物理化学学报2012，Vol.28Issue(4)：823-830,8.DOI:10.3866/PKU.WHXB201202102
锂离子电池正极材料xLi2MnO3·(1-x)Li[Ni1/3Mn1/3Co1/3]O2的制备及表征
Preparation and Characterization of xLi2MnO3·(1-x)Li[Ni1/3Mn1/3Co1/3]O2Cathode Materials for Lithium-Ion Batteries
摘要
Abstract
The lithium rich cathode materials xLi2Mn03 (I-xJLifNii/sMn^CoioJOz (x=0.4, 0.5, 0.6) were successfully synthesized via sol-gel method with calcination in air. The transition metal acetate, lithium acetate, and citric acid were used as raw materials. The as-prepared materials were characterized by X-ray diffraction (XRD), scaning electron microscopy (SEM), and electrochemical tests. The material 0.5Li2MnO3' 0.5LiNiiraMni/3COio]O2, which was obtained after calcination at 900 °C for 12 h, exhibited fine microstructures and good electrochemical performance. When cycled at 2.0-4.8 V with a current density of 20 Ma-g"1 at room temperature, 0.5Li2MnO3'0.5LiNii/3lv1ni/3Coi/3]C>2 delivered a initial discharge specific capacity of 260.0 mAh-g"1, and maintained a capacity of 244.7 mAh-g"1 after 40 cycles (capacity retention 94.12%).关键词
锂离子电池/溶胶-凝胶/固溶体/正极材料/电化学性能Key words
Lithium-ion battery/ Sol-gel/ Solid solution/ Cathode material/ Electrochemical performance分类
化学化工引用本文复制引用
王昭,吴锋,苏岳锋,包丽颖,陈来,李宁,陈实..锂离子电池正极材料xLi2MnO3·(1-x)Li[Ni1/3Mn1/3Co1/3]O2的制备及表征[J].物理化学学报,2012,28(4):823-830,8.基金项目
国家重点基础研究发展规划(973) (2009CB220100),国家自然科学基金(51102018)和国家高技术研究发展计划(863) (SQ2010AA1123116001)资助项目 （973）
