Figure 12.

Synthesis Strategies, First-Principle Calculations, Discharge Process, and Electrochemical Performance Investigations

(A) One-step method to prepare sulfur-infused TiS₂ foam. Yellow: sulfur; dark gray: TiS₂; gray: Ti.

(B) Top and side views of Li₂S adsorption on TiS₂. Reprinted with permission from (Ma et al., 2015a). Copyright 2015, The Royal Society of Chemistry.

(C) CoS₂-incorporated carbon/sulfur cathode where polysulfide reduction is accelerated and polysulfide diffusion is weakened.

(D) Binding geometries and energies of a Li₂S₄ molecule on graphene (left, modeled as coronene) and (111) plane of CoS₂ with cobalt-terminated surface (right), which is derived from theoretical calculation based on DFT.

(E) Cycling performance of CoS₂ (15%) + G-based sulfur cathode at a current density of 2.0 C for 2,000 cycles, followed by 10 cycles at 0.2 C. Reprinted with permission from (Yuan et al., 2016). Copyright 2016, American Chemical Society.