Effective Design Strategy of Small Bipolar Molecules through Fused Conjugation toward 2.5 V Based Redox Flow Batteries.
Effective Design Strategy of Small Bipolar Molecules through Fused Conjugation toward 2.5 V Based Redox Flow Batteries.
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小型双极分子的有效设计策略通过融合的结合朝向2.5 V的氧化还原流量电池。
DOI:
10.1021/acsenergylett.2c00198
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发表时间:
2022-04-08
影响因子:
22
通讯作者:
Zhao, Yu
中科院分区:
文献类型:
--
作者:
Liu, Yue;Dai, Gaole;Chen, Yuanyuan;Wang, Ru;Li, Huamei;Shi, Xueliang;Zhang, Xiaohong;Xu, Yang;Zhao, Yu
Using bipolar redox-active molecules (BRMs) as active materials is a practical way to address electrolyte crossover and resultant unpredictable side reactions in redox-flow batteries. However, the development of BRMs is greatly hindered by difficulties in finding new molecules from limited redox-active moieties and in achieving high cell voltage to compete with existing flow battery chemistries. This study proposes a strategy for design of high-voltage BRMs using fused conjugation that regulates the redox potential of integrated redox-active moieties. As a demonstration, quaternary N and ketone redox moieties are used to construct a new BRM that shows a prominent voltage gap with good electrochemical stability. A symmetrical redox-flow cell based on this molecule exhibits a high voltage of 2.5 V and decent cycling stability. This study provides a general strategy for designing new BRMs that may enrich the cell chemistries of organic redox-flow batteries.
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