A high potential biphenol derivative cathode: toward a highly stable air-insensitive aqueous organic flow battery

Wanqiu Liu; Ziming Zhao; Tianyu Li; Shenghai Li; Huamin Zhang; Xianfeng Li

doi:10.1016/j.scib.2020.08.042

A high potential biphenol derivative cathode: toward a highly stable air-insensitive aqueous organic flow battery

Sci Bull (Beijing). 2021 Mar 15;66(5):457-463. doi: 10.1016/j.scib.2020.08.042. Epub 2020 Sep 1.

Authors

Wanqiu Liu¹, Ziming Zhao², Tianyu Li³, Shenghai Li⁴, Huamin Zhang³, Xianfeng Li⁵

Affiliations

¹ Division of Energy Storage, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; University of Chinese Academy of Sciences, Beijing 100039, China.
² Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China; University of Science and Technology of China, Hefei 230026, China.
³ Division of Energy Storage, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
⁴ Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China; University of Science and Technology of China, Hefei 230026, China. Electronic address: lsh@ciac.ac.cn.
⁵ Division of Energy Storage, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. Electronic address: lixianfeng@dicp.ac.cn.

PMID: 36654183
DOI: 10.1016/j.scib.2020.08.042

Abstract

Aqueous organic flow batteries have attracted dramatic attention for stationary energy storage due to their resource sustainability and low cost. However, the current reported systems can normally be operated stably under a nitrogen or argon atmosphere due to their poor stability. Herein a stable air-insensitive biphenol derivative cathode, 3,3',5,5'-tetramethylaminemethylene-4,4'-biphenol (TABP), with high solubility (>1.5 mol L^-1) and redox potential (0.91 V vs. SHE) is designed and synthesized by a scalable one-step method. Paring with silicotungstic acid (SWO), an SWO/TABP flow battery shows a stable performance of zero capacity decay over 900 cycles under the air atmosphere. Further, an SWO/TABP flow battery manifests a high rate performance with an energy efficiency of 85% at a current density of 60 mA cm^-2 and a very high volumetric capacity of more than 47 Ah L^-1. This work provides a new and practical option for next-generation practical large-scale energy storage.

Keywords: Biphenol; Energy storage; Organic flow batteries.