Enhanced Electrochemical Performance of LiFePO4 as Cathode for Lithium Ion Battery by Codoping with Titanium and Nitrogen

被引：6
|
作者：
Su, Wei [1 ]
Xu, Kaiqi [1 ,2 ]
Zhong, Guobin [1 ]
Wei, Zengfu [1 ]
Wang, Chao [1 ]
Meng, Yuezhong [2 ]
机构：
[1] Guangdong Power Grid Co Ltd, Elect Power Res Inst, Guangzhou 510080, Guangdong, Peoples R China
[2] Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Key Lab Low Carbon Chem & Energy Conservat Guangd, Guangzhou 510275, Guangdong, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2017年 / 12卷 / 08期
关键词：
Lithium ion batteries; Cathode; LiFePO4; Codoping; CARBOTHERMAL REDUCTION METHOD; PHOSPHO-OLIVINES; ELECTRODES; TI4+; SUBSTITUTION; LIPON; FILMS; IRON;
D O I：
10.20964/2017.08.13
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Titanium and nitrogen codoped LiFePO4 was synthesized via a simple solid state reaction using TiN as the dopant source. The morphology, structure, valence state and electrochemical performance of all the samples were investigated and compared with the undoped LiFePO4. The results showed that the codoped samples maintained an olivine structure with modified lattice parameters and exhibited a prominent improved electrochemical performance. Among all the codoped samples, LiFe0.94Ti0.04PO4 sigma N0.04 showed the best rate capability of 108.1 mAh g(-1) even at a high rate of 5 C and exhibited a capacity retention of about 94% after 100 cycles at 1 C.
引用
收藏
页码：6930 / 6939
页数：10
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