Preparation and Characterization of N-doped Li2FeSiO4/C Cathode Materials for Lithium Ion Batteries

被引：2

作者：

Zhang Dong ^{[1
]}

Li Tingting ^{[1
]}

Qiu Hailong ^{[1
]}

Wei Yingjin ^{[1
]}

Wang Chunzhong ^{[1
]}

Chen Gang ^{[1
]}

Yue Huijuan ^{[2
]}

机构：

[1] Jilin Univ, Coll Phys, Minist Educ, Key Lab Phys & Technol Adv Batteries, Changchun 130012, Jilin, Peoples R China

[2] Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Jilin, Peoples R China

来源：

CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE | 2017年 / 38卷 / 09期

关键词：

Lithium ion battery; Cathode material; Li2FeSiO4; Ion-doping; ENHANCED ELECTROCHEMICAL PERFORMANCE; POSITIVE ELECTRODES; COMPOSITE;

D O I：

10.7503/cjcu20170060

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

N-doped lithium iron silicates(N-doped Li2FeSiO4, N-LFs) was prepared with sol. gel method. X-Ray diffraction, field emission scanning electron microscopy, X-ray photoelectron spectroscopy, galvanostatic charge. discharge and electrochemical impedance spectra were used to investigate the effect of nitrogen doping on the characteristics of Li2FeSiO4. The results show that nitrogen does enter the cystal strucutre of Li2FeSiO4, resulting in smaller particle size and better kinetic properties, as well as higher specific capacity and rate capability. The doped sample could deliver a specific capacity of 130 mA.h/g in the first discharge and retain 124 mA.h/g after 50 cycles with the retention of 95%.

引用

页码：1633 / 1638

页数：6

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