Facile Construction of Zn‐Doped Mn3O4−MnO2 Vertical Nanosheets for Aqueous Zinc‐Ion Battery Cathodes

Aqueous rechargeable batteries with good electrochemical performances have been considered as compelling alternatives in miniaturized energy storage units due to their small‐size, better safety, greener manufacturing condition, and easy‐to‐recycle process. Herein, a binder‐free manganese oxide (MnOx...

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Bibliographic Details
Published in:ChemElectroChem 2022-09, Vol.9 (18), p.n/a
Main Authors: Ko, Wen Yin, Lubis, Andre Lammiduk, Wang, Ho Ya, Wu, Tung Ching, Lin, Shin Ting, Lin, Kuan Jiuh
Format: Article
Language:English
Subjects:
Alternative energy sources
Batteries
cathode
Cathodes
Doping
Electrical resistivity
Electrode materials
Energy storage
Ion currents
Manganese dioxide
Manganese oxides
Metal foams
metal-doped
Nanocomposites
nanosheet
Nanosheets
Nanostructure
Rechargeable batteries
Storage systems
Storage units
System effectiveness
Zinc
Zinc-ion battery
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Summary:Aqueous rechargeable batteries with good electrochemical performances have been considered as compelling alternatives in miniaturized energy storage units due to their small‐size, better safety, greener manufacturing condition, and easy‐to‐recycle process. Herein, a binder‐free manganese oxide (MnOx), comprising of MnO2 and Mn3O4 constructed by engineering it with zinc doping used as a cathode material for eco‐friendly aqueous Zn ion battery is developed. A green and simple electrochemical deposition synthesis of Zn‐doped Mn3O4−MnO2 nanocomposite with vertically‐oriented 3D porous cereal‐like nanosheet framework (ZnMM‐NSs) is reproducibly performed directly onto the surface of AgCNT modified Ni foam in a mild aqueous ZnSO4+MnSO4 electrolyte. To the best of our knowledge, this is the first report on Zn doping in Mn3O4−MnO2 nanocomposite and the subsequent device assembly for aqueous zinc‐ion batteries. Zinc doping induced electrical/ionic conductivity enhancement, along with more active sites provided by 3D porous cereal‐like nanostructures and multiple Mn valences, this ZnMM‐NSs cell can deliver a high capacity, good rate performance, and satisfying cycling stability. Also, the Zn‐doped manganese oxides are obtained by a green method, which can reduce the entire cost, the usage of toxic solvents, the consumption of energy, and the disposable by‐product, paving the way for developing cost‐effective, easy‐to‐recycle, and environmentally friendly next‐generation energy storage systems. A self‐standing and binder‐free cathode: 3D vertically standing cereal‐like Zn‐doped MnOx nanosheets directly onto a silver nanoparticle‐carbon nanotube modified Ni foam were developed through a simple and green electrochemical deposition process for high‐performance aqueous zinc‐ion battery applications.
ISSN:2196-0216
2196-0216
DOI:10.1002/celc.202200750