Concentrated Electrolytes Widen the Operating Temperature Range of Lithium‐Ion Batteries
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- Jianhui Wang
- Key Laboratory of 3D Micro/nano Fabrication and Characterization of Zhejiang Province School of Engineering Westlake University Hangzhou 310024 China
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- Qifeng Zheng
- School of Chemistry South China Normal University Guangzhou 510631 China
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- Mingming Fang
- Key Laboratory of 3D Micro/nano Fabrication and Characterization of Zhejiang Province School of Engineering Westlake University Hangzhou 310024 China
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- Seongjae Ko
- Department of Chemical System Engineering University of Tokyo Tokyo 113‐8656 Japan
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- Yuki Yamada
- Department of Chemical System Engineering University of Tokyo Tokyo 113‐8656 Japan
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- Atsuo Yamada
- Department of Chemical System Engineering University of Tokyo Tokyo 113‐8656 Japan
説明
<jats:title>Abstract</jats:title><jats:p>The operating temperatures of commercial lithium‐ion batteries (LIBs) are generally restricted to a narrow range of −20 to 55 °C because the electrolyte is composed of highly volatile and flammable organic solvents and thermally unstable salts. Herein, the use of concentrated electrolytes is proposed to widen the operating temperature to −20 to 100 °C. It is demonstrated that a 4.0 mol L<jats:sup>−1</jats:sup> LiN(SO<jats:sub>2</jats:sub>F)<jats:sub>2</jats:sub>/dimethyl carbonate electrolyte enables the stable charge–discharge cycling of a graphite anode and a high‐capacity LiNi<jats:sub>0.6</jats:sub>Co<jats:sub>0.2</jats:sub>Mn<jats:sub>0.2</jats:sub>O<jats:sub>2</jats:sub> cathode and the corresponding full cell in a wide temperature range from −20 to 100 °C owing to the highly thermal stable solvation structure of the concentrated electrolyte together with the robust and Li<jats:sup>+</jats:sup>‐conductive passivation interphase it offered that alleviate various challenges at high temperatures. This work demonstrates the potential for the development of safe LIBs without the need for bulky and heavy thermal management systems, thus significantly increasing the overall energy density.</jats:p>
収録刊行物
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- Advanced Science
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Advanced Science 8 (18), 2021-07-23
Wiley
