Synergistic engineering of cobalt selenide and biomass-derived S, N, P co-doped hierarchical porous carbon for modulation of stable Li-S batteries

Construction of Co@N-CNTs grown on N-MoxC nanosheets for separator modification to enhance adsorption and catalytic conversion of polysulfides in Li–S batteries

“…[20][21][22][23][24] Among them, CNTs exhibit unique advantages in the transfer of electrons and ions due to their 1D nanostructure with a high lengthdiameter ratio. 25,26 Subsequently, polar materials including metal oxides, metal suldes, and metal carbides are also introduced, [27][28][29][30][31][32] which show superior capability in adsorbing and accelerating the reaction kinetics of LiPSs. However, their inherent poor conductivity or agglomeration limits their use in modifying separators, especially in LSBs with high sulfur loading.…”

Understanding the Catalytic Kinetics of Polysulfide Redox Reactions on Transition Metal Compounds in Li–S Batteries

“…Copyright 2022 American Chemical Society. (e) Part of the initial charge–discharge curves of the batteries with SNP-PC@MPC@CoSe//PP, SNP-PC@MPC//PP, and PP separator at 0.1 C. Reprinted with permission from ref . Copyright 2022 Elsevier.…”

“…can be introduced into the carbon material to increase polarity, thereby enhancing conductivity and the ability to capture polysulfides. Cheng et al 119 obtained a polar composite material (SNP-PC@MPC@CoSe) by growing CoSe nanoparticles on biomass-derived S, N, and P codoped hierarchical porous carbon. Its high-density microporous structure could physically confine the polysulfides.…”

Nickel vacancy tuning to tame polysulfide for Li–S batteries

“…To suppress the shuttle effect and enhance the electrochemical properties of Li–S batteries, researchers have focused on chemisorption and catalytic conversion of the LiPSs in recent years. 11 Carbon materials, 12 for example, with the introduction of polar hosts (heteroatoms, 13–17 polar functional groups, 18,19 metal–organic frameworks, 20,21 and covalent organic frameworks), 22–24 combine the advantages of high conductivity and surface polarity, thus enhancing the chemical absorption of polar LiPSs and confining the shuttle effect. Compared with modified carbon materials, transition metal alloys, 25,26 oxides, 27 hydroxides, 28 sulfides, 29,30 nitrides, 31–33 borides, 34 and carbides 35 demonstrate better catalytic ability to accelerate the kinetic conversion of LiPSs.…”