不同金属离子价态的前驱体制备球形LiNi1/3Mn1/3Co1/3O2的性能比较

稀有金属材料与工程, 2009, 38(3): 500-505.

不同金属离子价态的前驱体制备球形LiNi1/3Mn1/3Co1/3O2的性能比较

常照荣 ^1, , 陈中军 ^2, , 吴锋 ^3, , 汤宏伟 ^4, , 朱志红 ^5, , 上官恩波 ^6,

1.河南师范大学,河南,新乡,453007

2.河南师范大学,河南,新乡,453007

3.北京理工大学,北京,100080

4.河南师范大学,河南,新乡,453007

5.河南师范大学,河南,新乡,453007

6.河南师范大学,河南,新乡,453007

基金项目: 国家自然科学基金(20671031)

关键词： Ni1/3Co1/3Mn1/3OOH , LiNi1/3Mn1/3Co1/3O2 , 锂离子电池 , 正极材料

Performance Comparison of Spherical LiNi1/3Co1/3Mn1/3O2 Prepared from the Precursor with Metai Ions of Different Valences

利用共沉淀法和控制结晶氧化法在不同条件下分别制备出低价态球形Ni1/3Co1/3Mn1/3(OH)2和高价态球形Ni1/3Co1/3Mn1/3OOH前驱体,并分别和LiOH·H2O在不同温度烧结合成出球形锂离子正极材料Li(Ni1/3Co1/3Mn1/3)O2.XPS分析表明,制备的高价态球形Ni1/3Co1/3Mn1/3OOH前驱体其过渡金属Ni、Co和Mn的价态分别是2+,3+,4+,XRD分析表明,高价态球形Ni1/3Co1/3Mn1/3OOH前驱体比低价态球形Ni1/3Co1/3Mn1/3(OH)2前驱体具有较高的活性,能够在低温下合成出Li(Ni1/3Co1/3Mn1/3)O2,而且制备的产物结晶度高,阳离子混排程度小,具有规整的层状a-NaFeO2结构.充放电实验表明,由高价态球形Ni1/3Co1/3Mn1/3OOH前驱体制备的Li(Ni1/3Col/3Mn1/3)O2具有优良的充放电性能和循环性能.

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