Improved Electrochemical Properties of Conducting AZO-Coated Spinel LiMn2O4 at 55 °C

被引：0

作者：

Xia Bing-Bo ^{[1
]}

Qiu Guang-Chao ^{[1
]}

Sun Hong-Dan ^{[1
]}

Fang Guo-Qing ^{[2
]}

Liu Wei-Wei ^{[2
]}

Zhang Rui-Xue ^{[1
]}

Wang Hong-Yu ^{[2
]}

Li De-Cheng ^{[1
]}

机构：

[1] Soochow Univ, Inst Chem Power Sources, Key Lab Lithium Ion Battery Mat Jiangsu Prov, Suzhou 215006, Jiangsu, Peoples R China

[2] Changzhou Inst Energy Storage Mat & Devices, Changzhou 213003, Jiangsu, Peoples R China

来源：

CHINESE JOURNAL OF INORGANIC CHEMISTRY | 2014年 / 30卷 / 04期

关键词：

lithium-ion battery; cathode material; sal-gel method; LiMn2O4; Mn dissolution; conducting AZO; coated; RECHARGEABLE LITHIUM BATTERIES; JAHN-TELLER DISTORTION; AL-DOPED ZNO; CATHODE MATERIAL; MANGANESE; LICOO2; 55-DEGREES-C; PERFORMANCE; ELECTRODES; STABILITY;

D O I：

暂无

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

To improve the electrochemical properties of spinel LiMn2O4 cathode material, LiMn2O4 coated with Al doped ZnO (AZO) was prepared by sol-gel method. The effects of AZO coating on the structural and electrochemical properties were investigated by XRD, SEM, EDS, TEM, EIS, ICP-AES and charge-discharge test. The results demonstrate that AZO coating can effectively obstruct the direct contact between the cathode electrode and electrolyte and suppress the dissolution of manganese into the electrolyte. It is shown that 1.5wt% AZO-coated LiMn2O4 delivers a capacity of 114 mAh.g(-1) with a capacity retention of 95.4% after 100 cycles operated at 1C rate and 55 degrees C, which is obviously higher than that of bare LiMn2O4 (70.6%). Moreover, 1.5wt% AZO-coated LiMn2O4 presents an excellent high-rate capability with the discharge capacity of 99 mAh.g(-1) at 10C rate.

引用

页码：725 / 732

页数：8

共 33 条

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