Journal
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
Volume 104, Issue 3, Pages 635-646Publisher
SPRINGER
DOI: 10.1007/s10971-022-05891-0
Keywords
Metal negative electrode battery; Positive electrode material; Complex polymerization; Propylene oxide
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Funding
- JST ALCA-APRING [JPMJAL1301]
- Kato Foundation for promotion of Science [KS-3306]
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This study prepared conductive mixtures as positive electrode active materials in rechargeable Mg batteries. High specific surface area and high conductivity are key parameters for practical room-temperature operation.
We prepared conductive mixtures of Cu1.5Mn1.5O4 and Mn3O4 spinels (CMO-MOs) as positive electrode active materials in rechargeable Mg batteries (RMBs) using a sol-gel complex polymerization method. The CMO-MO spinel mixtures with high specific surface areas above 100 m(2) g(-1) were obtained with mild calcination in Ar at 300 degrees C. The conductivity of CMO-MOs was estimated to be approximately 1000 times higher than that of a conventional MgMn2O4 (MMO) spinel powder. The discharge capacities evaluated using 2032-type coin-cell battery with a Mg-alloy negative electrode at room temperature increase with an increase in the specific surface area of the spinel powders. The specific surface area for providing the theoretical capacity of the conductive CMO-MOs was about one-third that of the insulative MMO. High specific surface area and high conductivity are key parameters for the positive active material to realize practical room-temperature operation of RMBs. [GRAPHICS] .
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