Effect of Zn doping on the performance of LiMnPO4 cathode for lithium ion batteries

被引：75

作者：

Fang, Haisheng ^{[1
,2
,3
]}

Yi, Huihua ^{[1
,2
,3
]}

Hu, Chenglin ^{[1
,2
,3
]}

Yang, Bin ^{[1
,2
,3
]}

Yao, Yaochun ^{[1
,2
,3
]}

Ma, Wenhui ^{[1
,2
,3
]}

Dai, Yongnian ^{[1
,2
,3
]}

机构：

[1] Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Peoples R China

[2] Kunming Univ Sci & Technol, Natl Engn Lab Vacuum Met, Kunming 650093, Peoples R China

[3] Kunming Univ Sci & Technol, Key Lab Nonferrous Met Vacuum Met Yunnan Prov, Kunming 650093, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2012年 / 71卷

关键词：

Lithium ion batteries; Cathode; Lithium manganese phosphate; Doping; Zinc; ELECTROCHEMICAL ACTIVITY; CATION SUBSTITUTION; MN; FE; MG; CO;

D O I：

10.1016/j.electacta.2012.03.160

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this work, effect of Zn doping on the performance of LiMnPO4 is revisited. Samples of pure and Zn-doped LiMnPO4 are synthesized by a new solid-state method, and their structure, morphology and electrochemical behavior are characterized and compared. The results reveal that a small amount of Zn doping (2 at.%) is highly beneficial for the performance of LiMnPO4 due to the reduced charge transfer resistance, the increased lithium ion diffusion and phase conversion, but this effect is remarkably traded off at a high level of Zn doping (10 at.%). Compared with LiMnPO4, LiMn0.98Zn0.02PO4 has a much higher capacity and a much better rate capability. After 2 at.% Zn doping, the discharge capacity increases from 101 to 139 mAh g(-1) at 0.1 C and 56 to 105 mAh g(-1) at 2 C. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：266 / 269

页数：4

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