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LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2)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LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2)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。
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 LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2) 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 LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2) 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.
作者
夏鼎峰
周苗苗
郭乾坤
胡顺
邹金
钟盛文
XIA Dingfeng;ZHOU Miaomiao;GUO Qiankun;HU Shun;ZOU Jin;ZHONG Shengwen(Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China;Jiangxi Key Laboratory of Power Battery andMaterials,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)
出处
《有色金属科学与工程》
CAS
北大核心
2022年第3期35-42,共8页
Nonferrous Metals Science and Engineering
基金
国家自然科学基金资助项目(5187041642)。
