The excellent electrochemical performances of ZnMn2O4/Mn2O3: The composite cathode material for potential aqueous zinc ion batteries

By Sinian Yang, Manshu Zhang, Xianwen Wu, Xiangsi Wu, Fanghong Zeng, Yuting Li, S. Duan, Dihua Fan, Yan Yang, Xianming Wu. Journal of Electroanalytical Chemistry, 2019

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Abstract A novel composite material of ZnMn2O4/Mn2O3 is fabricated via a facile surfactant-assisted solvothermal method, followed by an annealing process at 600 °C in air for 4 h. When further evaluated as a cathode for aqueous rechargeable zinc ion batteries (ARZIBs) for the first time, it delivers an initial discharge capacity of up to 82.6 mAh/g at 0.5 A/g just using 1 mol/L ZnSO4 as the electrolyte, and the amazing reversible capacity of 111.9 mAh/g can be achieved even after 300 cycles, much higher than the initial one. As the current density increases to 3.2 A/g, it also exhibits a high capacity as much as 42.1 mAh/g. The superior cycleability and remarkable rate performance are attributed to the synergistic effect, the ultrafast ion transportation characteristic and the smaller self-discharge phenomenon of ZnMn2O4 and Mn2O3. Thus, the work gives a new insight into developing new-type of cathode materials for large-scale application of ARZIBs with low cost, high safety and large power density.

Subfields: Automotive Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/d2361b54e06c9d09cb1533f546b16fc90bf786de