高等学校化学学报2017，Vol.38Issue(9)：1633-1638,6.DOI:10.7503/cjcu20170060
氮掺杂硅酸亚铁锂正极材料的制备及电化学性能
Preparation and Characterization of N-doped Li2FeSiO4/C Cathode Materials for Lithium Ion Batteries
摘要
Abstract
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, galvanosta-tic charge-discharge and electrochemical impedance spectra were used to investigate the effect of nitrogen do-ping on the characteristics of Li2 FeSiO4 . The results show that nitrogen does enter the cystal strucutre of Li2 FeSiO4 , 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％.关键词
锂离子电池/正极材料/硅酸亚铁锂/离子掺杂Key words
Lithium ion battery/Cathode material/Li2 FeSiO4/Ion-doping分类
化学化工引用本文复制引用
张冬,李亭亭,邱海龙,魏英进,王春忠,陈岗,岳惠娟..氮掺杂硅酸亚铁锂正极材料的制备及电化学性能[J].高等学校化学学报,2017,38(9):1633-1638,6.基金项目
吉林省科技厅基金(批准号:20150204030GX, 20160101320JC)资助. Supported by the Science and Technology Development Planning of Jilin Province, China( Nos.20150204030GX, 20160101320JC) . （批准号:20150204030GX, 20160101320JC）
