流动电池
氧化还原
电池(电)
化学工程
复合数
膜
锌
材料科学
电化学
化学
无机化学
电极
复合材料
有机化学
量子力学
生物化学
物理
工程类
物理化学
功率(物理)
作者
Noufal Merukan Chola,Priyanka P. Bavdane,Noufal Merukan Chola
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2022-10-01
卷期号:169 (10): 100542-100542
被引量:6
标识
DOI:10.1149/1945-7111/ac99a3
摘要
Zinc-based energy storage is increasingly getting attention owing to its outstanding characteristics over to the other systems. Their high abundance, user-friendliness, environmental benignity, and low reduction potential which can avoid unwanted hydrogen evolution are some of the attractive features. Appropriate membrane selection for the zinc-based redox flow battery is challenging. Herein we report the composite of SPEEK (sulfonated polyether ether ketones) with covalent organic frameworks (COF) as a potential membrane for zinc-based redox flow battery. Biphenyl-based knitting type COF was prepared, post sulfonated and blended with SPEEK. In a Zn/I 2 redox flow battery system, the discharge capacity was found to be 19.8 AhL −1 , 17.4 AhL −1 , 15.1 AhL −1 for 20%, 15%, 10% SCOF loading respectively against 14.5 AhL −1 for pristine SPEEK at 20 mAcm −2 current density. The capacity was improved by about 36% higher than the neat SPEEK membrane. This improvement in the battery performance might be due to the higher ionic conductivity and hydrophilicity after SCOF loading. We found that the 15% loading was the maximum limit for the battery performance, beyond which the energy efficiency was found to be fading, which is due to the excessive dendrite growth on the membrane surface.
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