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锂离子电池正极材料LiNi_1/3Co_1/3Mn_1/3O₂的合成及性能

Synthesis and Performance of Cathode Material LiNi_1/3Co_1/3Mn_1/3O₂ for Lithium-ion Batteries

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【Author】 ZHONG Shengkui1,2,LIU Letong1,JIANG Jiqiong1,2,LIU Jiequn1,2,WANG Jian1,LI Yang1,ZHU Feng1 (1 Department of Material and Chemical Engineering,Guilin University of Technology,Guilin 541004;2 Key Laboratory ofNew Processing Technology for Nonferrous Metals and Materials,Ministry of Education,Guilin University of Technology,Guilin 541004)

【机构】桂林工学院材料与化学工程系；桂林工学院有色金属及材料加工新技术教育部重点实验室；

【摘要】采用氢氧化物共沉淀法合成了Ni1/3Co1/3Mn1/3(OH)2前驱体,然后以Ni1/3Co1/3Mn1/3(OH)2和LiOH·H2O为原料,合成出了层状锂离子电池正极材料LiNi1/3Co1/3Mn1/3O2。通过XRD、SEM和电化学测试对LiNi1/3-Co1/3Mn1/3O2材料的结构、形貌及电化学性能进行了测试和表征。结果表明,800℃烧结12h所合成的样品粒度大小分布比较均匀,该材料以0.2C充放电,其首次放电容量为150mAh·g-1,循环30次后容量为137mAh·g-1。更多还原

【Abstract】 The cathode material LiNi1/3Co1/3Mn1/3O2 for lithium ion battery is prepared by the hydroxide co-precipitation method.X-ray diffraction(XRD),scanning electron microscopy(SEM) and electrochemical tests are used to characterize the structure,appearance and electrochemical performance of LiNi1/3Co1/3Mn1/3O2. It is found that the sample synthesized at 800℃ for 12h has homogenous distribution of particles. The electrochemical test shows that the initial discharge capacity of LiNi1/3Co1/3Mn1/3O2 powder is 150mAh·g-1 at the rate of 0.2C,and the capacity retains 137mAh·g-1 after 30 cycles.更多还原