Hybrid Battery-Capacitor System based on LiTi₅O₁₂ Anode and PTPAn Cathode

Authors

Xiu-li SU, 1. Department of Chemistry, Fudan University, Shanghai 200438, China; 2. Shanghai Elect Group Co Ltd, Center Academy, Shanghai 200070, China;
Xiao-li DONG, 1. Department of Chemistry, Fudan University, Shanghai 200438, China;
Yao LIU, 1. Department of Chemistry, Fudan University, Shanghai 200438, China;
Yong-gang WANG, 1. Department of Chemistry, Fudan University, Shanghai 200438, China;
Ai-shui YU, 1. Department of Chemistry, Fudan University, Shanghai 200438, China;

Corresponding Author

Yong-gang WANG(ygwang@fudan.edu.cn);
Ai-shui YU(asyu@fudan.edu.cn)

Abstract

Owing to its high safe, high rate and long life characteristics, lithium titanate (Li₄Ti₅O₁₂) anode material has attracted extensive attention in recent years, and many efforts are being made to develop the Li₄Ti₅O₁₂ based high performance hybrid supercapacitors and Li-ion batteries. Herein, we prepared the organic cathode material polytriphenylamine (PTPAn) through chemical oxidation and polymerization of triphenylamine (TPAn), and investigated its charge storage mechanism and electrode kinetics withthe typical electrochemical methods in an organic electrolyte. It was demonstrated that the PTPAn exhibited the reversible capacity of 85 mA·g^-1. The charge storage depended on the reversible adsorption/desorption of anion, which is not controlled by the diffusion process, and thus, can be considered as the pseudocapacitive behavior. Then, the PTPAn cathode was coupled with the Li₄Ti₅O₁₂ anode to form a hybrid capacitor/battery system with high power and improved energy density. Finally, the inherent drawback and the challenge for practical application of such an organic cathode are briefly discussed.

Graphical Abstract

Keywords

polytriphenylamine, Li4Ti5O12, hybrid Supercapacitor, Li-ion battery

DOI Link

https://doi.org/10.13208/j.electrochem.171226

Publication Date

2018-08-28

Online Available Date

2018-01-30

Revised Date

2018-01-10

Received Date

2017-12-26

Recommended Citation

Xiu-li SU, Xiao-li DONG, Yao LIU, Yong-gang WANG, Ai-shui YU. Hybrid Battery-Capacitor System based on LiTi₅O₁₂ Anode and PTPAn Cathode[J]. Journal of Electrochemistry, 2018 , 24(4): 324-331.
DOI: 10.13208/j.electrochem.171226
Available at: https://jelectrochem.xmu.edu.cn/journal/vol24/iss4/3