Cycling-Driven Structural Changes in a Thin-Film Lithium Battery on Flexible Substrate

被引：19

作者：

Song, Seung-Wan ^{[1
]}

Hong, Sung-Jin

Park, Ho Young ^{[2
]}

Lim, Young Chang ^{[2
]}

Lee, Ki Chang ^{[2
]}

机构：

[1] Chungnam Natl Univ, Dept Fine Chem Engn & Appl Chem, Taejon 305764, South Korea

[2] Nuricell Inc, Microcell Ctr, Seoul 134848, South Korea

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2009年 / 12卷 / 08期

关键词：

electrochemical electrodes; lithium; lithium compounds; mechanical strength; phase transformations; platinum; Raman spectra; scanning electron microscopy; secondary cells; shrinkage; surface roughness; thin films; PHOSPHORUS OXYNITRIDE; LICOO2; CATHODES; ELECTROLYTE; ELECTROCHEMISTRY; 400-DEGREES-C; FABRICATION; SPINEL;

D O I：

10.1149/1.3139530

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Long-term cycling effects on thin-film lithium batteries of 10 mu m thick Li/LIPON/LiCoO2 deposited on a flexible substrate were investigated. Scanning electron microscopic and Raman spectroscopic analysis results revealed that cycling resulted in an increased fraction of (003)-oriented grains in originally (101)/(104)-oriented LiCoO2 films in a hexagonal structure followed by a phase transition to a low temperature spinel phase and shrinkage of the LiCoO2 films and roughening of the Pt-LiCoO2 interface, leading to a capacity decline of similar to 27% over 1040 cycles. The data contribute to a basic understanding of the structural causes responsible for the internal cell resistance and the cycle life of all-solid-state thin-film batteries.

引用

页码：A159 / A162

页数：4

共 27 条

[1] CoO2, the end member of the LixCoO2 solid solution [J].