Electrochemical performances of LiFe1-xMnxPO4 with high Mn content

被引：66

作者：

Zhang, Bin ^{[1
]}

Wang, Xiaojian ^{[1
]}

Li, Hong ^{[1
]}

Huang, Xuejie ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2011年 / 196卷 / 16期

关键词：

Olivine; Solid solution; Mesoporous; Overpotential; Cathode; Lithium ion batteries; MULTICOMPONENT OLIVINE; PHOSPHO-OLIVINES; PARTICLE-SIZE; LITHIUM; CATHODE; LIFEPO4; ELECTRODES; STORAGE; CARBON; MECHANISM;

D O I：

10.1016/j.jpowsour.2010.10.051

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：

A series of LiFe1-xMnxPO4/C materials with high Mn content (0.7 <= x <= 0.9) are synthesized by solid state reaction. The samples have mesoporous structure with an average pore size of 25 nm, particle size around 200-300 nm, crystalline size around 30 nm and specific areas around 50 m(2) g(-1). Their electrochemical performances are studied and the reversible capacity and rate performance decrease with the increase of Mn content. The redox potential of the Fe2+/Fe3+ and Mn2+/Mn3+ redox couple also shift accordingly. The overpotential value of the Mn2+/Mn3+ redox couple (80 mV) is close to that of the Fe2+/Fe3+ couple (60 mV) in all three compositions and shows a maximum (similar to 300 mV) in the regions of voltage transition. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：6992 / 6996

页数：5

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