Ultrathin two-dimensional bimetal NiCo-based MOF nanosheets as ultralight interlayer in lithium-sulfur batteries

Single‐atom electrocatalysts for lithium–sulfur chemistry: Design principle, mechanism, and outlook

“…It can be concluded that SACs can effectively enable the comprehensive management of suppression of the LiPS shuttle effect, promotion of sulfur reactions, and lithium metal anode optimization toward long‐life LSBs. An LSB system involves complex phase conversion reactions that result in unclear correlations between sulfur conversion and lithium evolution 122–126 . Therefore, identification of the working mechanism of SACs in lithium dissolution, and transfer and deposition behaviors is still an intractable challenge.…”

“…Fe Fe-N Li foil [121] reactions that result in unclear correlations between sulfur conversion and lithium evolution. [122][123][124][125][126] Therefore, identification of the working mechanism of SACs in lithium dissolution, and transfer and deposition behaviors is still an intractable challenge.…”

CoFe2O4@rGO as a Separator Coating for Advanced Lithium–Sulfur Batteries

“…[16] Given this, the modification of the separator is an effective and simple method to intercept the diffusion of polysulfides, which is expected to bring new vitality to Li-S batteries. [17][18][19][20] In early studies, many carbon materials (e.g., reduced graphene oxide, acetylene black, and multiwalled carbon nanotubes) were widely used for separator Lithium-sulfur (Li-S) batteries are hindered by the undesired shuttle effect and sluggish electrochemical conversion kinetics. Herein, a well-designed CoFe 2 O 4 @reduced graphene oxide (CFO@rGO) composite is used to modify the separator to develop a multifunctional polysulfide barrier.…”

“…[ 16 ] Given this, the modification of the separator is an effective and simple method to intercept the diffusion of polysulfides, which is expected to bring new vitality to Li–S batteries. [ 17–20 ] In early studies, many carbon materials (e.g., reduced graphene oxide, acetylene black, and multiwalled carbon nanotubes) were widely used for separator modification because of their own advantages of light weight, high electrical conductivity, and ease of processing. [ 21 ] However, the interaction between nonpolar carbon and polar polysulfides is not sufficient to effectively immobilize polysulfides in the cathode side.…”

Engineering Triple-Phase Interfaces Enabled by Layered Double Perovskite Oxide for Boosting Polysulfide Redox Conversion

“…Subsequently, versatile carbonaceous materials were proposed to enhance the conductivity of cathodes and physically block LiPSs by the presence of micro- or mesoporous structures. − However, carbonaceous materials only exhibit weak adsorption of polar LiPSs because of the conjugated nonpolar carbon planes . Inorganic metal compounds were further proposed in order to chemically immobilize LiPSs by strong anchoring sites. − Furthermore, with the introduction of the concept of electrocatalysis in Li–S batteries, , more attention has been paid to limited adsorption sites and saturation of adsorption in the case of overwhelming LiPSs in electrolyte. − Since then, various electrocatalysts have been widely reported to catalyze the redox conversion of LiPSs. − …”