A recent development may provide clues for engineering Mn-based materials with a defined crystal facet for high-performance Li-O2 batteries.
Researchers at the Chinese Academy of Sciences have fabricated two-dimensional Mn3O4 nanosheets with dominant crystal planes on graphene as efficient oxygen catalysts for lithium-oxygen batteries, achieving ultrahigh capacity and long-term stability., the scientists explain that Li-O2 batteries are among the most promising devices for the green energy transition due to their high theoretical energy density.
Through their testing, the researchers noticed that the Mn3O4 NS/G with the facets and enriched oxygen vacancies offered a lower charge overpotential of 0.86 V than that of Mn3O4 nanoparticles on graphene . Moreover, the Mn3O4 NS/G cathode exhibited long-term stability over 1,300 hours and ultrahigh specific capacity up to 35,583 mAh/g at 200 mA/g, outperforming most Mn-based oxides for Li-O2 batteries previously studied.
“This work may provide clues for engineering Mn-based materials with a defined crystal facet for high-performance Li-O2 batteries,” Wu Zhongshuai, co-lead author of the research, said in a media statement.
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