The Li-O 2 batteries have high theoretical energy densities. Commercialization of the technology was hampered by the poor performance of the air cathode.
A group of professors from the Chinese Academy of Sciences and the Dalian Institute of Chemical Physics have collaborated on a project.
The study was published in a peer reviewed journal.
It is still challenging to design oxygen catalysts that can regulate the ORR and OER at the three-phase interface.
According to the researchers, the lower charge overpotential of 0.86 V was offered by the Mn 3 O 4 NS/G with the enriched oxygen vacancies.
Long-term stability over 1,300 hours and high specific capacity up to 35,583 mAh/g were among the highlights of the report.
The lower adsorption energy ofMn 3 O 4 (101) for the discharge product Li 2 O 2 was proved by both the experimental and theoretical results.
The work may give clues for engineering materials with defined crystal facet for Li-O 2 batteries.
More information: Yuejiao Li et al, Two-Dimensional Mn3O4 Nanosheets with Dominant (101) Crystal Planes on Graphene as Efficient Oxygen Catalysts for Ultrahigh Capacity and Long-Life Li–O2 Batteries, ACS Catalysis (2022). DOI: 10.1021/acscatal.2c02544 Journal information: ACS Catalysis Citation: Researchers develop efficient oxygen catalysts for lithium-oxygen batteries (2022, October 17) retrieved 17 October 2022 from https://phys.org/news/2022-10-efficient-oxygen-catalysts-lithium-oxygen-batteries.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
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