Li+ ion diffusion in LiMn2O4 thin film prepared by PVP sol-gel method

被引：51

作者：

Rho, Young Ho

Dokko, Kaoru

Kanamura, Kiyoshi

机构：

[1] Tokyo Metropolitan Univ, Grad Sch Engn, Dept Appl Chem, Hachioji, Tokyo 1920397, Japan

[2] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan

来源：

JOURNAL OF POWER SOURCES | 2006年 / 157卷 / 01期

关键词：

LiMn2O4; sol-gel; thin-film electrode; rechargeable lithium batteries; diffusion coefficient;

D O I：

10.1016/j.jpowsour.2005.07.050

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

LiMn2O4 thin film (I mu m thick) was prepared on a gold substrate by the PVP sol-gel method. The electrochemical properties of the thin-film electrode were studied in an electrolyte I mol dm(-3) LiClO4/(ethylenecarbonate + diethyl carbonate). The prepared LiMn2O4 showed a good charge-discharge performance, and the capacity fade was ca. 20% during 200 cycles. The Li+ ion diffusion in the LiMn2O4 thin film was investigated by means of potentiostatic intermittent titration technique and electrochemical impedance spectroscopy. The chemical diffusion coefficients were estimated to be 10(-8) to 10(-10) cm(2) S-1. (c) 2005 Elsevier B.V. All rights reserved.

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页码：471 / 476

页数：6

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