The effect of Al2O3 coating on the cycle life performance in thin-film LiCoO2 cathodes

被引：77

作者：

Kim, YJ ^{[1
]}

Kim, TJ

Shin, JW

Park, B

Cho, JP

机构：

[1] Seoul Natl Univ, Sch Mat Sci & Engn, Seoul, South Korea

[2] Samsung SDI Co Ltd, Yongin, South Korea

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2002年 / 149卷 / 10期

关键词：

D O I：

10.1149/1.1505634

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrochemical stability of LiCoO2 films is improved by an similar to10 nm Al2O3 coating on top of the thin-film cathode material. Galvanostatic charge/discharge experiments showed enhanced electrochemical properties in the Al2O3-coated LiCoO2 films than the bare ones. This phenomenon is related to the faster Li diffusion rate in the Al2O3-coated samples, as evidenced by cyclic voltammograms. This provides easier pathways for Li-ion migration by forming a thin-film solid solution layer (LiCo1-xAlxO2). Similar results were observed in LiCoO2 powders, showing enhanced cycle performance after coating with a thin-film metal-oxide coating. However, unlike the powder geometry, both bare and Al2O3-coated LiCoO2 thin films showed negligible c axis expansion. (C) 2002 The Electrochemical Society.

引用

页码：A1337 / A1341

页数：5

共 21 条

[11]

Julien C., 1994, Solid State Batteries: Materials Design and Optimization

[12] Effect of microstructures on the microwave dielectric properties of ZrTiO4 thin films [J].

Kim, Y ;

Oh, J ;

Kim, TG ;

Park, B .

APPLIED PHYSICS LETTERS, 2001, 78 (16) :2363-2365

[13] Scaling laws in annealed LiCoOx films [J].

Kleinke, MU ;

Davalos, J ;

da Fonseca, CP ;

Gorenstein, A .

APPLIED PHYSICS LETTERS, 1999, 74 (12) :1683-1685

[14] Substrate effect on the microstructure and electrochemical properties in the deposition of a thin film LiCoO2 electrode [J].

Lee, JK ;

Lee, SJ ;

Baik, HK ;

Lee, HY ;

Jang, SW ;

Lee, SM .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 1999, 2 (10) :512-515

[15] Effects of Al doping on the microstructure of LiCoO2 cathode materials [J].

Myung, ST ;

Kumagai, N ;

Komaba, S ;

Chung, HT .

SOLID STATE IONICS, 2001, 139 (1-2) :47-56

[16] SOLID-STATE REDOX REACTIONS OF LICOO2 (R(3)OVER-BAR-M) FOR 4 VOLT SECONDARY LITHIUM CELLS [J].

OHZUKU, T ;

UEDA, A .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1994, 141 (11) :2972-2977

[17] Pulsed laser deposition and characterization of crystalline lithium cobalt dioxide, (LiCoO2) thin films [J].

Perkins, JD ;

Bahn, CS ;

McGraw, JM ;

Parilla, PA ;

Ginley, DS .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2001, 148 (12) :A1302-A1312

[18] ELECTROCHEMICAL AND INSITU X-RAY-DIFFRACTION STUDIES OF LITHIUM INTERCALATION IN LIXCOO2 [J].

REIMERS, JN ;

DAHN, JR .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1992, 139 (08) :2091-2097

[19] Electrochemical behavior of LiMn2O4 and LiCoO2 thin films produced with pulsed laser deposition [J].

Striebel, KA ;

Deng, CZ ;

Wen, SJ ;

Cairns, EJ .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (06) :1821-1827

[20] Characterization of thin-film rechargeable lithium batteries with lithium cobalt oxide cathodes [J].

Wang, B ;

Bates, JB ;

Hart, FX ;

Sales, BC ;

Zuhr, RA ;

Robertson, JD .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (10) :3203-3213

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