A high-performance aqueous iron–hydrogen gas battery. (March 2021)

• Record Type: Journal Article
• Authors: Zhu, Z.; Meng, Y.; Wang, M.; Yin, Y.; Chen, W.
• Is Part Of: Materials today energy. Volume 19(2021)
• Publication Date: 2021-03
• Subjects: Aqueous batteries -- Large-scale energy storage -- Hydrogen gas anode -- [Fe(CN)6]3–/[Fe(CN)6]4– -- Liquid redox molecules; Energy development -- Periodicals; Energy industries -- Periodicals; Power resources -- Periodicals; Energy policy -- Periodicals; Energy development; Energy industries; Energy policy; Power resources; Electronic journals; Periodicals; 621.042
• DOI: 10.1016/j.mtener.2020.100603
• Languages: English
• ISSNs: 2468-6069

Abstract

Abstract: Rechargeable hydrogen gas batteries are attracting great interest for emerging large-scale energy storage owing to their fast charge/discharge rates and excellent stability. Despite recent progress in the development of different hydrogen gas batteries, it is highly desirable to explore new cathodes for flourishing the hydrogen gas battery chemistries. Different from the previous hydrogen gas battery systems with solid or semi-solid cathode reactions, in this study, we propose and demonstrate an iron–hydrogen gas battery in a liquid cathode with low-cost [Fe(CN)6 ] 3– /[Fe(CN)6 ] 4– redox couple by pairing with the hydrogen gas anode. The designed iron–hydrogen gas battery exhibits a high energy efficiency of 93% with a discharge plateau of ~1.29 V at a current of 10 mA, an energy efficiency of 73% even at a high current of 60 mA and an ultra-stable cycling life of over 20000 cycles. This article highlights the significance of the deployment of liquid redox molecules as active species in hydrogen gas batteries, which provides an effective strategy to broaden the hydrogen gas battery systems for large-scale energy storage applications. Graphical abstract: Image 1 Highlights: An iron–hydrogen gas battery is reported by pairing a low-cost liquid cathode and a Pt-catalyzed hydrogen gas anode. Iron–hydrogen gas battery exhibits high energy efficiency of 93% with discharge voltage of 1.29 V at a current of 10 mA. Iron–hydrogen gas battery delivers a high current rate of 60 mA and an ultra-stable cycling life of over 20000 cycles.