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Mn2O3/Al2O3 cathode material derived from bimetal-organic framework with enhanced cycling performance for aqueous zinc-ion batteries

Abstract

Rechargeable aqueous zinc-ion batteries (ZIBs) are considered to be a kind of potential candidate for large-scale energy storage due to their high capacity, low cost, high safety and environmental friendliness. A key problem that the Mn-based cathodes meet is the dissolution of Mn2+ that cause significant capacity fading. Herein, a novel Mn2O3/Al2O3 composite material with microbundles structure was synthesized using ‘MOFs as precursors’ strategy. The uniformly distributed Mn2O3 and Al2O3 with precise controlled Mn/Al molar ratio can be easily realized in this method. After compositing with Al2O3, the resulted material shows not only higher capacity but also better cycling stability (118.0 mAh g-1 after 1100 at 1500 mA g-1) than the pure Mn2O3. Combined with the ICP analysis, it can be deduced that Al2O3 can effectively inhibit the dissolution of Mn2+ from Mn3+ disproportionation. Our result can provide some inspirations for the modification of Mn-based materials and could also be extended to other materials in zinc ion battery or other battery systems.

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Supplementary files

Publication details

The article was received on 11 Oct 2019, accepted on 27 Nov 2019 and first published on 28 Nov 2019


Article type: Paper
DOI: 10.1039/C9DT03995C
Dalton Trans., 2019, Accepted Manuscript

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    Mn2O3/Al2O3 cathode material derived from bimetal-organic framework with enhanced cycling performance for aqueous zinc-ion batteries

    L. Gou, K. Mou, X. Fan, M. J. Zhao, Y. Wang, D. Xue and D. Li, Dalton Trans., 2019, Accepted Manuscript , DOI: 10.1039/C9DT03995C

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