The effect of NiO as graphitization catalyst on the structure and electrochemical performance of LiFePO4/C cathode materials

被引：16

作者：

Xu, Xing ^{[1
]}

Xu, Yunlong ^{[1
]}

Zhang, Huang ^{[2
]}

Ji, Mandi ^{[1
]}

Dong, Hui ^{[1
]}

机构：

[1] E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

[2] Katholieke Univ Leuven, Dept Mat Engn MTM, B-3001 Louvain, Belgium

来源：

ELECTROCHIMICA ACTA | 2015年 / 158卷

关键词：

Nickel oxide; modification; LiFePO4/C; graphitization; electrochemical performance; LITHIUM-ION BATTERIES; PHOSPHO-OLIVINES; ELECTRODE MATERIALS; CARBON; SPECTROSCOPY; CHEMISTRY; LIXFEPO4; POWDERS; ENERGY; METAL;

D O I：

10.1016/j.electacta.2015.01.170

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The NiO doped LiFePO4/C composite was synthesized by a simple solid state method. The structure and morphology of synthesized particles were characterized by XRD, Raman spectrum, SEM, TEM and EDS. Electrochemical performance of the pristine and nickel oxide modified samples was evaluated by galvanostatic charge-discharge test, CV, and EIS. The results indicate that NiO doped LiFePO4/Li type coin cell exhibits improved specific capacity and cycle stability, especially at high rates. Among all the modified samples, the 5.0% wt NiO doped sample shows the best electrochemical performance, which achieves a specific capacity of 129 mA h g(-1) at 1 C current rate due to the modest graphitization of carbon layer on the surface of LiFePO4 particles. The results indicate that nickel oxide modification is an effective way to improve the electrochemical performance of LiFePO4/C cathode materials for lithium ion batteries. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：348 / 355

页数：8

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