Ag2S-modified 3D Carbon Cloth as a Dendrite Suppressing Framework for High Energy Lithium-Sulfur Batteries

A 3D metallic Li anode (Li/Ag@CC) is obtained by injecting molten Li into Ag2S-modified carbon cloth (Ag2S@CC). The experimental observations reveal that the lithiothermic reaction of loaded Ag2S with molten Li and the capillary effect of carbon cloth matrix improve the Li wettability of Ag2S@CC. Benefiting from the miscibility of nano-Ag and Li on the carbon fibers, the Li/Ag@CC can effectively induce the uniform stripping/plating behavior of Li to inhibit dendrite growth, resulting in a long lifetime over 2000 h with low voltage hysteresis and fluctuation. Furthermore, the S||Li/Ag@CC full battery exhibits a high reversible capacity of 5.4 mAh cm−2 and stable cycling performance for 200 cycles.