Rechargeable aqueous zinc-manganese dioxide batteries with high energy and power densities

Ning Zhang, Fangyi Cheng (), Junxiang Liu, Liubin Wang, Xinghui Long, Xiaosong Liu, Fujun Li and Jun Chen ()
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Ning Zhang: Nankai University
Fangyi Cheng: Nankai University
Junxiang Liu: Nankai University
Liubin Wang: Nankai University
Xinghui Long: Chinese Academy of Sciences
Xiaosong Liu: Chinese Academy of Sciences
Fujun Li: Nankai University
Jun Chen: Nankai University

Nature Communications, 2017, vol. 8, issue 1, 1-9

Abstract: Abstract Although alkaline zinc-manganese dioxide batteries have dominated the primary battery applications, it is challenging to make them rechargeable. Here we report a high-performance rechargeable zinc-manganese dioxide system with an aqueous mild-acidic zinc triflate electrolyte. We demonstrate that the tunnel structured manganese dioxide polymorphs undergo a phase transition to layered zinc-buserite on first discharging, thus allowing subsequent intercalation of zinc cations in the latter structure. Based on this electrode mechanism, we formulate an aqueous zinc/manganese triflate electrolyte that enables the formation of a protective porous manganese oxide layer. The cathode exhibits a high reversible capacity of 225 mAh g−1 and long-term cyclability with 94% capacity retention over 2000 cycles. Remarkably, the pouch zinc-manganese dioxide battery delivers a total energy density of 75.2 Wh kg−1. As a result of the superior battery performance, the high safety of aqueous electrolyte, the facile cell assembly and the cost benefit of the source materials, this zinc-manganese dioxide system is believed to be promising for large-scale energy storage applications.

Date: 2017
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DOI: 10.1038/s41467-017-00467-x

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