We summarize the latest strategies for single atoms (SAs) supported on carbons for the application of Li-S batteries, including cathode, modified separator, and Li metal anode. The future directions of SAs in Li-S batteries are proposed.
Significance and Impact
This review provides a systematic understanding of how the SAs as catalysis, adsorption, and nucleation centers can help build better Li-S batteries.
- SAs with high catalytic ability can solve the issue of sluggish solid (S8)-liquid (Li2Sx, 4 ≤ x ≤ 8)-solid (Li2S2 and Li2S) transition kinetics by reducing the energy barriers.
- The high adsorption capacity of soluble lithium polysulfides of SAs is essential for inhibition of the shuttle effect.
- SAs as homogeneous nucleation seeds can induce Li uniform deposition under low overpotential without Li dendrites formation.