Liu, Yue;
Dai, Gaole;
Chen, Yuanyuan;
Wang, Ru;
Li, Huamei;
Shi, Xueliang;
Zhang, Xiaohong;
... Zhao, Yu; + view all
(2022)
Effective Design Strategy of Small Bipolar Molecules through Fused Conjugation toward 2.5 V Based Redox Flow Batteries.
ACS Energy Letters
, 7
pp. 1274-1283.
10.1021/acsenergylett.2c00198.
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Abstract
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.
| Type: | Article |
|---|---|
| Title: | Effective Design Strategy of Small Bipolar Molecules through Fused Conjugation toward 2.5 V Based Redox Flow Batteries |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acsenergylett.2c00198 |
| Publisher version: | https://doi.org/10.1021/acsenergylett.2c00198 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Redox reactions, Molecules, Molecular properties, Electrochemical cells, Electrolytes |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10146132 |
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