Encapsulating-polysulfide electrolyte:An answer to practical lithium-sulfur batteries
Endowed with high theoretical specific energy(2600 Wh/kg)and low material cost,lithium-sulfur(Li-S)battery emerges as a promising candidate for the next-generation energy storage sys-tem.A working Li-S battery is in fact a liquid electrochemical system where the reaction of solid S/lithium sulfide(Li2S)pro-ceeds via dissolved lithium polysulfides(LiPSs)intermediates[1].The effective solvation of LiPSs is essential for S utilization and reaction kinetics but also induces severe challenges for stable Li metal anodes.The parasitic reactions between active Li and high-concentration LiPSs become rather detrimental under practi-cal conditions with high S loading(>4 mgs/cm2),low electrolyte/S(E/S)ratio(<3 pL/mgs),and limited Li anode(<50 pm),further hindering the cell lifespans.It is therefore imperative to protect the Li metal anode from its parasitic reactions with LiPSs for practical Li-S batteries[2,3].
answer、batteries、electrolyte、encapsulating、lithium-sulfur、polysulfide、practical
34
TP181;O646;O646.21
2023-05-09(万方平台首次上网日期,不代表论文的发表时间)
共2页
3-4