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

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ID: 106562
2020
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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.
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song2020tuningnature Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Song, Li-Na;Zhang, Wei;Wang, Ying;Ge, Xin;Zou, Lian-Chun;Wang, Huan-Feng;Wang, Xiao-Xue;Liu, Qing-Chao;Li, Fei;Xu, Ji-Jing;
Journal Nature communications
Year 2020
DOI
10.1038/s41467-020-15712-z
URL
Keywords
Escherichia coli carbon distribution dynamic regulation l-threonine maximization thermal switch system

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