Communication-Controllable Deformation of Composite Graphite Electrodes during Electrochemical Process

被引：4

作者：

Li, Dawei ^{[1
]}

Wang, Yikai ^{[2
]}

机构：

[1] Univ Shanghai Sci & Technol, Sch Mech Engn, Shanghai 200093, Peoples R China

[2] Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40506 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2020年 / 167卷 / 14期

基金：

中国国家自然科学基金;

关键词：

Controlled curvature; Bilayer electrodes; State of charge; Thickness ratio; Lithium ion batteries; BENDING BEAM METHOD; IN-SITU MEASUREMENTS; MECHANICAL-PROPERTIES; STRESS; TRANSPORT; EVOLUTION; ANODES;

D O I：

10.1149/1945-7111/abc0a8

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A large and controllable deformation of a cantilever consisting of a MCMB (MesoCarbon MicroBeads) graphite layer on a Cu foil is reported. In the charging process, the insertion of lithium ions causes the expansion of the MCMB layer and generates stress due to the deformation mismatch between the MCMB layer and Cu foil. By controlling the amount of Li ions and thickness ratio, the initially flat MCMB graphite/Cu electrode can bend into circular shape reversibly. A theoretical mechanical model is proposed to analyze the bending deformation. This super deformation driven by electrochemical reactions may be used for real-time control devices.

引用

页数：4

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