氧化还原
流动电池
二亚胺
材料科学
法拉第效率
电池(电)
阳极
电解质
有机自由基电池
分子
化学工程
纳米技术
化学
电极
有机化学
物理化学
苝
热力学
物理
功率(物理)
工程类
冶金
作者
Gabriel Sikukuu Nambafu,Ernest Pahuyo Delmo,Usman Bin Shahid,Cheng Zhang,Qing Chen,T.S. Zhao,Ping Gao,Khalil Amine,Minhua Shao
出处
期刊:Nano Energy
[Elsevier]
日期:2022-01-15
卷期号:94: 106963-106963
被引量:19
标识
DOI:10.1016/j.nanoen.2022.106963
摘要
Non-aqueous redox flow batteries based on total organic electrolytes, consisting of earth-abundant elements, i.e., C, H, N, O, are regarded as a promising technology for sustainable and large-scale energy storage. In particular, bipolar redox-active organic materials (BROMs) are distinctly fascinating as electroactive species because they have multiple oxidation states and can undergo multiple redox processes. By virtue of this unique characteristic, BROMs can be utilized as both anolyte and catholyte in symmetric flow batteries, consequently, helping alleviate cross-contamination issues. Herein we report an all-organic symmetric redox flow battery based on diimide molecule as a bipolar electroactive material. The potential interval between the cathodic peak and the inner and outer anodic peaks led to a promising cell voltage of 2.22 V. The symmetric battery can be operated at a current density of 20 mA cm−2, with a coulombic efficiency of 90% for over 100 cycles. This work proposes an alternative approach to designing multi-electron organic redox active materials to facilitate the advancement of high-density symmetric flow batteries.
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