AlPO_4包覆LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2的制备与电化学性能  

Preparation and Electrochemical Properties of AlPO_4-Coated LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2

作　　者：梁凯[1] 熊利芝[2] 唐明[1,3] 何则强[2] 

机构地区：[1]吉首大学化学化工学院,湖南吉首416000 [2]吉首大学生物资源与环境科学学院,湖南吉首416000 [3]长沙理工大学化学与环境工程系,湖南长沙410076

出　　处：《吉首大学学报（自然科学版）》2010年第2期89-93,104,共6页Journal of Jishou University(Natural Sciences Edition)

基　　金：国家自然科学基金(20873054);中国博士后科学基金(2005037700);湖南省自然科学基金(07JJ3014);湖南省教育厅科学研究项目(07A058);吉首大学科研项目(09JDY008)

摘　　要：采用高温固相法制备LiNi1/3Co1/3Mn1/3O2,溶胶-凝胶法制备AlPO4包覆LiNi1/3Co1/3Mn1/3O2材料(AlPO4-coated LiNi1/3Co1/3Mn1/3O2).并用XRD、SEM检测等对材料进行了表征,用X-射线衍射、扫描电镜分析以及电化学测试等手段对样品的微观结构、表面形貌和电化学性能进行了研究.结果表明:在AlPO4-coated LiNi1/3Co1/3Mn1/3O2中,AlPO4以无定形态包覆于的表面;AlPO4的存在,阻止了电极与电解质溶液之间的副反应,降低了电极的表面膜阻抗和电荷转移阻抗,加快了锂离子的扩散速度,使得LiNi1/3Co1/3Mn1/3O2的循环性能和倍率性能显著改善.LiNi1/3Co1/3Mn1/3O2 was synthesized by high temperature solid state method,and AlPO4-coated LiNi1/3Co1/3Mn1/3O2 was prepared by sol-gel using LiNi1/3Co1/3Mn1/3O2,Al(NO3)3·9H2O and H3PO4 as raw material.The microstructure,surface morphology and electrochemical properties were characterized by various electrochemical methods in combination with X-ray diffraction(XRD) and scanning electron microscope(SEM).Results show that amorphous AlPO4 is coated on the surface in AlPO4-coated LiNi1/3Co1/3Mn1/3O2.AlPO4 can m...

关 键 词：LINI1/3CO1/3MN1/3O2 磷酸铝 包覆 

分 类 号：TM912[电气工程—电力电子与电力传动]