Artificial solid electrolyte interphase based on polyacrylonitrile for homogenous and dendrite-free deposition of lithium metal

doi:10.1088/1674-1056/28/7/078202

中国物理B ›› 2019, Vol. 28 ›› Issue (7): 78202-078202.doi: 10.1088/1674-1056/28/7/078202

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

Artificial solid electrolyte interphase based on polyacrylonitrile for homogenous and dendrite-free deposition of lithium metal

Hang-Yu Xu(徐航宇), Quan Li(李泉), Hong-Yi Pan(潘弘毅), Ji-Liang Qiu(邱纪亮), Wen-Zhuo Cao(曹文卓), Xi-Qian Yu(禹习谦), Hong Li(李泓)

1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China

收稿日期:2019-04-04 修回日期:2019-05-16 出版日期:2019-07-05 发布日期:2019-07-05
通讯作者: Xi-Qian Yu, Hong Li E-mail:hli@iphy.ac.cn;xyu@iphy.ac.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 51822211 and 51802342) and the State Grid Technology Project, China (Grant No. DG71-17-010).

Artificial solid electrolyte interphase based on polyacrylonitrile for homogenous and dendrite-free deposition of lithium metal

Hang-Yu Xu(徐航宇)^1,2, Quan Li(李泉)^1,2, Hong-Yi Pan(潘弘毅)^1,2, Ji-Liang Qiu(邱纪亮)^1,2, Wen-Zhuo Cao(曹文卓)^1,2, Xi-Qian Yu(禹习谦)^1,2, Hong Li(李泓)^1,2

1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China

Received:2019-04-04 Revised:2019-05-16 Online:2019-07-05 Published:2019-07-05
Contact: Xi-Qian Yu, Hong Li E-mail:hli@iphy.ac.cn;xyu@iphy.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 51822211 and 51802342) and the State Grid Technology Project, China (Grant No. DG71-17-010).

摘要/Abstract

摘要：

High chemical reactivity, large volume changes, and uncontrollable lithium dendrite growth have always been the key problems of lithium metal anodes. Coating has been demonstrated as an effective strategy to protect the lithium metal. In this work, the effects of polyacrylonitrile (PAN)-based coatings on electrodeposited lithium have been studied. Our results show that a PAN coating layer provides uniform and dendrite-free lithium deposition as well as better cycling performance with carbonate electrolyte. Notably, heat treatment of the PAN coating layer promotes the formation of larger deposit particle size and higher coulombic efficiency (85%). The compact coating layer of heat-treated PAN with a large Young modulus (82.7 GPa) may provide stable protection for the active lithium. Improved homogeneity of morphology and mechanical properties of heat-treated PAN contribute to the larger deposit particles. This work provides new feasibility to optimize the polymer coating through rational modification of polymers.

关键词: lithium deposition, polymer coating, artificial solid electrolyte interphase, polyacrylonitrile

Abstract:

Key words: lithium deposition, polymer coating, artificial solid electrolyte interphase, polyacrylonitrile

中图分类号: (Lithium-ion batteries)

82.47.Aa

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

徐航宇, 李泉, 潘弘毅, 邱纪亮, 曹文卓, 禹习谦, 李泓. Artificial solid electrolyte interphase based on polyacrylonitrile for homogenous and dendrite-free deposition of lithium metal[J]. 中国物理B, 2019, 28(7): 78202-078202.

Hang-Yu Xu(徐航宇), Quan Li(李泉), Hong-Yi Pan(潘弘毅), Ji-Liang Qiu(邱纪亮), Wen-Zhuo Cao(曹文卓), Xi-Qian Yu(禹习谦), Hong Li(李泓). Artificial solid electrolyte interphase based on polyacrylonitrile for homogenous and dendrite-free deposition of lithium metal[J]. Chin. Phys. B, 2019, 28(7): 78202-078202.

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Artificial solid electrolyte interphase based on polyacrylonitrile for homogenous and dendrite-free deposition of lithium metal

Artificial solid electrolyte interphase based on polyacrylonitrile for homogenous and dendrite-free deposition of lithium metal

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