High-voltage pH-decoupling aqueous redox flow batteries for future energy storage

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL Current Opinion in Electrochemistry Pub Date : 2025-02-01 DOI:10.1016/j.coelec.2024.101633

Xiaoyu Huo , Xingyi Shi , Qing Wang , Yikai Zeng , Liang An

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Abstract

Aqueous redox flow batteries (ARFBs) have attracted lots of attention as powerful and durable technologies for sustainable energy storage. However, the wide adoptions of ARFBs still face the challenge of restrained voltage output due to the limited electrochemical stable window of water. As a prospective solution, the pH-decoupling strategy, which uses positive and negative electrolytes with different pH values, has been proven to overcome the thermodynamic limit of water and expand the operational voltage range of the ARFBs. This review outlines the recent advancements in different types of pH-decoupling ARFBs, including the two-chamber system, three-chamber system, and decoupled system with independent pH recovery function. The merits and technical challenges for being highlighted to assess the application potentials of each system design. Furthermore, insights for future research directions are provided to guide further system enhancement and promote the development of stable pH-decoupling ARFBs.

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来源期刊

Current Opinion in Electrochemistry Chemistry-Analytical Chemistry

CiteScore

14.00

自引率

5.90%

发文量

272

审稿时长

73 days

期刊介绍： The development of the Current Opinion journals stemmed from the acknowledgment of the growing challenge for specialists to stay abreast of the expanding volume of information within their field. In Current Opinion in Electrochemistry, they help the reader by providing in a systematic manner: 1.The views of experts on current advances in electrochemistry in a clear and readable form. 2.Evaluations of the most interesting papers, annotated by experts, from the great wealth of original publications. In the realm of electrochemistry, the subject is divided into 12 themed sections, with each section undergoing an annual review cycle: • Bioelectrochemistry • Electrocatalysis • Electrochemical Materials and Engineering • Energy Storage: Batteries and Supercapacitors • Energy Transformation • Environmental Electrochemistry • Fundamental & Theoretical Electrochemistry • Innovative Methods in Electrochemistry • Organic & Molecular Electrochemistry • Physical & Nano-Electrochemistry • Sensors & Bio-sensors •