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Mn3O4@MnS composite nanoparticles as cathode materials for aqueous rechargeable Zn ion batteries

Exploring high-capacity and stable cathode materials for aqueous rechargeable Zn ion batteries (ZIBs) is highly attractive but challenging. Herein, we present a kind of Mn3O4@MnS heterostructured nanoparticle as a robust ZIB cathode. These Mn3O4@MnS nanoparticles are facilely synthesized by in-situ transformation of MnO2 under sulfidation thermal treatment. Owing to the heterostructured architecture and improved electrical conductivity, the as-obtained Mn3O4@MnS nanoparticles afford a stable capacity of 128.3 mA h g[Formula: see text] at 2 mA cm[Formula: see text] and good stability of more than 65% capacity retention after 1000 cycles. Additionally, a remarkably energy density of 184.72 Wh kg[Formula: see text] is also achieved by the assembled Zn//Mn3O4@MnS battery. This work paves the way for constructing Mn-based heterostructures as high-performance cathodes in aqueous ZIBs.