Tuning lithium-peroxide formation and decomposition routes with single-atom catalysts for lithium–oxygen batteries

Li-Na Song, Wei Zhang, Ying Wang, Xin Ge, Lian-Chun Zou, Huan-Feng Wang, Xiao-Xue Wang, Qing-Chao Liu, Fei Li and Ji-Jing Xu ()
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Li-Na Song: Jilin University
Wei Zhang: Jilin University
Ying Wang: Changchun Institute of Applied Chemistry Chinese Academy of Sciences
Xin Ge: Jilin University
Lian-Chun Zou: Jilin University
Huan-Feng Wang: Jilin University
Xiao-Xue Wang: Jilin University
Qing-Chao Liu: Zhengzhou University
Fei Li: Jilin University
Ji-Jing Xu: Jilin University

Nature Communications, 2020, vol. 11, issue 1, 1-11

Abstract: Abstract Lithium-oxygen batteries with ultrahigh energy density have received considerable attention as of the future energy storage technologies. The development of effective electrocatalysts and a corresponding working mechanism during cycling are critically important for lithium-oxygen batteries. Here, a single cobalt atom electrocatalyst is synthesized for lithium-oxygen batteries by a polymer encapsulation strategy. The isolated moieties of single atom catalysts can effectively regulate the distribution of active sites to form micrometre-sized flower-like lithium peroxide and promote the decomposition of lithium peroxide by a one-electron pathway. The battery with single cobalt atoms can operate with high round-trip efficiency (86.2%) and long-term stability (218 days), which is superior to a commercial 5 wt% platinum/carbon catalyst. We reveal that the synergy between a single atom and the support endows the catalyst with excellent stability and durability. The promising results provide insights into the design of highly efficient catalysts for lithium-oxygen batteries and greatly expand the scope of future investigation.

Date: 2020
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DOI: 10.1038/s41467-020-15712-z

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