| 石墨烯复合导电剂对LiNi0.5Co0.2Mn0.3O2动力学及电化学性能的影响 |
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| 引用本文： | 夏鼎峰,周苗苗,郭乾坤,胡顺,邹金,钟盛文.石墨烯复合导电剂对LiNi0.5Co0.2Mn0.3O2动力学及电化学性能的影响[J].有色金属科学与工程,2022,13(3):35-42. |
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| 作者姓名： | 夏鼎峰 周苗苗 郭乾坤 胡顺 邹金 钟盛文 |
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| 作者单位： | 1.江西理工大学材料冶金化学学部，江西 赣州 341000 |
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| 基金项目： | 国家自然科学基金资助项目5187041642 |
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| 摘 要： | 采用循环伏安、交流阻抗法对添加导电炭黑(SP)和导电炭黑复合石墨烯(SP+G)的两组不同导电剂，与LiNi0.5Co0.2Mn0.3O2组装成的电池进行锂离子脱嵌动力学研究，通过计算锂离子扩散系数探究不同导电剂对LiNi0.5Co0.2Mn0.3O2锂离子脱嵌动力学的影响。电化学性能测试表明，添加单一导电剂SP和复合导电剂SP+G的首次放电比容量分别为166、184 mAh/g，添加复合导电剂SP+G的放电比容量显著提升。
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| 关 键 词： | LiNi0.5Co0.2Mn0.3O2 锂离子扩散系数 石墨烯 导电炭黑 导电剂 |
| 收稿时间： | 2021-06-25 |
Effect of graphene composite conductor on kinetic and electrochemical properties of LiNi0.5Co0.2Mn0.3O2 |
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| Affiliation: | 1.Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China2.Jiangxi Key Laboratory of Power Battery and Materials, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China |
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| Abstract: | The lithium-ion deembedding kinetics study of two different groups of conductive agents adding conductive carbon black and conductive carbon black composite graphene as well as the battery assembled by LiNi0.5Co0.2Mn0.3O2 is conducted by cyclic voltammetry and AC impedance method. The lithium ion diffusion coefficient was calculated to explore the effect of different conductive agents on the LiNi0.5Co0.2Mn0.3O2 lithium ion deintercalation kinetics ring. The electrochemical performance tests show that the first discharge specific capacities of adding a single conductive carbon black conductive agent, as well as a composite conductive agent of graphene and conductive carbon black, are 166 and 184 mAh/g, respectively. The discharge specific capacity of graphene and conductive carbon black composite conductive agents is significantly improved. |
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