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

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Abstract

Rechargeable aqueous zinc-ion batteries (ZIBs) are considered to be potential candidates for large-scale energy storage due to their high capacity, low cost, high safety and environmental friendliness. A key problem encountered in Mn-based cathodes is the dissolution of Mn2+ that causes significant capacity fading. Herein, a novel Mn2O3/Al2O3 composite material with a microbundle structure was synthesized using a strategy called ‘MOFs as precursors’. Uniform distribution of Mn2O3 and Al2O3 with a precise controlled Mn/Al molar ratio can be easily realized using this method. After compositing with Al2O3, the resulting material shows not only a higher capacity but also a better cycling stability (118.0 mA h g−1 after 1100 cycles 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 inspiration for the modification of Mn-based materials and other materials used in zinc ion batteries or other battery systems.

Graphical abstract: Mn2O3/Al2O3 cathode material derived from a metal–organic framework with enhanced cycling performance for aqueous zinc-ion batteries

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Article information


Submitted
11 Oct 2019
Accepted
27 Nov 2019
First published
28 Nov 2019

Dalton Trans., 2020, Advance Article
Article type
Paper

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

L. Gou, K. Mou, X. Fan, M. Zhao, Y. Wang, D. Xue and D. Li, Dalton Trans., 2020, Advance Article , DOI: 10.1039/C9DT03995C

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