Effect of crystallinity on the electrochemical behaviour of spinel Li1.03Mn2O4 cathode materials

被引:36
作者
Sun, YK
Lee, KH
Moon, SI
Oh, IH
机构
[1] Samsung Adv Inst Technol, Cent Res Inst Chem Technol, Daejon 305380, South Korea
[2] Korea Electrotechnol Res Inst, Elect Mat Dept, Changwon 641600, South Korea
[3] Korea Inst Sci & Technol, Div Chem Engn, Seoul 136791, South Korea
关键词
lithium secondary battery; lithium manganese oxide; sol-gel method; chelating agent; glycolic acid;
D O I
10.1016/S0167-2738(98)00235-5
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
The spinel Li1.03Mn2O4 powders with a different crystallinity were synthesized by a sol-gel method from an aqueous solution of metal acetates containing glycolic acid as a chelating agent. The relation between physicochemical and electrochemical properties of the Li1.03Mn2O4 powders was studied. It was seen that as the calcination temperature increased, the lattice constant linearly increased whereas the average oxidation state of manganese linearly decreased, which resulted in an increase in crystallinity of the Li1.03Mn2O4 host. The capacity in the 4 V region Linearly increased with increasing the lattice constant of the cubic unit cell and decreasing the average oxidation state of manganese. The glycolic acid-assisted Li1.03Mn2O4 powders calcined at 800 degrees C have delivered a discharge capacity of 134 mAh/g and shown an excellent cyclability. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:237 / 243
页数:7
相关论文
共 20 条
[1]   THE USE OF ACETATES AS PRECURSORS FOR THE LOW-TEMPERATURE SYNTHESIS OF LIMN2O4 AND LICOO2 INTERCALATION COMPOUNDS [J].
BARBOUX, P ;
TARASCON, JM ;
SHOKOOHI, FK .
JOURNAL OF SOLID STATE CHEMISTRY, 1991, 94 (01) :185-196
[2]   IMPROVED CAPACITY RETENTION IN RECHARGEABLE 4V LITHIUM LITHIUM MANGANESE OXIDE (SPINEL) CELLS [J].
GUMMOW, RJ ;
DEKOCK, A ;
THACKERAY, MM .
SOLID STATE IONICS, 1994, 69 (01) :59-67
[3]  
Guohua L., 1996, J. Electrochem. Soc, V143, P178
[4]   THE CARBON LI1+XMN2O4 SYSTEM [J].
GUYOMARD, D ;
TARASCON, JM .
SOLID STATE IONICS, 1994, 69 (3-4) :222-237
[5]   Dissolution of spinel oxides and capacity losses in 4V Li/LixMn2O4 coils [J].
Jang, DH ;
Shin, YJ ;
Oh, SM .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (07) :2204-2211
[6]  
JEFFERY GH, 1989, VOGELS TXB QUANTITAT, P584
[7]   Preparation and electrochemical characterization of micron-sized spinel LiMn2O4 [J].
Jiang, ZP ;
Abraham, KM .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (05) :1591-1598
[8]   Synthesis and electrochemical studies of spinel phase LiMn2O4 cathode materials prepared by the Pechini process [J].
Liu, W ;
Farrington, GC ;
Chaput, F ;
Dunn, B .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (03) :879-884
[9]  
MACIDIN WJ, 1991, J POWER SOURCES, V34, P39
[10]   Chemical and magnetic characterization of spinel materials in the LiMn2O4-Li2Mn4O9-Li4Mn5O12 system [J].
Masquelier, C ;
Tabuchi, M ;
Ado, K ;
Kanno, R ;
Kobayashi, Y ;
Maki, Y ;
Nakamura, O ;
Goodenough, JB .
JOURNAL OF SOLID STATE CHEMISTRY, 1996, 123 (02) :255-266