基于钛酸锂负极和聚三苯胺正极的电池电容体系

苏秀丽; 董晓丽; 刘瑶; 王永刚; 余爱水

doi:10.13208/j.electrochem.171226

电化学 >

2018 , Vol. 24 >Issue 4: 324 - 331

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

研究论文

基于钛酸锂负极和聚三苯胺正极的电池电容体系

苏秀丽 ,
董晓丽 ,
刘瑶 ,
王永刚 ,
余爱水

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1. 复旦大学化学系袁，上海 200438；2. 上海电气集团股份有限公司中央研究院，上海 200070

收稿日期: 2017-12-26

修回日期: 2018-01-10

网络出版日期: 2021-01-11

基金资助

国家自然科学基金项目（No. 21473040）资助

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

SU Xiu-li ,
DONG Xiao-li ,
LIU Yao ,
WANG Yong-gang ,
YU Ai-shui

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1. Department of Chemistry, Fudan University, Shanghai 200438, China;
2. Shanghai Elect Group Co Ltd, Center Academy, Shanghai 200070, China

Received date: 2017-12-26

Revised date: 2018-01-10

Online published: 2021-01-11

Supported by

The National Natural Science Foundation of China(No. 21473040)

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摘要

由于高安全、高功率和超长循环寿命等优点，钛酸锂负极材料近年来得到了广泛关注，基于钛酸锂负极的高性能超级电池电容器和锂离子电池也成为近年来的研究热点. 本文采用化学氧化法制备了有机物正极材料聚三苯胺，并通过经典的电化学测试方法研究了其储能机理及相应的电极动力学过程. 研究结果表明，该有机物正极的储能机制主要是基于阴离子的吸脱附反应，并表现出85 mA·g^-1的可逆容量，且其动力学过程不受扩散控制，属于典型的赝电容行为. 将该正极与钛酸锂负极结合构成了新型的电池电容体系，并对其电化学性能进行了研究，结果表明该体系具有高功率特性，且能量密度高于传统的混合型超级电容器. 此外，本文还对该有机物正极的不足和实际应用中所面临的挑战做了初步分析.

关键词： 聚三苯胺; 钛酸锂; 混合型超级电容器; 锂离子电池

本文引用格式

苏秀丽 , 董晓丽 , 刘瑶 , 王永刚 , 余爱水 . 基于钛酸锂负极和聚三苯胺正极的电池电容体系[J]. 电化学, 2018 , 24(4) : 324 -331 . DOI: 10.13208/j.electrochem.171226

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.

Key words： polytriphenylamine; Li₄Ti₅O₁₂; hybrid Supercapacitor; Li-ion battery

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