聚丙烯腈
钒
材料科学
氧化还原
流动电池
大气压力
电解质
电极
电池(电)
碳纤维
等离子体
无机化学
化学工程
复合材料
化学
冶金
气象学
聚合物
功率(物理)
复合数
工程类
物理化学
物理
量子力学
作者
Chien‐Hong Lin,Yu‐De Zhuang,Ding-Guey Tsai,Hwa‐Jou Wei,Ting‐Yu Liu
出处
期刊:Polymers
[MDPI AG]
日期:2020-06-18
卷期号:12 (6): 1372-1372
被引量:27
标识
DOI:10.3390/polym12061372
摘要
A high-performance carbon felt electrode for all-vanadium redox flow battery (VRFB) systems is prepared via low-temperature atmospheric pressure plasma treatment in air to improve the hydrophilicity and surface area of bare carbon felt of polyacrylonitrile and increase the contact potential between vanadium ions, so as to reduce the overpotential generated by the electrochemical reaction gap. Brunauer-Emmett-Teller (BET) surface area of the modified carbon felt is, significantly, five times higher than that of the pristine felt. The modified carbon felt exhibits higher energy efficiency (EE) and voltage efficiency (VE) in a single cell VRFB test at the constant current density of 160 mA cm−2, and also maintains good performance at low temperatures. Moreover, the cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) analysis results show that the resistance between electrolyte and carbon felt electrode decreased. As a result, owing to the increased reactivity of the vanadium ion on the treated carbon felt, the efficiency of the VRFB with the plasma-modified carbon felt is much higher and demonstrates better capacity under a 100-cycle constant current charge-discharge test.
科研通智能强力驱动
Strongly Powered by AbleSci AI