocapacitive mechanisms. Remarkably, the symmetric device boosts tremendous energy density ∼10.36 μWh·cm-2 (59.17 Wh·kg-1), superb power density ∼6.5 mW·cm-2 (37.14 kW·kg-1), ultrastable long cyclability (∼93.7% after 10,000 galvanostatic charge-discharge cycles), and impressive mechanical flexibility at 60°, 90°, and 120° bending angles.
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Affiliation(s)
- Bhanu Ranjan
- Functional Nanomaterials Research Laboratory (FNRL), Department of Physics, Indian Institute of Technology Roorkee (IIT Roorkee), Roorkee 247667, Uttarakhand, India
| | - Davinder Kaur
- Functional Nanomaterials Research Laboratory (FNRL), Department of Physics, Indian Institute of Technology Roorkee (IIT Roorkee), Roorkee 247667, Uttarakhand, India
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