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Yadav P, Samanta K, Arya V, Biswas D, Kim HS, Bakli C, Jung HY, Ghosh D. A 2.5 V In-Plane Flexi-Pseudocapacitor with Unprecedented Energy and Cycling Efficiency for All-Weather Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2400975. [PMID: 38618920 DOI: 10.1002/smll.202400975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 03/26/2024] [Indexed: 04/16/2024]
Abstract
As electronic devices for aviation, space, and satellite applications become more sophisticated, built-in energy storage devices also require a wider temperature spectrum. Herein, an all-climate operational, energy and power-dense, flexible, in-plane symmetric pseudocapacitor is demonstrated with utmost operational safety and long cycle life. The device is constructed with interdigital-patterned laser-scribed carbon-supported electrodeposited V5O12·6H2O as a binder-free electrode and a novel high-voltage anti-freezing water-in-salt-hybrid electrolyte. The anti-freezing electrolyte can operate over a wide temperature range of -40-60 °C while offering a stable potential window of ≈2.5 V. The device undergoes rigorous testing under diverse environmental conditions, including rapid and regular temperature and mechanical transition over multiple cycles. Additionally, detailed theoretical simulation studies are performed to understand the interfacial interactions with the active material as well as the local behavior of the anti-freeze electrolyte at different temperatures. As a result, the all-weather pseudocapacitor at 1 A g-1 shows a high areal capacitance of 234.7 mF cm-2 at room temperature and maintains a high capacitance of 129.8 mF cm-2 even at -40 °C. Besides, the cell operates very reliably for over 80 950 cycles with a capacitance of 25.7 mF cm-2 at 10 A g-1 and exhibits excellent flexibility and bendability under different stress conditions.
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Affiliation(s)
- Prahlad Yadav
- Centre for Nano and Material Sciences, JAIN (Deemed to be University), Kanakapura Road, Bangalore, Karnataka, 562112, India
| | - Ketaki Samanta
- Department of Materials Engineering, Indian Institute of Science, Bangalore, Karnataka, 560012, India
| | - Vinay Arya
- Thermofluidics and Nanotechnology for Sustainable Energy Systems Laboratory, School of Energy Science and Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India
| | - Diptesh Biswas
- Thermofluidics and Nanotechnology for Sustainable Energy Systems Laboratory, School of Energy Science and Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India
| | - Hun-Seong Kim
- Department of Energy System Engineering, Gyeongsang National University, Jinju-si, Gyeongnam, 52725, South Korea
| | - Chirodeep Bakli
- Thermofluidics and Nanotechnology for Sustainable Energy Systems Laboratory, School of Energy Science and Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India
| | - Hyun Young Jung
- Department of Energy System Engineering, Gyeongsang National University, Jinju-si, Gyeongnam, 52725, South Korea
- Department of Energy Engineering, Gyeongsang National University, Jinju-si, Gyeongnam, 52725, South Korea
| | - Debasis Ghosh
- Centre for Nano and Material Sciences, JAIN (Deemed to be University), Kanakapura Road, Bangalore, Karnataka, 562112, India
- Department of Energy Engineering, Gyeongsang National University, Jinju-si, Gyeongnam, 52725, South Korea
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Malektaj H, Drozdov AD, deClaville Christiansen J. The Effect of Temperature on the Mechanical Properties of Alginate Gels in Water/Alcohol Solutions. Gels 2023; 9:579. [PMID: 37504458 PMCID: PMC10378887 DOI: 10.3390/gels9070579] [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: 06/20/2023] [Revised: 07/03/2023] [Accepted: 07/14/2023] [Indexed: 07/29/2023] Open
Abstract
Alginate organohydrogels prepared in water/alcohol mixtures play an important role in electronic and superconductor applications in low-temperature environments. The study deals with the preparation of Ca-alginate organohydrogels and the analysis of their equilibrium swelling and mechanical properties at sub-zero temperatures. It is shown that the equilibrium degree of swelling at room temperature is noticeably affected by the concentration of co-solvents (methanol, ethanol, and 2-propanol) in the mixtures and the number of carbon atoms in the co-solvent molecules. Mechanical properties are studied in small-amplitude oscillatory tests. The data are fitted with a model that involves three material parameters. The influence of temperature is investigated in temperature-sweep oscillatory tests under a cooling-heating program, where a noticeable difference is observed between the storage and loss moduli under cooling and heating (the hysteresis curves). The hysteresis areas are affected by the cooling/heating rate and the number of carbon atoms in the co-solvents.
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Affiliation(s)
- Haniyeh Malektaj
- Department of Materials and Production, Aalborg University, Fibigerstraede 16, 9220 Aalborg, Denmark
| | - Aleksey D Drozdov
- Department of Materials and Production, Aalborg University, Fibigerstraede 16, 9220 Aalborg, Denmark
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Liu Q, Yang L, Ling W, Guo B, Chen L, Wang J, Zhang J, Wang W, Mo F. Organic electrochromic energy storage materials and device design. Front Chem 2022; 10:1001425. [PMID: 36212068 PMCID: PMC9538391 DOI: 10.3389/fchem.2022.1001425] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 08/09/2022] [Indexed: 12/02/2022] Open
Abstract
While not affecting electrochemical performance of energy storage devices, integrating multi-functional properties such as electrochromic functions into energy storage devices can effectively promote the development of multifunctional devices. Compared with inorganic electrochromic materials, organic materials possess the significant advantages of facile preparation, low cost, and large color contrast. Specifically, most polymer materials show excellent electrochemical properties, which can be widely used in the design and development of energy storage devices. In this article, we focus on the application of organic electrochromic materials in energy storage devices. The working mechanisms, electrochemical performance of different types of organics as well as the shortcomings of organic electrochromic materials in related devices are discussed in detail.
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Affiliation(s)
- Qingjiang Liu
- Sauvage Laboratory for Smart Materials, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, China
| | - Liangliang Yang
- Sauvage Laboratory for Smart Materials, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, China
| | - Wei Ling
- Sauvage Laboratory for Smart Materials, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, China
| | - Binbin Guo
- School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, China
| | - Lina Chen
- Sauvage Laboratory for Smart Materials, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, China
| | - Jiaqi Wang
- Sauvage Laboratory for Smart Materials, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, China
| | - Jiaolong Zhang
- School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, China
- *Correspondence: Jiaolong Zhang, ; Funian Mo,
| | - Wenhui Wang
- Department of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, China
| | - Funian Mo
- Sauvage Laboratory for Smart Materials, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, China
- *Correspondence: Jiaolong Zhang, ; Funian Mo,
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