Improving electrochemical performance of LiMnPO4 by Zn doping using a facile solid state method

被引：21

作者：

Wang, Yourong ^{[1
]}

Chen, Yafang ^{[1
]}

Cheng, Siqing ^{[1
]}

He, Liangnian ^{[1
]}

机构：

[1] Wuhan Polytech Univ, Chem & Environm Engn Dept, Wuhan 430023, Hunan, Peoples R China

来源：

KOREAN JOURNAL OF CHEMICAL ENGINEERING | 2011年 / 28卷 / 03期

关键词：

Lithium Manganese Phosphates; Doping; Zinc; Lithium Ion Battery; Electrochemistry; LITHIUM-ION BATTERIES; ELECTRODE MATERIALS; HYDROTHERMAL METHOD; CATHODE MATERIAL; OLIVINE; TEMPERATURE; LIFEPO4; MN; FE;

D O I：

10.1007/s11814-010-0459-1

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Olivine structure LiMnPO4/C as cathode materials for Li-ion batteries were synthesized via a simple solid-state reaction. Improvement of the electrochemical performance of LiMnPO4/C cathode material was realized significantly by the method of doping Zn. The obtained LiMn0.95Zn0.05PO4/C electrode material was studied by the measurements of X-ray diffraction pattern, scanning electronic microscopy, electrochemical impedance spectroscopy and electrochemical performance. The results indicate that the LiMn0.95Zn0.05PO4/C materials exhibit discharge specific capacity of 140.2 mA h g(-1) at 0.02 C rate and better rate capability. These excellent results are elucidated by EIS test, which showed that there was the decrease of charge transfer resistance and faster lithium-ion diffusion in LiMnPO4/C cathode materials after Zn doping.

引用

页码：964 / 968

页数：5

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