混料工艺对固相法合成LiNi0.5Mn1.5O4电化学性能的影响

材料导报, 2015, 29(4): 30-33. doi: 10.11896/j.issn.1005-023X.2015.04.008

混料工艺对固相法合成LiNi0.5Mn1.5O4电化学性能的影响

白钢印 ^1, , 肖方明 ^2, , 唐仁衡 ^3, , 肖志平 ^4, , 丁恒敏 ^5, , 王英 ^6,

1.昆明理工大学材料科学与工程学院,昆明 650093;广东省工业技术研究院(广州有色金属研究院)稀有金属研究所,广州510650

2.广东省工业技术研究院(广州有色金属研究院)稀有金属研究所,广州,510650

3.广东省工业技术研究院(广州有色金属研究院)稀有金属研究所,广州,510650

4.广东省工业技术研究院(广州有色金属研究院)稀有金属研究所,广州,510650

5.昆明理工大学材料科学与工程学院,昆明,650093

6.广东省工业技术研究院(广州有色金属研究院)稀有金属研究所,广州,510650

基金项目: 珠海市战略性新兴产业重大项目(珠科工贸信字[2011]29号) 广东省科技厅计划项目(2009A060800011) 珠海市产学研合作专项(2011A05101003)

关键词：锂离子电池 , 高电压材料 , 固相法 , 混料工艺 , 电化学性能

Effects of Mixing Process on the Electrochemical Properties of LiNi0.5Mn1.5O4 Synthesized by Solid-phase Method

Keywords： lithium-ion batteries , high voltage material , solid-phase method , mixing process , electrochemical properties

以Li2CO3、MnO2、NiO为原料,用固相法合成了5V尖晶石结构的LiNin5Mn1.5O4正极材料;并对合成的样品进行XRD、SEM及电化学性能测试,研究不同混料工艺对固相法合成的高电压正极材料LiNi0.Mn1.5O4电化学性能的影响.结果表明:采用高速球磨混料方式易获得具有优异电化学性能的样品;球磨时间一定,随着球磨转速增加,合成样品的比容量呈先增加后减小的趋势:转速为350r/min时合成的LiNi0.5Mn1.5O4的电化学性能最佳,0.2C倍率下,首次放电比容量为125.3mAh/g,100次充放电循环后放电比容量为118.7 mAh/g,容量保持率为94.7％.

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