期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 816, 期 -, 页码 68-74出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2018.03.044
关键词
Polyolefin separator; Wettability; Ionic conduction; Interface compatibility; Lithium-metal anode
资金
- National 863 Program of China [2012AA03A602]
- National 973 Program of China [2009CB623402]
- Natural Science Foundation of China [20974094]
- Zhejiang Provincial Collaborative Innovation Center Program [G1504126001900]
Lithium metal is a promising anode candidate for the next-generation higher energy density batteries. In this work, a detailed study is carried out to clearly explore the influence of separator wettability on ionic conduction and interface properties for lithium-metal anode batteries. Firstly, polyphenol and polyamine are facilely assembled on the surface of polyethylene (PE) separator with the assistant of periodate. Wettability and electrolyte uptake of the polyphenol-polyamine treated PE separator improves significantly, which resulted in the increase of ionic conductivity and lithium-ion transference number (from 0.37 to 0.49). Subsequently, galvanostatic measurements and electrochemical impedance spectra (EIS) are performed on Li symmetric cells to investigate the effect of separator wettability on interface properties. It is found that the modified PE separator favors the electrochemical process by providing lower interfacial resistance, better interface compatibility, and more uniform deposition of Li+, which correspondingly mitigate the formation of Li dendrites. Finally, lithium-metal anode cells (LiCoO2 (LCO)/Li) assembled with different separators are tested, and superior battery performance is displayed in case of the polyphenol-polyamine treated substrate. These results are expected to be instructive for the design of more durable Li electrodes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据