Exploiting the synergistic effect of multiphase MnO2 stabilized by an integrated conducting network for aqueous zinc-ion batteries. (15th June 2022)

• Record Type: Journal Article
• Authors: Fu, Na; Zhao, Qingyuan; Xu, Yuting; Wang, Hongrui; Hu, Junping; Wu, Yuping; Yang, Linlin; Wu, Xiongwei; Zeng, Xianxiang
• Is Part Of: Materials chemistry frontiers. Volume 6:Number 14(2022)
• Page Start: 1956
• Page End: 1963
• Publication Date: 2022-06-15
• Subjects: Materials science -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1039/d2qm00254j
• Languages: English
• ISSNs: 2052-1529

Abstract

Abstract : An integrated conducting network resolves the poor conductivity and Mn dissolution of a multiphase MnO2 composite cathode for zinc-ion batteries. Abstract : δ-MnO2 is a typical oxide with a large layered structure for rapid Zn-ion (Zn 2+ ) 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 Zn 2+ 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.