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Hausmannite Mn ~3~ O ~4~ as a positive active electrode material for rechargeable aqueous Mn‐oxide/Zn batteries by Ivan Stoševski; Arman Bonakdarpour; Baizeng Fang; Sharon Ting Voon; David P. Wilkinson is a Engineering article available to read on EtoBox.

What is Hausmannite Mn ~3~ O ~4~ as a positive active electrode material for rechargeable aqueous Mn‐oxide/Zn batteries about?

Batteries with manganese (di)oxide/zinc chemistry and aqueous-based electrolytes have the potential to address energy storage demands of stationary applications primarily because of the abundant availability of Zn and Mn-oxides, their intrinsic low cost, and the high specific/volumetric charge capacities. Herein, we report the use of Mn 3 O 4 (hausmannite phase of manganese oxide) as the positive electrode material in a rechargeable near-neutral Mn-oxide/Zn battery configuration. Electrochemical investigations reveal that the hausmannite phase can activate for charge/discharge processes during the first 40 to 50 cycles and then a maximum capacity is obtained. This material shows excellent reversibility (~800 cycles) in keeping more than 65% of its maximum capacity. For the first time, the hausmannite activation mechanism was better understood under near-neutral conditions. By using different characterization techniques (X-ray powder diffraction [XRD], inductively coupled plasmaoptical emission spectrometry [ICP-OES], X-ray photoelectron spectroscopy [XPS], and energy dispersive X-ray spectroscopy [EDS]) formation of Zn-based compounds at the electrode surface was confirmed. One of

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Author

Ivan Stoševski; Arman Bonakdarpour; Baizeng Fang; Sharon Ting Voon; David P. Wilkinson

Publisher

Hindawi Limited

Published

2020

Language

EN

Field

Engineering (Physical Sciences)