Solid Electrolyte/Lithium Anodes Stabilized by Reduced Graphene Oxide Interlayers: Implications for Solid-State Lithium Batteries

被引:12
作者
Zhang, Lu-ke [1 ]
Xu, Hui-min [1 ]
Jing, Mao-xiang [1 ]
Li, Lin-xin [1 ]
Yang, Hua [1 ]
Shen, Xiang-qian [1 ,2 ]
机构
[1] Jiangsu Univ, Sch Mat Sci & Engn, Inst Adv Mat, Zhenjiang 212013, Jiangsu, Peoples R China
[2] Changsha Res Inst Min & Met Co Ltd, Changsha 410012, Peoples R China
基金
中国国家自然科学基金;
关键词
solid-state lithium battery; interface stability; graphene oxide; reduced graphene oxide; in situ formation; INTERFACE MODIFICATION; METAL; GROWTH;
D O I
10.1021/acsanm.1c01932
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Poor interfacial compatibility between the solid polymer electrolyte and lithium anode is one of bottleneck issues for the wide application of solid-state lithium batteries. In this work, a strategy to improve the stability of a solid electrolyte/anode interface by applying graphene oxide (GO) coating on the surface of the poly(propylene carbonate) (PPC) solid electrolyte membrane to react with metal Li and spontaneously reducing in situ to form a reduced graphene oxide (rGO) interface-modified layer was proposed. The rGO interlayer contributes to the combination of an interface and inhibition of lithium dendrites. The GO-modified composite solid electrolyte (GO-SE) shows a wide electrochemical window of up to 4.8 V, high room temperature ionic conductivity reaching 2.22 X 10(-4) S.cm(-1), and a high ion migration number of 0.9. This GO-SE is suitable for high-voltage solid-state lithium batteries, and the assembled NCM622/GO-SE/Li cells have an initial specific capacity of about 160 mA h/g at 0.5 C, and the specific capacity remains above 100 mA h/g after 200 cycles, much more stable than that of the battery with an unmodified SE membrane at different rates from 0.1 to 2 C. This interface modification method is promising to be widely applied in the solid-state lithium batteries.
引用
收藏
页码:9471 / 9478
页数:8
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