| 引用本文: | 吕艳卓,王霄鹤,刘建武,王振波,柯克.LiNi0.4Co0.2Mn0.4O2与LiMn2O4共混正极材料电化学性能[J].哈尔滨工业大学学报,2016,48(8):161.DOI:10.11918/j.issn.0367-6234.2016.08.027 |
| Lü Yanzhuo,WANG Xiaohe,LIU Jianwu,WANG Zhenbo,KE Ke.Electrochemical performances of the co-mixed LiNi0.4Co0.2Mn0.4O2 and LiMn2O4 as the positive-electrode material of lithium ion battery[J].Journal of Harbin Institute of Technology,2016,48(8):161.DOI:10.11918/j.issn.0367-6234.2016.08.027 |
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| LiNi0.4Co0.2Mn0.4O2与LiMn2O4共混正极材料电化学性能 |
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吕艳卓1,2,3,王霄鹤2,刘建武2,王振波1,柯克1,3
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(1.哈尔滨工业大学 化工与化学学院,哈尔滨150001; 2.哈尔滨工程大学 材料科学与化学工程学院, 哈尔滨150001; 3.超威电源有限公司,浙江 长兴313100)
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| 摘要: |
| 为开发具有优良循环性能和安全性能的大型锂离子电池的正极材料，将不同比例的LiNi0.4Co0.2Mn0.4O2和LiMn2O4材料进行共混，研究了LiNi0.4Co0.2Mn0.4O2和LiMn2O4共混以及共混比例(10∶0、8∶2、7∶3、6∶4、5∶5、0∶10)对锂离子电池的首次放电性能、循环性能和倍率性能以及交流阻抗和循环伏安曲线的影响，并采用扫描电镜对电极材料进行了表征.研究结果表明，共混比例会影响材料的电化学性能，8∶2，7∶3和6∶4配比的混合材料的体积比容量、循环性能和倍率性能要好于纯LiNi0.4Co0.2Mn0.4O2和LiMn2O4材料.其中，8∶2配比的材料性能最好.
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| 关键词: LiNi0.4Co0.2Mn0.4O2 LiMn2O4 共混正极材料 锂离子电池 电化学性能 |
| DOI：10.11918/j.issn.0367-6234.2016.08.027 |
| 分类号:O646 |
| 文献标识码:A |
| 基金项目:国家自然科学基金青年基金(21203040);中国博士后基金面上项目(2014M561357); 浙江省博士后科研项目择优资助资金(zj140288); 黑龙江省自然科学基金(B201201) |
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| Electrochemical performances of the co-mixed LiNi0.4Co0.2Mn0.4O2 and LiMn2O4 as the positive-electrode material of lithium ion battery |
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Lü Yanzhuo1,2,3, WANG Xiaohe2, LIU Jianwu2,WANG Zhenbo1, KE Ke1,3
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(1.School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China; 2.College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China; 3.Chaowei Power Co., LTD, Changxing 313100, Zhejiang, China)
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| Abstract: |
| In order to explore the positive material with excellent cycling ability and good safety, the effects of co-mixed ratios(10∶0、8∶2、7∶3、6∶4、5∶5、0∶10) of LiNi0.4Co0.2Mn0.4O2 with LiMn2O4 as the positive material of lithium ion battery on the first discharging properties, cycling abilities, rate capabilities, impedance spectroscopy and cyclic voltammetry were investigated. The co-mixed electrode materials were also characterized by SEM. The results indicated that the co-mixed ratio affected the electrochemical performances of the co-mixed materials. The materials with the ratios of 8∶2, 7∶3 and 6∶4 showed higher specific volumetric capacity, better cyclic and rate performances than that of LiNi0.4Co0.2Mn0.4O2 and LiMn2O4 materials. The co-mixed material with the ratio of 8∶2 is the best.
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| Key words: LiNi0.4Co0.2Mn0.4O2 LiMn2O4 co-mixed positive-electrode material lithium-ion battery electrochemical performances |
