Electrochemical investigation of CrO2.65 doped LiMn2O4 as a cathode material for lithium-ion batteries

被引：143

作者：

Zhang, D ^{[1
]}

Popov, BN ^{[1
]}

White, RE ^{[1
]}

机构：

[1] Univ S Carolina, Dept Chem Engn, Columbia, SC 29208 USA

来源：

JOURNAL OF POWER SOURCES | 1998年 / 76卷 / 01期

关键词：

chemically modified chromium oxide; doped spinel; capacity retention; electrochemical impedance spectroscopy;

D O I：

10.1016/S0378-7753(98)00143-8

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：

Quaternary spinels doped with chemically modified chromium oxide (mCrO(2.65)) LiCryMn2-yO4 with y = 0.02, 0.05 and 0.1 completely stabilize the spinel structure. Cyclic voltammograms of pure spinel exhibit high irreversibility compared with that obtained initially. The spinel doped with chemically modified chrome oxide mCrO(2.65) causes the peak separation to decrease contributing to the electrochemical reversibility of the doped cathode material. Negligible shift of the peak potentials was observed for these cathodes. Chromium dopant enhances the mass transfer of Li+ in the active material. The Li+ diffusion coefficient in LiCr0.1Mn1.9O4 estimated from an analysis of the Warburg impedance is two order of magnitude higher than that in pure spinel. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：81 / 90

页数：10

共 39 条

[11] STUDY OF THE NEW K2NIF4-TYPE SOLID-SOLUTIONS SR2FEXRU1-XO4 BY MOSSBAUER-SPECTROSCOPY AND OTHER TECHNIQUES
GREATREX, R
GREENWOOD, NN
LAL, M
[J]. MATERIALS RESEARCH BULLETIN, 1980, 15 (01) : 113 - 120
[12] IMPROVED CAPACITY RETENTION IN RECHARGEABLE 4V LITHIUM LITHIUM MANGANESE OXIDE (SPINEL) CELLS
GUMMOW, RJ
DEKOCK, A
THACKERAY, MM
[J]. SOLID STATE IONICS, 1994, 69 (01) : 59 - 67
[13] Guohua L., 1996, J. Electrochem. Soc, V143, P178
[14] RECHARGEABLE LI1+XMN2O4/CARBON CELLS WITH A NEW ELECTROLYTE-COMPOSITION - POTENTIOSTATIC STUDIES AND APPLICATION TO PRACTICAL CELLS
GUYOMARD, D
TARASCON, JM
[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1993, 140 (11) : 3071 - 3081
[15] The defect structure model in nonstoichiometric LiMn2O4-delta
Hosoya, M
Ikuta, H
Uchida, T
Wakihara, M
[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1997, 144 (04) : L52 - L53
[16] PREPARATION OF A NEW CRYSTAL FORM OF MANGANESE-DIOXIDE - LAMBDA-MNO2
HUNTER, JC
[J]. JOURNAL OF SOLID STATE CHEMISTRY, 1981, 39 (02) : 142 - 147
[17] Dissolution of spinel oxides and capacity losses in 4V Li/LixMn2O4 coils
Jang, DH
Shin, YJ
Oh, SM
[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (07) : 2204 - 2211
[18] AC impedance analysis for Li+ insertion of a Pt/lambda-MnO2 electrode in an aqueous phase
Kanoh, H
Feng, Q
Hirotsu, T
Ooi, K
[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (08) : 2610 - 2615
[19] Mosbah A., 1983, Materials Research Bulletin, V18, P1375, DOI 10.1016/0025-5408(83)90045-4
[20] Nagaura T., 1990, PROG BATT SOLAR CELL, V9, P209

← 1 2 3 4 →