Hydrothermal synthesis of carbon-coated lithium vanadium phosphate

被引：114

作者：

Chang, Caixian ^{[1
]}

Xiang, Jiangfeng ^{[1
]}

Shi, Xixi ^{[1
]}

Han, Xiaoyan ^{[1
]}

Yuan, Liangjie ^{[1
]}

Sun, Jutang ^{[1
]}

机构：

[1] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2008年 / 54卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Lithium vanadium phosphate; Carbon-coated; Cathode; Lithium-ion battery; Hydrothermal;

D O I：

10.1016/j.electacta.2008.07.038

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A novel hydrothermal synthesis was developed to prepare carbon-coated lithium vanadium phosphate (Li3V2(PO4)(3)) powders to be used as cathode material for Li-ion batteries. The structural morphological, and electrochemical properties were investigated by means of X-ray powder diffraction (XRD), thermogravimetry (TG), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and constant current charge-discharge cycling. This material exhibits high initial discharge capacity of 178, 173 and 172 mAh g(-1) at 0.1, 0.2 and 0.5C between 3.0 and 4.8V, respectively. Moreover, it displays good fast rate performance, which discharge capacities of 136, 132 and 127 mAh g(-1) can be delivered after 100 cycles between 3.0 and 4.8 V versus Li at a different rate of 1, 2 and 5 C, respectively. For comparison, the electrochemical properties of carbon-coated lithium vanadium phosphate prepared by traditional solid-state reaction (SSR) method are also studied. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：623 / 627

页数：5

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