| 单晶LiNi0.83Co0.1Mn0.07O2正极材料的合成及电化学性能 |
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| 引用本文： | 郭乾坤,黄吉丽,周苗苗,胡顺,钟盛文.单晶LiNi0.83Co0.1Mn0.07O2正极材料的合成及电化学性能[J].有色金属科学与工程,2020,11(4):23-28. |
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| 作者姓名： | 郭乾坤 黄吉丽 周苗苗 胡顺 钟盛文 |
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| 作者单位： | a.江西理工大学，材料科学与工程学院，江西 赣州 341000 |
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| 摘 要： | 采用共沉淀-高温固相法合成单晶LiNi0.83Co0.1Mn0.07O2正极材料。采用XRD，SEM和恒流充放电等测试手段对材料的晶体结构、形貌和电化学性能等进行研究。测试结果表明，材料形成形貌良好的单晶颗粒，Li+/Ni2+离子混排程度较低，材料具有良好的a-NaFeO2层状结构。在2.75~4.3 V下，扣式电池0.1 C首次放电比容量达209.63 mAh/g，库仑效率为91.19%，0.2 C循环100次后容量保持率为100.09%。
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| 关 键 词： | 锂离子电池 LiNi0.83Co0.1Mn0.07O2 单晶 高首效 长循环 |
| 收稿时间： | 2020-05-24 |
Synthesis and electrochemical performance of single crystal LiNi0.83Co0.1Mn0.07O2 cathode material |
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| Affiliation: | a.School of Materials Science and Engineering; b. Jiangxi Key Laboratory of Power Battery and Materials, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, Chinab.School of Materials Science and Engineering; b. Jiangxi Key Laboratory of Power Battery and Materials, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China |
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| Abstract: | In this research, single-crystal LiNi0.83Co0.1Mn0.07O2 cathode material was synthesized by co-precipitation-high temperature solid phase method. Methods like XRD, SEM and constant current charge and discharge test were used to analyze the crystal structure, morphology and electrochemical performance of the materials. The test results show that the material forms single crystal particles with good morphology. And the material with low Li+/Ni2+ ion mixing degree has a good a-NaFeO2 layered structure. At 2.75~4.3 V, the 0.1 C first discharge specific capacity of the button cell reaches 209.63 mAh/g, the coulomb efficiency is 91.19%, and the capacity retention rate after 100 cycles of 0.2 C is 100.09%. |
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