High‐Entropy Electrolyte Design for Low‐Temperature Supercapacitors
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Wiley Open Access
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| Natura: | Artículo Open Access |
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Wiley
2024
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| _version_ | 1867015125004713984 |
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| author | Chenxi Dong Yuan Wang Zongbin Luo Chunlong Dai Zifeng Lin |
| author_facet | Chenxi Dong Yuan Wang Zongbin Luo Chunlong Dai Zifeng Lin Chenxi Dong Yuan Wang Zongbin Luo Chunlong Dai Zifeng Lin |
| collection | Wiley Open Access |
| contents | High‐Entropy Electrolyte Design for Low‐Temperature Supercapacitors Chenxi Dong Yuan Wang Zongbin Luo Chunlong Dai Zifeng Lin ChemSusChem AbstractSupercapacitors (SCs) are high‐power energy storage devices but often experience reduced electrochemical performance at low temperatures, especially below −30 °C, due to the high freezing points of conventional electrolytes. In this study, we introduce a novel high‐entropy electrolyte (HEE) for supercapacitors that extends operational capabilities over a wide temperature range. The high entropy of the HEE results in an exceptionally low freezing point of −116 °C. With an increased number of solvent molecules in the cation solvation structures, the HEE exhibits high conductivity (3.9 mS cm−1 at −50 °C) and low de‐solvation energy (14.1 kJ mol−1). When incorporated into a carbon‐based SC, the HEE enables a capacitance retention of 58 % at temperatures below −30 °C, compared to 25 °C, while conventional single‐solvent electrolytes retain only 38 %. Additionally, the HEE provides superior high‐rate performance and excellent cycling stability, maintaining 88 % capacitance after 15,000 cycles, compared to 73 % with conventional electrolytes. 10.1002/cssc.202402035 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| doi_str_mv | 10.1002/cssc.202402035 |
| format | Artículo Open Access |
| id | wiley_oa_10_1002_cssc_202402035 |
| institution | Wiley Open Access |
| license_str_mv | http://onlinelibrary.wiley.com/termsAndConditions#vor |
| publishDate | 2024 |
| publisher | Wiley |
| record_format | wiley_oa |
| spellingShingle | High‐Entropy Electrolyte Design for Low‐Temperature Supercapacitors Chenxi Dong Yuan Wang Zongbin Luo Chunlong Dai Zifeng Lin ChemSusChem High‐Entropy Electrolyte Design for Low‐Temperature Supercapacitors Chenxi Dong Yuan Wang Zongbin Luo Chunlong Dai Zifeng Lin ChemSusChem AbstractSupercapacitors (SCs) are high‐power energy storage devices but often experience reduced electrochemical performance at low temperatures, especially below −30 °C, due to the high freezing points of conventional electrolytes. In this study, we introduce a novel high‐entropy electrolyte (HEE) for supercapacitors that extends operational capabilities over a wide temperature range. The high entropy of the HEE results in an exceptionally low freezing point of −116 °C. With an increased number of solvent molecules in the cation solvation structures, the HEE exhibits high conductivity (3.9 mS cm−1 at −50 °C) and low de‐solvation energy (14.1 kJ mol−1). When incorporated into a carbon‐based SC, the HEE enables a capacitance retention of 58 % at temperatures below −30 °C, compared to 25 °C, while conventional single‐solvent electrolytes retain only 38 %. Additionally, the HEE provides superior high‐rate performance and excellent cycling stability, maintaining 88 % capacitance after 15,000 cycles, compared to 73 % with conventional electrolytes. 10.1002/cssc.202402035 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| title | High‐Entropy Electrolyte Design for Low‐Temperature Supercapacitors |
| topic | ChemSusChem |
| url | https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/cssc.202402035 |