Journal
IONICS
Volume 29, Issue 5, Pages 1913-1921Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-023-04955-7
Keywords
Zinc-ion battery; Nanocomposite cathode; beta-MnO2 nanorods; Heterostructure; High performance
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In this study, a MnO2@Co3O4 composite electrode material was prepared by PVP-assisted hydrothermal method and calcination method. The MnO2@Co3O4 composite showed excellent electrochemical performance, including high specific capacity and good cycle stability, offering fresh perspectives on how to build cathode materials with good cycle stability.
In aqueous zinc ion battery, manganese dioxide (MnO2) has received extensive study as a high-performance cathode material. But the low ionic conductivity and weak diffusion ability prevent its widespread use. In this study, MnO2@Co3O4 composite electrode material is prepared by PVP-assisted hydrothermal method and calcination method. Co3O4 nanocrystals (about 5 nm) are fixed on MnO2 nanorods to form a unique heterostructure, showing an excellent electrochemical performance. The MnO2@Co3O4 composite has a high specific capacity of 350.3 mAh g(-1) at 100 mA g(-1) and retains 86.2% of its initial capacity after 1200 charge/discharge cycles at 2000 mA g(-1). This study offers fresh perspectives on how to build cathode materials with good cycle stability.
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