Influence of conductive electroactive polymer polyaniline on electrochemical performance of LiMn1.95Al0.05O4 cathode for lithium ion batteries

Bulletin of materials science

Hari Om¹  Shao-Chang Han²  Chang-Ling Fan²  Ke-He Zhang² 

[1] Department of Materials Science and Engineering, Indian Institute of Technology, Kanpur 208 016, India$$Department of Materials Science and Engineering, Indian Institute of Technology, Kanpur 208 016, IndiaDepartment of Materials Science and Engineering, Indian Institute of Technology, Kanpur 208 016, India$$;College of Materials Science and Engineering, Hunan University, Changsha 410082, P. R. China$$College of Materials Science and Engineering, Hunan University, Changsha 410082, P. R. ChinaCollege of Materials Science and Engineering, Hunan University, Changsha 410082, P. R. China$$

关键词: Lithium ion batteries;    polyaniline;    LiMn1.95Al0.05O4;    percolation theory;    electrochemical performances.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Conductive electroactive polymer polyaniline is utilized to substitute conductive additive acetylene black in the LiMn_1.95Al_0.05O₄ cathode for lithium ion batteries. Results show that LiMn_1.95Al_0.05O₄ possesses stable structure and good performance. Percolation theory is used to optimize the content of conductive additive in cathode. It shows that the conductivity of cathode reaches its maximum value when the content of conductive additives is 15 wt%. This is in agreement with the results of charge and discharge experiments. The application of polyaniline can evidently enhance the electrochemical performance of cathode. The discharge capacity of cathode using 15 wt% polyaniline is 95.9 mAh g^-1 at the current density of 170 mA g^-1. The charge transfer resistance under different depths of discharge of cathode is much lower compared with the use of acetylene black. It can be concluded that the application of polyaniline in cathode can greatly improve the electrochemical performances of LiMn_1.95Al_0.05O₄ cathode.

【 授权许可】

Unknown