Issue 14, 2022

Exploiting the synergistic effect of multiphase MnO2 stabilized by an integrated conducting network for aqueous zinc-ion batteries

Abstract

δ-MnO2 is a typical oxide with a large layered structure for rapid Zn-ion (Zn2+) accommodation capability and widely studied as a cathode material in aqueous Zn-ion batteries (ZIBs). However, structural instability and Mn dissolution are two major obstacles for its application in the fabrication of ZIBs with a long cycle life. Herein, a “three-in-one” strategy was applied to design a multiphase MnO2-based composite (δ-MnO2 and α-MnO2) on carbon cloth through constructing an integrated continuous conducting network of poly(3,4-ethylenedioxythiophene) (PEDOT), and the aforementioned issues in δ-MnO2 were tackled without compromising on rapid Zn2+ transportation, which originates from the excellent hydrophilicity and the synergism of multiphase MnO2 and an integrated conducting network. When applied as the cathode material for aqueous ZIBs, a large capacity release of 360 mA h g−1 at 0.1C and impressive durability over 860 cycles with 78% capacity retention at 1C were achieved, representing a promising cathode structure design for MnO2 based cathodes.

Graphical abstract: Exploiting the synergistic effect of multiphase MnO2 stabilized by an integrated conducting network for aqueous zinc-ion batteries

Supplementary files

Article information

Article type
Research Article
Submitted
21 Mar 2022
Accepted
22 May 2022
First published
23 May 2022

Mater. Chem. Front., 2022,6, 1956-1963

Exploiting the synergistic effect of multiphase MnO2 stabilized by an integrated conducting network for aqueous zinc-ion batteries

N. Fu, Q. Zhao, Y. Xu, H. Wang, J. Hu, Y. Wu, L. Yang, X. Wu and X. Zeng, Mater. Chem. Front., 2022, 6, 1956 DOI: 10.1039/D2QM00254J

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