A 3D Graphene/WO3 nanowire composite with enhanced capture and polysulfides conversion catalysis for high-performance Li–S batteries

Wide-Temperature-Range Li–S Batteries Enabled by Thiodimolybdate [Mo2S12]2– as a Dual-Function Molecular Catalyst for Polysulfide Redox and Lithium Intercalation

“…The insulating nature of sulfur itself makes elemental sulfur unsuitable for direct use as a cathode; therefore, finding suitable cathode materials is a crucial step in the development of high-performance Li–S batteries. − Initially, much effort was devoted to the design of carbon hosts to improve the electrical/ionic conductivities of sulfur and block the shuttling of LiPSs. However, these carbon-based nonpolar materials have only weak physical confinement with LiPSs and cannot effectively prevent LiPSs from dissolving into the electrolyte. − The polar compounds can provide “sulfiphilic” surface sites by forming chemical bonds with LiPSs to adsorb LiPSs, but the low conversion reaction and conductivity restrict their further application. − Recent studies imply that catalytic materials can promote LiPS–Li 2 S interconversion for overcoming the shuttling effect. − Yang and co-workers reported MoS 2 was an excellent catalytic material, but only the edges of MoS 2 nanoparticles are active, with the (001) basal planes of MoS 2 catalytically inert; thus, a high catalytic activity material requires MoS 2 nanocatalysts with a high number of exposed edge sites . Afterward, we designed the Co atomic clusters embedded in defect-rich hierarchical MoS 2 CNT-in-tube nanostructure to get more active sites that can enhance catalytic conversions between LiPSs and Li 2 S .…”

Core–shell polyoxometalate-based zeolite imidazole framework-derived multi-interfacial MoSe2/CoSe2@NC enabling multi-functional polysulfide anchoring and conversion in lithium–sulfur batteries

“…To inhibit the shuttling effect, a variety of nonpolar carbon materials, polar metal-based compounds and the hybrids of these two have been developed as typical host materials for S to immobilize LiPSs through physical and/or chemical interactions. 10,11 As for the sluggish sulfur conversion kinetics, on the one hand, the electron transfer could be accelerated by introducing materials with strong electrical conductivity. On the other hand, the conversion rate between S 8 and Li 2 S could be bidirectionally boosted by using suitable electrocatalysts.…”

Rational Design Hierarchical SnS2 Uniformly Adhered to Three-Sided Carbon Active Sites to Enhance Sodium Storage

“…Currently, a sequence of anode materials are being exploited, such as traditional graphite materials, , transition metal oxides, , alloy-based materials, , and metal sulfides. − Tin sulfide (SnS 2 ) is considered to be an ideal anode material for SIBs due to its large interlayer distance, low cost, and considerable theoretical specific capacity. − Nevertheless, in addition to the inherent advantages mentioned above, SnS 2 anodes generally suffer from some drawbacks, such as insufficient electronic conductivity, and the large volume change caused by the large Na + during insertion/extraction. , This invariably results in poor rate performance and electrode material cycle stability. , …”

“…Therefore, it is urgent to produce an anode material with a large interlayer distance and a large capacity. 9−11 Currently, a sequence of anode materials are being exploited, such as traditional graphite materials, 12,13 transition metal oxides, 14,15 alloy-based materials, 16,17 and metal sulfides. 18−21 Tin sulfide (SnS 2 ) is considered to be an ideal anode material for SIBs due to its large interlayer distance, low cost, and considerable theoretical specific capacity.…”