High-voltage, low-temperature supercapacitors enabled by localized “water-in-pyrrolidinium chloride” electrolyte
Aqueous electrolytes offer superior prospects for advanced energy storage. “Water-in-salt” (WIS) electrolytes exhibit a wide electrochemical stability window (ESW), but their low conductivity, high viscosity, and precipitation at low temperatures restrict their application. Herein, we report a novel...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co. Ltd.
2023-12-01
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| Series: | eScience |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2667141723001246 |
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| author | Peng Zhang Weili Zhang Zhengjie Wang Xuefei Wang Qingjuan Ren Shuai Zhang Yujia Wang Liang He Pan Liu Qingyin Zhang Zhiqiang Shi |
| author_facet | Peng Zhang Weili Zhang Zhengjie Wang Xuefei Wang Qingjuan Ren Shuai Zhang Yujia Wang Liang He Pan Liu Qingyin Zhang Zhiqiang Shi |
| author_sort | Peng Zhang |
| collection | DOAJ |
| description | Aqueous electrolytes offer superior prospects for advanced energy storage. “Water-in-salt” (WIS) electrolytes exhibit a wide electrochemical stability window (ESW), but their low conductivity, high viscosity, and precipitation at low temperatures restrict their application. Herein, we report a novel localized “water-in-pyrrolidinium chloride” electrolyte (LWIP; 1 mol/L, N-propyl-N-methylpyrrolidinium chloride/(water and N,N-dimethylformamide, 1:4 by molality)) enabling high-voltage, low-temperature supercapacitors (SCs). The greatly improved ESW (3.451 V) is mainly attributed to the strong solvation between Cl− and water molecules, which broadens the negative stability. This water-binding mechanism is very different from that of a WIS electrolyte based on alkali metal salt. SCs using LWIP electrolytes not only yield a high operating voltage of 2.4 V and excellent capacity retention (82.8% after 15,000 cycles at 5 A g−1) but also operate stably at −20 °C. This work provides new approaches for the design and preparation of novel electrolytes. |
| first_indexed | 2024-03-09T14:14:53Z |
| format | Article |
| id | doaj.art-91fab042e5844db39f4b8b9b1aa88196 |
| institution | Directory Open Access Journal |
| issn | 2667-1417 |
| language | English |
| last_indexed | 2024-03-09T14:14:53Z |
| publishDate | 2023-12-01 |
| publisher | KeAi Communications Co. Ltd. |
| record_format | Article |
| series | eScience |
| spelling | doaj.art-91fab042e5844db39f4b8b9b1aa881962023-11-29T04:25:07ZengKeAi Communications Co. Ltd.eScience2667-14172023-12-0136100184High-voltage, low-temperature supercapacitors enabled by localized “water-in-pyrrolidinium chloride” electrolytePeng Zhang0Weili Zhang1Zhengjie Wang2Xuefei Wang3Qingjuan Ren4Shuai Zhang5Yujia Wang6Liang He7Pan Liu8Qingyin Zhang9Zhiqiang Shi10Tianjin Key Laboratory of Advanced Fibers and Energy Storage, College of Materials Science and Engineering, Tiangong University, Tianjin 300387, China; Cangzhou Institute of Tiangong University, Cangzhou 061000, ChinaTianjin Key Laboratory of Advanced Fibers and Energy Storage, College of Materials Science and Engineering, Tiangong University, Tianjin 300387, ChinaTianjin Key Laboratory of Advanced Fibers and Energy Storage, College of Materials Science and Engineering, Tiangong University, Tianjin 300387, ChinaTianjin Key Laboratory of Advanced Fibers and Energy Storage, College of Materials Science and Engineering, Tiangong University, Tianjin 300387, ChinaTianjin Key Laboratory of Advanced Fibers and Energy Storage, College of Materials Science and Engineering, Tiangong University, Tianjin 300387, ChinaTianjin Key Laboratory of Advanced Fibers and Energy Storage, College of Materials Science and Engineering, Tiangong University, Tianjin 300387, ChinaTianjin Key Laboratory of Advanced Fibers and Energy Storage, College of Materials Science and Engineering, Tiangong University, Tianjin 300387, ChinaTianjin Key Laboratory of Advanced Fibers and Energy Storage, College of Materials Science and Engineering, Tiangong University, Tianjin 300387, ChinaTianjin Key Laboratory of Advanced Fibers and Energy Storage, College of Materials Science and Engineering, Tiangong University, Tianjin 300387, ChinaCollege of Chemical Engineering and Technology, Tiangong University, Tianjin 300387, China; Corresponding authors.Tianjin Key Laboratory of Advanced Fibers and Energy Storage, College of Materials Science and Engineering, Tiangong University, Tianjin 300387, China; Cangzhou Institute of Tiangong University, Cangzhou 061000, China; Corresponding authors.Aqueous electrolytes offer superior prospects for advanced energy storage. “Water-in-salt” (WIS) electrolytes exhibit a wide electrochemical stability window (ESW), but their low conductivity, high viscosity, and precipitation at low temperatures restrict their application. Herein, we report a novel localized “water-in-pyrrolidinium chloride” electrolyte (LWIP; 1 mol/L, N-propyl-N-methylpyrrolidinium chloride/(water and N,N-dimethylformamide, 1:4 by molality)) enabling high-voltage, low-temperature supercapacitors (SCs). The greatly improved ESW (3.451 V) is mainly attributed to the strong solvation between Cl− and water molecules, which broadens the negative stability. This water-binding mechanism is very different from that of a WIS electrolyte based on alkali metal salt. SCs using LWIP electrolytes not only yield a high operating voltage of 2.4 V and excellent capacity retention (82.8% after 15,000 cycles at 5 A g−1) but also operate stably at −20 °C. This work provides new approaches for the design and preparation of novel electrolytes.http://www.sciencedirect.com/science/article/pii/S2667141723001246Localized “water-in-pyrrolidinium chloride” electrolyteHigh voltageLow temperatureAqueous supercapacitorsHigh power/energy density |
| spellingShingle | Peng Zhang Weili Zhang Zhengjie Wang Xuefei Wang Qingjuan Ren Shuai Zhang Yujia Wang Liang He Pan Liu Qingyin Zhang Zhiqiang Shi High-voltage, low-temperature supercapacitors enabled by localized “water-in-pyrrolidinium chloride” electrolyte eScience Localized “water-in-pyrrolidinium chloride” electrolyte High voltage Low temperature Aqueous supercapacitors High power/energy density |
| title | High-voltage, low-temperature supercapacitors enabled by localized “water-in-pyrrolidinium chloride” electrolyte |
| title_full | High-voltage, low-temperature supercapacitors enabled by localized “water-in-pyrrolidinium chloride” electrolyte |
| title_fullStr | High-voltage, low-temperature supercapacitors enabled by localized “water-in-pyrrolidinium chloride” electrolyte |
| title_full_unstemmed | High-voltage, low-temperature supercapacitors enabled by localized “water-in-pyrrolidinium chloride” electrolyte |
| title_short | High-voltage, low-temperature supercapacitors enabled by localized “water-in-pyrrolidinium chloride” electrolyte |
| title_sort | high voltage low temperature supercapacitors enabled by localized water in pyrrolidinium chloride electrolyte |
| topic | Localized “water-in-pyrrolidinium chloride” electrolyte High voltage Low temperature Aqueous supercapacitors High power/energy density |
| url | http://www.sciencedirect.com/science/article/pii/S2667141723001246 |
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