期刊
MOLECULES
卷 25, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/molecules25040924
关键词
sodium and potassium birnessite; hybrid magnesium batteries; aqueous electrolyte
资金
- Ministerio de Ciencia, Innovacion y Universidades (MCIU) [MAT2017-84002-C2-1-R]
- ERDF funds
- Junta de Andalucia
Sodium and magnesium batteries with intercalation electrodes are currently alternatives of great interest to lithium in stationary applications, such as distribution networks or renewable energies. Hydrated laminar oxides such as birnessites are an attractive cathode material for these batteries. Sodium and potassium birnessite samples have been synthesized by thermal and hydrothermal oxidation methods. Hybrid electrochemical cells have been built using potassium birnessite in aqueous sodium electrolyte, when starting in discharge and with a capacity slightly higher than 70 mA h g(-1). Hydrothermal synthesis generally shows slightly poorer electrochemical behavior than their thermal counterparts in both sodium and potassium batteries. The study on hybrid electrolytes has resulted in the successful galvanostatic cycling of both sodium birnessite and potassium birnessite in aqueous magnesium electrolyte, with maximum capacities of 85 and 50 mA h g(-1), respectively.
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