451. Boosted Charge Transfer in Twinborn α-(Mn 2 O 3 -MnO 2 ) Heterostructures: Toward High-Rate and Ultralong-Life Zinc-Ion Batteries.
- Author
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Long J, Yang F, Cuan J, Wu J, Yang Z, Jiang H, Song R, Song W, Mao J, and Guo Z
- Abstract
Aqueous ZIBs are one of the most promising next-generation rechargeable batteries because of the high capacity, high hydrogen evolution overpotential, and chemically stable reversible plating/stripping of the zinc electrode in the mild aqueous electrolyte. However, there are limited cathode materials that can store Zn
2+ reversibly with superior cycling and rate capability. Herein, hierarchically porous nanorods composed of twinborn α-(Mn2 O3 -MnO2 ) heterostructures are proposed as a robust cathode for Zn storage. Thanks to the hierarchically porous nanorod morphology and the abundant interface of the heterostructures involving a built-in electric field, the as-obtained twinborn α-(Mn2 O3 -MnO2 ) electrode delivers a high capacity of 170 mA h g-1 for 2000 cycles at 500 mA g-1 and shows an excellent rate capability of up to 1.5 A g-1 with a capacity of 124 mA h g-1 . The inspiring results achieved exhibit the enormous potential of the high-performance heterostructure cathode for fast and stable ZIBs.- Published
- 2020
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