Tuning hybrid liquid/solid electrolytes by lowering Li salt concentration for lithium batteries

doi:10.1088/1674-1056/27/6/068201

中国物理B ›› 2018, Vol. 27 ›› Issue (6): 68201-068201.doi: 10.1088/1674-1056/27/6/068201

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

Tuning hybrid liquid/solid electrolytes by lowering Li salt concentration for lithium batteries

Wei Yang(杨伟), Qi-Di Wang(王启迪), Yu Lei(雷宇), Zi-Pei Wan(万子裴), Lei Qin(秦磊), Wei Yu(余唯), Ru-Liang Liu(刘如亮), Deng-Yun Zhai(翟登云), Hong Li(李泓), Bao-Hua Li(李宝华), Fei-Yu Kang(康飞宇)

1 Advanced Materials Institute, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China;
2 Materials Science Institute, PCFM Laboratory and GDHPPC Laboratory, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China;
3 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2018-01-21 修回日期:2018-03-03 出版日期:2018-06-05 发布日期:2018-06-05
通讯作者: Fei-Yu Kang E-mail:fykang@sz.tsinghua.edu.cn
基金资助:
Project supported by the National Key Basic Research Program of China (Grant No.2014CB932400),the National Natural Science Foundation of China (Grant No.51772167),the China Postdoctoral Science Foundation (Grant No.2016M591169),and the Shenzhen Municipal Basic Research Project,China (Grant No.JCYJ20170412171311288).

Tuning hybrid liquid/solid electrolytes by lowering Li salt concentration for lithium batteries

Wei Yang(杨伟)¹, Qi-Di Wang(王启迪)¹, Yu Lei(雷宇)¹, Zi-Pei Wan(万子裴)¹, Lei Qin(秦磊)¹, Wei Yu(余唯)¹, Ru-Liang Liu(刘如亮)^1,2, Deng-Yun Zhai(翟登云)¹, Hong Li(李泓)³, Bao-Hua Li(李宝华)¹, Fei-Yu Kang(康飞宇)¹

1 Advanced Materials Institute, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China;
2 Materials Science Institute, PCFM Laboratory and GDHPPC Laboratory, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China;
3 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Received:2018-01-21 Revised:2018-03-03 Online:2018-06-05 Published:2018-06-05
Contact: Fei-Yu Kang E-mail:fykang@sz.tsinghua.edu.cn
Supported by:
Project supported by the National Key Basic Research Program of China (Grant No.2014CB932400),the National Natural Science Foundation of China (Grant No.51772167),the China Postdoctoral Science Foundation (Grant No.2016M591169),and the Shenzhen Municipal Basic Research Project,China (Grant No.JCYJ20170412171311288).

摘要/Abstract

摘要：

Hybrid liquid/solid electrolytes (HLSEs) consisting of conventional organic liquid electrolyte (LE), polyacrylonitrile (PAN), and ceramic lithium ion conductor Li_1.5Al_0.5Ge_1.5(PO₄)₃ (LAGP) are proposed and investigated. The HLSE has a high ionic conductivity of over 2.25×10^-3 S/cm at 25℃, and an extended electrochemical window of up to 4.8 V versus Li/Li⁺. The Li|HLSE|Li symmetric cells and Li|HLSE|LiFePO₄ cells exhibit small interfacial area specific resistances (ASRs) comparable to that of LE while much smaller than that of ceramic LAGP electrolyte, and excellent performance at room temperature. Bis(trifluoromethane sulfonimide) salt in HLSE significantly affects the properties and electrochemical behaviors. Side reactions can be effectively suppressed by lowering the concentration of Li salt. It is a feasible strategy for pursuing the high energy density batteries with higher safety.

关键词: lithium battery, hybrid liquid/solid electrolyte, interfacial resistance, salt concentration

Abstract:

Key words: lithium battery, hybrid liquid/solid electrolyte, interfacial resistance, salt concentration

中图分类号: (Lithium-ion batteries)

82.47.Aa

65.40.gk (Electrochemical properties) 82.45.Fk (Electrodes)

杨伟, 王启迪, 雷宇, 万子裴, 秦磊, 余唯, 刘如亮, 翟登云, 李泓, 李宝华, 康飞宇. Tuning hybrid liquid/solid electrolytes by lowering Li salt concentration for lithium batteries[J]. 中国物理B, 2018, 27(6): 68201-068201.

Wei Yang(杨伟), Qi-Di Wang(王启迪), Yu Lei(雷宇), Zi-Pei Wan(万子裴), Lei Qin(秦磊), Wei Yu(余唯), Ru-Liang Liu(刘如亮), Deng-Yun Zhai(翟登云), Hong Li(李泓), Bao-Hua Li(李宝华), Fei-Yu Kang(康飞宇). Tuning hybrid liquid/solid electrolytes by lowering Li salt concentration for lithium batteries[J]. Chin. Phys. B, 2018, 27(6): 68201-068201.

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Tuning hybrid liquid/solid electrolytes by lowering Li salt concentration for lithium batteries

Tuning hybrid liquid/solid electrolytes by lowering Li salt concentration for lithium batteries

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