A quasi-intercalation reaction for fast sulfur redox kinetics in solid-state lithium–sulfur batteries

Abstract

Solid-state lithium-sulfur (Li-S) batteries are recognized as a competitive candidate for next-generation energy storage systems due to their high energy density and safety. However, the slow redox kinetics between S...

Ordered Mesoporous Carbon Grafted MXene Catalytic Heterostructure as Li-Ion Kinetic Pump toward High-Efficient Sulfur/Sulfide Conversions for Li–S Battery

“…Meanwhile, the migration number of Li + with different separators was performed (Figure S8). Compared with the OMC and MXene-based separators, the OMC- g -MXene/PP possesses the highest one of 0.89, significantly higher than the two controlled ones, which is ascribed to the fast desolvation capability by the catalytic OMC- g -MXene, implying the positive effects of OMC- g -MXene for Li ion kinetic pump in Li–S batteries. , …”

“…Compared with the OMC and MXene-based separators, the OMC-g-MXene/PP possesses the highest one of 0.89, significantly higher than the two controlled ones, which is ascribed to the fast desolvation capability by the catalytic OMC-g-MXene, implying the positive effects of OMC-g-MXene for Li ion kinetic pump in Li−S batteries. 45,46 To further explore the catalytic effects in accelerating ion diffusion by OMC-g-MXene heterojunction for the kinetics of sulfur conversion, the full cells with OMC, MXene, and OMCg-MXene modified separators were assembled, respectively. Similar to the symmetric cell, the fresh full cell based on OMCg-MXene/PP has the smallest internal resistance and charge transfer resistance (Figure S9 and Table S2), suggesting the fast ion and electronic exchanges.…”

High Energy Density Lithium–Sulfur Batteries Based on Carbonaceous Two-Dimensional Additive Cathodes

“…With the aim of tackling these challenges, several strategies including innovative anode architectures and protection techniques, − functionalized separators, − liquid electrolyte design, − the use of all-solid-state polymer electrolytes, − or novel cathode materials − have been recently explored. Among them, the sulfur cathode design has been under high scrutiny as it could solve many of the above-mentioned issues.…”

Hollow Co3S4 Nanocubes Interconnected with Carbon Nanotubes as Nanoreactors to Accelerate Polysulfide Conversion for High-Performance Lithium–Sulfur Batteries

“…Lithium–sulfur batteries (LSBs) with a high energy density of 2600 Wh kg –1 have drawn intensive attention based on the double electron reaction of sulfur. − Additionally, the raw material sulfur is abundant in nature and available at low cost. − Unfortunately, there are some inherent defects, such as the insulation properties of reactant sulfur and product Li 2 S 1/2 (Li 2 S 1/2 : Li 2 S 2 and Li 2 S), the notorious “shuttle effect” originating from the dissolution and diffusion of lithium polysulfides (LiPSs, Li 2 S x , 3 ≤ x ≤ 8) in ether electrolyte, the sluggish sulfide chemistry conversion reaction kinetics, and volume change caused by the interconversion of S 8 and Li 2 S 1/2 , that cause slow sulfur utilization and poor cyclic stability, further restraining the large-scale promotion in the lithium–sulfur system. − To solve these problems, a lot of approaches have been applied to enhance the electrochemical properties of the Li–S system, such as adding functional interlayers or electrolyte additives, modifying lithium metal, and designing the sulfur host with a rational framework. − …”