Co single-atom catalyst on ordered macro-microporous structure as separator for Li-S battery
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Updated: Jun 1, 2025
Protocol of Electrochemical Test and Characterization of Aprotic Li-O2 Battery
Published on: July 12, 2016
Wenhui Cao1, Mengyu Liu1, Kai Zhang1
1State Key Laboratory Base of Eco-Chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China.
Abstract:
Lithium-sulfur (Li-S) batteries have attracted significant attention due to their high theoretical energy density, low cost and environmental friendliness, which are considered one of the most promising candidates for next-generation energy storage devices. However, the sluggish kinetics associated with sulfur oxidation-reduction reactions and the detrimental shuttle effect caused by lithium polysulfides (LiPSs) significantly impacts the electrochemical performance of Li-S batteries. In this work, Co single-atom catalyst (CoSAC-NC) on an ordered macro-microporous structure are designed, and the catalyst are coated onto 2325 separator. The ordered micro-microporous structure of CoSAC-NC enhances the interaction with LiPSs and provide reservoir for LiPSs. Secondly, the highly exposed Co-Nx configuration active sites can effectively anchor LiPSs and promotes their rapid conversion. This work significantly improves the utilization efficiency of the cathode, resulting in an exceptionally low-capacity decay rate of just 0.043 % per cycle over 1000 cycles at 1 C.
