Single-atom tailoring of Li2S to Form Li2S2 for building better lithium-sulfur batteries

Deciphering Enhanced Solid-State Kinetics of Li–S Batteries via Te Doping

“…Additionally, when the DOD approached 100%, the reaction resistance gradually increased for both cells. This can be explained by the fact that Li 2 S has sluggish redox kinetics compared with Li 2 S 2 . To further investigate the reaction kinetics, CV was conducted at different scan rates, as shown in Figure c,d.…”

“…This can be explained by the fact that Li 2 S has sluggish redox kinetics compared with Li 2 S 2 . 42 To further investigate the reaction kinetics, CV was conducted at different scan rates, as shown in Figure 3c,d. Four peaks can be observed in the CV results, and the peaks are denoted by C1, C2, A1, and A2 in Figure 3c, where C1 and C2 are the first cathodic peak (at higher voltage) and second cathodic peak (at lower voltage), respectively, and A1 and A2 are the first anodic peak (at lower voltage) and second anodic peak (at higher voltage), respectively.…”

In Situ Transformation of LDH into NiCo2S4-NiS2 Nano-heterostructures on Hollow Carbon Boxes to Promote Sulfur Electrochemistry for High-Performance Lithium–Sulfur Batteries

“…The volume expansion during the cycle can be avoided using lithium sulfide as the positive electrode through the presolvation strategy, but the inactive lithium sulfide requires a high charging overvoltage, which will lead to electrolyte decomposition, low coulomb efficiency, and fast capacity decay. 6,7,17 Previous studies have shown that physically confining the sulfur within the pores of porous carbon materials can alleviate volume expansion and enhance the conductivity. 18−20 However, the weak interaction between nonpolar carbon materials and polar lithium polysulfides may eventually lead to the diffusion of polysulfides from the surface of carbon materials to the electrolyte due to the concentration gradient.…”

Metallic FeCo clusters propelling the stepwise polysulfide conversion in lithium–sulfur batteries

“…As a general strategy, the physical immobilization of elemental sulfur has been demonstrated on porous structures [7][8][9][10][11] such as carbon, 12,13 graphene [14][15][16] and carbon nanotubes. 17 Additionally, the chemical anchoring of sulfur [18][19][20][21] onto foreign-atomdoped materials 22,23 such as transition metal compounds, [24][25][26] metal-organic frameworks (MOFs) 27 and hydroxides 28 has also been explored. In this regard, some work focused on creating metallic compound/carbon substrate materials has been done using these principles.…”