人工晶体学报2017，Vol.46Issue(8)：1614-1618,5.
基于聚合反应制备的钛离子掺杂LiFePO4/C复合材料
Synthesis of Ti Ion Doped LiFePO4/C Composite Material Based on Polymerization Reaction
摘要
Abstract
Firstly, the precursor powder FePO4/PANI was synthesized by polymerization reaction.Then, the cathode material LiFePO4 was synthesized by using LiOH·H2O, FePO4/PANI and PVA as the raw materials.In addition the carbon-coated and Ti4+-doped material were synthesized simultaneously.These three samples were marked as LiFePO4, LiFePO4/C and LiFe0.96Ti0.02PO4/C.Their respective microstructure and characteristics were investigated via XRD, EDS and charge-discharge tests.The XRD patterns agree well with the standard LiFePO4 pattern and without amorphous carbon.Comparing with sample LiFePO4/C, LiFe0.96Ti0.02PO4/C has approximate electronic conductivity and higher Li+ diffusion coefficient.Ti4+ distributes in the lattice evenly.Thus, LiFe0.96Ti0.02PO4/C has better electrochemical performances than the other samples.It's initial discharge capacities are 158.7 mAh·g-1,153.3 mAh·g-1,147.6 mAh·g-1,136.4 mAh·g-1 and 123.5 mAh·g-1 at C/10、C/2、1C、3C and 5C rate respectively.The rate performance and potential stability of LiFe0.96Ti0.02PO4/C are favorable.关键词
锂离子电池/LiFe0.96Ti0.02PO4/C复合材料/聚合反应/碳包覆/掺杂Key words
Li-ion battery/LiFe0.96Ti0.02PO4/C composite/polymerization reaction/carbon-coated/doping分类
化学化工引用本文复制引用
李玲芳,曾武军,刘万峰..基于聚合反应制备的钛离子掺杂LiFePO4/C复合材料[J].人工晶体学报,2017,46(8):1614-1618,5.基金项目
湖南文理学院博士科研启动项目 （）
湖南文理学院"洞庭湖生态经济区建设与发展"湖南省协同创新中心(湘教通[2015]351号) （湘教通[2015]351号）
