The Si3N4/MoS2 hetero-structure as an effective polysulfide regulator for high-performance lithium-sulfur battery

Basal-Plane-Activated Molybdenum Sulfide Nanosheets with Suitable Orbital Orientation as Efficient Electrocatalysts for Lithium–Sulfur Batteries

“…A high reversible capacity of 537 mAh g –1 can be maintained even after 1300 cycles, corresponding to a decay rate of only 0.020% (Figure c). This performance is very competitive compared with other 2H-MoS 2 -based cathodes − (Figure d). Such excellent cycling stability demonstrates the superb capability of the CNT@MoS 2 -B host to confine polysulfides.…”

“…Recently, employing electrocatalysts has been recognized as an effective approach to accelerate sulfur redox reactions. − Among them, transition metal chalcogenides such as molybdenum disulfide (MoS 2 ) have attracted a lot of attention because of the large surface area and low cost. − Unfortunately, the active sites are limited to a small number of edge sites only, while the majority part (the basal plane) is catalytically inert. , It is highly desirable to provide deeper insights into this issue and improve the catalyst by activating the basal plane for exposing more active sites.…”

Nanoscale CuFe2O4 Uniformly Decorated on Nitrogen‐Doped Carbon Nanofibers as Highly Efficient Catalysts for Polysulfide Conversion in Lithium‐Sulfur Batteries

“…In response to the obstacles caused by the above‐stated issues, tremendous efforts have been invested in sulfur matrices, multifunctional binder, electrolytes additives, and new cell structures [8–10] Among them, the use of carbon matrix of excellent conductivity, tunable porous structure and high surface area such as carbon nanotubes, carbon nanofibers, graphene is foremost, which can not only inhibit the shuttle effect but also anchor polysulfides [11,12] . Nevertheless, just relying on the nonpolar weak physical adsorption of carbon materials is insufficient to inhibit the shuttling and promote redox kinetics.…”

Facile Microwave-Impulse Synthesis of Multifunctional rGO/MoS2/MoO2 Composites as a Permselective Separator-Coating Layer for Li–S Batteries

“…However, sparsely exposed active sites and low electronic conductivity limit the catalytic capacity of 2H-phase MoS 2 . Polar materials, such as MoN, MoO 2 , Si 3 N 4 , and CoSe 2 , have also been employed as functional materials to improve the capacity retention; they can construct heterojunctions with MoS 2 to promote electron transport and expose more active sites to facilitate the adsorption and conversion of LPSs. In recent years, the rGO/MoS 2 /MoO 2 heterostructure composed of reduced graphene oxide (rGO) sheets and MoS 2 /MoO 2 heterojunctions has been applied as an anode material of Li-ion batteries. − The conductive network offered by rGO can provide rapid electron transport channels for MoS 2 /MoO 2 heterojunctions.…”

“…The high conductivity of graphene and the good polar interaction between MoS 2 and LPSs have motivated several scholars to study graphene/MoS 2 composites as cathode substrates 26,27 or separator-coating layers 28,29 However, sparsely exposed active sites and low electronic conductivity limit the catalytic capacity of 2H-phase MoS 2 . 30 Polar materials, such as MoN, 31 MoO 2 , 32 Si 3 N 4 , 33 and CoSe 2 , 34 have also been employed as functional materials to improve the capacity retention; they can construct heterojunctions with MoS 2 to promote electron transport and expose more active sites to facilitate the adsorption and conversion of LPSs. In recent years, the rGO/MoS 2 /MoO 2 heterostructure composed of reduced graphene oxide (rGO) sheets and MoS 2 /MoO 2 heterojunctions has been applied as an anode material of Li-ion batteries.…”