| 无人机用锂离子电池正极材料Li1.20Mn0.54Ni0.13Co0.13O2的Mo6+掺杂改性研究 |
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| 引用本文： | 张亚锋,李宏伟,赵志坚.无人机用锂离子电池正极材料Li1.20Mn0.54Ni0.13Co0.13O2的Mo6+掺杂改性研究[J].无机盐工业,2021,53(11):81-85. |
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| 作者姓名： | 张亚锋 李宏伟 赵志坚 |
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| 作者单位： | 1.西京学院机械工程学院,陕西西安 7101232.河南理工大学化学化工学院 |
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| 摘 要： | 采用碳酸盐共沉淀法和高温烧结工艺将一定量的Mo6+掺杂到Li1.20Mn0.54Ni0.13Co0.13O2正极材料中。利用XRD、SEM、EDS和恒流测试仪研究Mo6+掺杂对Li1.20Mn0.54Ni0.13Co0.13O2正极材料的晶体结构、微观形貌和电化学性能的影响。结果显示,Li1.20Mn0.52Ni0.13Co0.13Mo0.02O2表现出更低的阳离子混排和优异的电化学性能。经过Mo6+掺杂后的正极,由于Li+高速的迁移速率,使得首次不可逆容量损失降低,并展现出更好的高倍率性能和优异的循环稳定性。在0.5C倍率下循环100周后,Li1.20Mn0.52Ni0.13Co0.13Mo0.02O2的容量保持率达到92.2%,远远大于Li1.20Mn0.54Ni0.13Co0.13O2的87.5%。另外,当放电倍率增大到5C时,Li1.20Mn0.54Ni0.13Co0.13O2的放电比容量要比Li1.20Mn0.52Ni0.13Co0.13Mo0.02O2低21.0 mA·h/g。因此,采用Mo6+掺杂改性Li1.20Mn0.54Ni0.13Co0.13O2正极材料,可以有效提高锂电池的循环保持率和高倍率放电性能。
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| 关 键 词： | 无人机 锂离子电池 Li1.20Mn0.54Ni0.13Co0.13O2 Mo6+掺杂 电化学性能 |
| 收稿时间： | 2020-06-25 |
Study on Mo6+ doping into Li1.20Mn0.54Ni0.13Co0.13O2 as cathode materials for Li-ion batteries applied in unmanned aerial vehicles |
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| ZHANG Yafeng,LI Hongwei,ZHAO Zhijian.Study on Mo6+ doping into Li1.20Mn0.54Ni0.13Co0.13O2 as cathode materials for Li-ion batteries applied in unmanned aerial vehicles[J].Inorganic Chemicals Industry,2021,53(11):81-85. |
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| Authors: | ZHANG Yafeng LI Hongwei ZHAO Zhijian |
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| Affiliation: | 1. Mechanical Engineering College,Xijing University,Xi′an 710123,China2. College of Chemistry and Chemical Engineering,Henan Polytechnic University |
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| Abstract: | A certain content of Mo6+ was doped into the Li1.20Mn0.54Ni0.13Co0.13O2 cathode materials via using the carbonate co-precipitation method and high temperature calcination process.The influences of doping Mo6+ on crystal structure, morphology and electrochemical properties of the cathode materials were investigated by XRD, SEM, EDS and galvanostatic charge-discharge tests.The results showed that the Li1.20Mn0.52Ni0.13Co0.13Mo0.02O2 exhibited lower cation mixing and excellent electro-chemical properties.Due to the high migration rate of Li+, the first irreversible capacity loss of the Mo6+ doped cathode was reduced, which led to better high rate performance and excellent cycle stability.After 100 cycles at 0.5C, the capacity retention rate of Li1.20Mn0.52Ni0.13Co0.13Mo0.02O2 was 92.2%, which was much higher than that of Li1.20Mn0.54Ni0.13Co0.13O2（87.5%）. In addition, when the discharge rate increased to 5C the discharge capacity of Li1.20Mn0.54Ni0.13Co0.13O2 was 21.0 mA·h/g lower than that of Li1.20Mn0.52Ni0.13Co0.13Mo0.02O2.Therefore, using Mo6+ doping Li1.20Mn0.54Ni0.13Co0.13O2 cathode materials could effectively improve the cycle retention and high rate discharge performance of lithium-ion battery. |
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| Keywords: | unmanned aerial vehicles Li-ion batteries Li1 20Mn0 54Ni0 13Co0 13O2 Mo6+ doping electrochemical property |
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