Tailored ZnO-ZnS heterostructure enables a rational balancing of strong adsorption and high catalytic activity of polysulfides for Li-S batteries

Vacancy‐Defect Topological Insulators Bi2Te3−x Embedded in N and B Co‐Doped 1D Carbon Nanorods Using Ionic Liquid Dopants for Kinetics‐Enhanced Li–S Batteries

“…Lithium-sulfur (Li-S) batteries have been among the most promising candidates for next-generation energy-storage systems, owing to their high theoretical specific capacity (1675 mAh g −1 ), high energy density of 2567 Wh kg −1 , low cost, and abundance of sulfur. [1,2] Unfortunately, the practical Li 2 S 2 /Li 2 S to suppress the shuttle effect during the charge-discharge process and thus improve the practical energy density of Li-S batteries. [12] Furthermore, Yang et al have designed and prepared In-based catalysts to targetedly slow down the solidliquid conversion, dissolution of S 8 to polysulfides, while promoting the liquid-solid conversion, nucleation, and deposition of Li 2 S, which will effectively reduce the content of polysulfides in the electrolyte, finally suppressing the shuttle effect.…”

Defect-Rich W/Mo-Doped V2O5 Microspheres as a Catalytic Host To Boost Sulfur Redox Kinetics for Lithium–Sulfur Batteries

“…Lithium–sulfur (Li–S) batteries, with an S 8 molecule as the active cathode and metal Li as the anode, can deliver a high theoretical discharge capacity of 1675 mAh g –1 and an energy density of 2600 Wh g –1 after the complete reduction to insoluble Li 2 S 2 /Li 2 S. , Moreover, sulfur possesses other advantages including abundant reserves, inexpensive price, and environmental friendliness, which further make the Li–S battery a promising alternative for next-generation high-energy batteries. − Unfortunately, the notorious shuttle effect arising from the soluble lithium polysulfide (LiPSs) results in a rapid capacity loss of sulfur cathodes. − In addition, the insulating nature of sulfur and Li 2 S 2 /Li 2 S induces sluggish kinetics for the mutual conversion between different sulfur species, which severely impedes the achievement of high-capacity and stable sulfur cathodes. ,− …”

Hafnium Diboride Spherical Superstructure Born of 5d‐Metal Hf‐MOF‐Induced p Orbital Activity of B Atom and Enhanced Kinetics of Sulfur Cathode Reaction

“…In recent years, a series of polar materials have been qualified to anchor polysulfides through chemical bonds to sulfur or lithium, and obvious research progress has been achieved. [11][12][13] However, both physical adsorption and chemical anchoring of polysulfides appear to be "passive resolution" of the shuttle effect, and recent studies have also found that too strong chemisorption of polysulfides can lead to irreversible passivation of the surface of the host materials. [14] The high-efficiency catalysts that could accelerate the catalytic conversion of polysulfides are considered to be an "active way" to effectively accommodate the shuttle effect.…”