Mastering Surface Sulfidation of MnP-MnO₂ Heterostructure to Facilitate Efficient Polysulfide Conversion in Li─S Batteries.

ABSTRACT: The development of lithium-sulfur (Li─S) batteries has been hampered by the shuttling effect of lithium polysulfides (LiPSs). An effective method to address this issue is to use an electrocatalyst to accelerate the catalytic conversion of LiPSs. In this study, heterogeneous MnP-MnO₂ nanoparticles are uniformly synthesized and embedded in porous carbon (MnP-MnO₂/C) as core catalysts to improve the reaction kinetics of LiPSs. In situ characterization and density functional theory (DFT) calculations confirm that the MnP-MnO₂ heterostructure undergo surface sulfidation during the charge/discharge process, forming the MnS₂ phase. Surface sulfidation of the MnP-MnO₂ heterostructure catalyst significantly accelerated the SRR and Li₂

SUBMITTER: Liang F 

PROVIDER: S-EPMC11348264 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature