Electrochemical behaviour of LiMyMn2-yO4 (M = Cu, Cr; 0 ≤ y ≤ 0•4)

被引：24

作者：

Thirunakaran, R ^{[1
]}

Babu, BR ^{[1
]}

Kalaiselvi, N ^{[1
]}

Periasamy, P ^{[1
]}

Kumar, TP ^{[1
]}

Renganathan, NG ^{[1
]}

Raghavan, M ^{[1
]}

Muniyandi, N ^{[1
]}

机构：

[1] Cent Electrochem Res Inst, Adv Batteries Div, Karaikkudi 630006, Tamil Nadu, India

来源：

BULLETIN OF MATERIALS SCIENCE | 2001年 / 24卷 / 01期

关键词：

chromium doped LiMn(2)O(4); copper doped LiMn(2)O(4); reversible capacity; cyclability; spinel structure;

D O I：

10.1007/BF02704840

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Spinel lithium manganese oxide, LiMn(2)O(4), is beset with problems of capacity fade upon repeated cycling. The loss in capacity upon cycling is attributable to Jahn-Teller distortion and manganese dissolution in the electrolyte in the charged state. One way to circumvent this capacity fade is to introduce other 3d transition metal ions in the LiMn(2)O(4) lattice, In this paper, we report on the effect of partial substitution of manganese in the LiMn(2)O(4) phase with copper (II) and chromium (III) ions. It has been shown that the higher octahedral stabilization energy of trivalent chromium imparts greater structural stability to chromium-doped LiMn(2)O(4) spinels. Both copper and chromium reduce the capacity of the spinel in the 4 V region. In terms of its good reversible capacity and ability to sustain cycling with minimal capacity fade, LiCr(0.1)Mn(1.9)O(4) may he considered as a potential cathode material for lithium rechargeable cells.

引用

页码：51 / 55

页数：5

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