电源技术2018，Vol.42Issue(2)：175-179,5.
富锂正极材料Li[Li0.2Mn0.54Ni0.13Co0.13]O2掺杂稀土La及其电化学性能
Electrochemical performance improvement of Li[Li0.2Mn0.54Ni0.13Co0.13]O2 lithium-ion cathode material by lanthanum doping
摘要
Abstract
The cathode materials Li[Li0.2Mn0.54Ni0.13Co0.13]O2 and Li[Li0.2Mn0.54-xNi0.13Co0.13Lax]O2 (x=0,0.01,0.03,0.05) were synthesized by alcohol assisted combustion method with LiNO3,Ni (NO3)2·6 H2O,Co (CH3COO)2·4 H2O and Mn-(CHaCOO)2·4 H2O as raw materials.The structure,morphology and electrochemical performance of the prepared samples were analyzed and characterized by XRD,SEM,EDS,galvanostatic charge-discharge and AC impedance.The experimental results show that the La doping has little effect on the stucture of the cathode material and all the four samples perform a typical layered structure of the α-NaFeO2.It show the layered structure of the cathode materials does not change after doping.The sample of the 3％ La doping performes the highest initial charge and discharge capacity which are 250.51 and 179.45 mAh/g respectively.When it's charged-discharged at 2.0-4.7 V,the initial coulombic efficiency of Li[Li0.2Mn0.54-xNi0.13Co0.13Lax]O2 (x=0.03) improves from 63.5％ (Li[Li0.2Mn0.54Ni0.13Co0.13]O2) to 71.6％ at 0.1 C(1 C=200 mA/g),and the discharge specific capacity keeps at 136.05 mAh/g after 50 cycles at 0.5 C.关键词
锂离子电池/正极材料/La掺杂/Li[Li0.2Mn0.54Ni0.13Co0.13]O2Key words
lithium-ion battery/cathode material/lanthanum doping/Li[Li0.2Mn0.54Ni0.13Co0.13]O2分类
信息技术与安全科学引用本文复制引用
闫印习,王娟,王亮亮,许云华..富锂正极材料Li[Li0.2Mn0.54Ni0.13Co0.13]O2掺杂稀土La及其电化学性能[J].电源技术,2018,42(2):175-179,5.基金项目
国家自然科学基金项目(51202179) （51202179）
教育部科学技术研究重点项目(212174) （212174）
陕西省自然科学基金项目(2013KJXX-57) （2013KJXX-57）
陕西省教育厅自然科学基金项目(11JK0826,12JS060) （11JK0826,12JS060）
金川-西安建筑科技大学预研究项目(X06071) （X06071）
