Decoupling Activation and Transport by Electron-Regulated Atomic-Bi Harnessed Surface-to-Pore Interface for Vanadium Redox Flow Battery

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Article number2305415
Journal / PublicationAdvanced Materials
Volume36
Issue number6
Online published22 Aug 2023
Publication statusPublished - 8 Feb 2024

Abstract

Vanadium redox flow battery (VRFB) promises a route to low-cost and grid-scale electricity storage using renewable energy resources. However, the interplay of mass transport and activation processes of high-loading catalysts makes it challenging to drive high-performance density VRFB. Herein, a surface-to-pore interface design that unlocks the potential of atomic-Bi-exposed catalytic surface via decoupling activation and transport is reported. The functional interface accommodates electron-regulated atomic-Bi catalyst in an asymmetric Bi─O─Mn structure that expedites the V3+/V2+ conversion, and a mesoporous Mn3O4 sub-scaffold for rapid shuttling of redox-active species, whereby the site accessibility is maximized, contrary to conventional transport-limited catalysts. By in situ grafting this interface onto micron-porous carbon felt (Bi1-sMn3O4-CF), a high-performance flow battery is achieved, yielding a record high energy efficiency of 76.72% even at a high current density of 400 mA cm−2 and a peak power density of 1.503 W cm−2, outdoing the battery with sMn3O4-CF (62.60%, 0.978 W cm−2) without Bi catalyst. Moreover, this battery renders extraordinary durability of over 1500 cycles, bespeaking a crucial breakthrough toward sustainable redox flow batteries (RFBs). © 2023 Wiley-VCH GmbH.

Research Area(s)

  • activation, electron-regulated atomic-Bi catalysts, mass transport, surface-to-pore interfaces, vanadium redox flow batteries

Citation Format(s)

Decoupling Activation and Transport by Electron-Regulated Atomic-Bi Harnessed Surface-to-Pore Interface for Vanadium Redox Flow Battery. / Zhang, Xiangyang; Valencia, Agnes; Li, Weilu et al.
In: Advanced Materials, Vol. 36, No. 6, 2305415, 08.02.2024.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review