Issue 11, 2024

Unlock flow-type reversible aqueous Zn–CO2 batteries

Abstract

Metal–CO2 batteries, which use CO2 as the active species at cathodes, are particularly promising, but device design for mass-producible CO2 reduction and energetic power supply lag behind, limiting their potential benefits. In this study, an aqueous reversible flow-type Zn–CO2 battery using a Pd/SnO2@C cathode catalyst has been assembled and demonstrates an ultra-high discharge voltage of 1.38 V, a peak power density of 4.29 mW cm−2, high-energy efficiency of 95.64% and remarkable theoretical energy density (827.3 W h kg−1). In the meantime, this optimized system achieves a high formate faradaic efficiency of 95.86% during the discharge process at a high rate of 4.0 mA cm−2. This energy- and chemical-conversion technology could store and provide electricity, eliminate CO2 and produce valuable chemicals, addressing current energy and environment issues simultaneously.

Graphical abstract: Unlock flow-type reversible aqueous Zn–CO2 batteries

Supplementary files

Article information

Article type
Communication
Submitted
29 Feb 2024
Accepted
27 Mar 2024
First published
27 Mar 2024

Mater. Horiz., 2024,11, 2657-2666

Unlock flow-type reversible aqueous Zn–CO2 batteries

M. K. Aslam, H. Wang, Z. Nie, S. Chen, Q. Li and J. Duan, Mater. Horiz., 2024, 11, 2657 DOI: 10.1039/D4MH00219A

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