Effect of Multiple Cation Electrolyte Mixtures on Rechargeable Zn-MnO2 Alkaline Battery

Benjamin J. Hertzberg, An Huang, Andrew Hsieh, Mylad Chamoun, Greg Davies, Joon Kyo Seo, Zhong Zhong, Mark Croft, Can Erdonmez, Ying Shirley Meng, Dan Steingart

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Abstract

A Bi2O3 in β-MnO2 composite cathode material has been synthesized using a simple hydrothermal method and cycled in a mixed KOH-LiOH electrolyte with a range of concentrations. We show that, at a KOH:LiOH molar ratio of 1:3, both proton insertion and lithium insertion occur, allowing access to a higher fraction of the theoretical capacity of the MnO2 while preventing the formation of ZnMn2O4. This enables a capacity of 360 mAh/g for over 60 cycles, with cycling limited more by anode properties than traditional cathodic failure mechanisms. The structural changes occurring during cycling are characterized using electron microscopy and in situ synchrotron energy-dispersive X-ray diffraction (EDXRD) techniques. This mixed electrolyte shows exceptional cyclability and capacity and can be used as a drop-in replacement for current alkaline batteries, potentially drastically improving their cycle life and creating a wide range of new applications for this energy storage technology.

Original languageEnglish (US)
Pages (from-to)4536-4545
Number of pages10
JournalChemistry of Materials
Volume28
Issue number13
DOIs
StatePublished - Jul 12 2016

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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    Hertzberg, B. J., Huang, A., Hsieh, A., Chamoun, M., Davies, G., Seo, J. K., Zhong, Z., Croft, M., Erdonmez, C., Meng, Y. S., & Steingart, D. (2016). Effect of Multiple Cation Electrolyte Mixtures on Rechargeable Zn-MnO2 Alkaline Battery. Chemistry of Materials, 28(13), 4536-4545. https://doi.org/10.1021/acs.chemmater.6b00232