摘要
Lithium-sulfur(Li-S)batteries with attractive capacity give remarkable potential for prospective high-capacity application scenarios but suffer a fatal flaw of short cyclability before large-scale commercialization especially owing to polysulfide(Li_(2)S_(n))transmembrane shuttling.To efficiently restrain chronic Li_(2)S_(n) shuttle and expedite Li^(+)transfer,herein,a novel electriferous charge-mosaic S(TMC@Lys-Li)separator preparation approach is recommended.Interfacial polymerizations of lithiated lysine and trimesoyl chloride establish an electriferous charge-mosaic polyamide functional layer.Substituted Li within the charge-mosaic layer offers transition or replacement sites for smoothing Li^(+)migrations,which constructs efficient Li^(+)fast-transfer private channels and accelerates the Li^(+)transfer rate to 9.4 times.Negatively charged polyamide skeleton synchronously heightens Li_(2)S_(n) rejections by combining Donnan and steric effects.S(TMC@Lys-Li)replenishes Li for homogenizing Li nucleation and growth,endowing stable plating/stripping behaviors over 250 cycles for Li-Cu batteries.Assembled Li-S cells thus exhibit excellent specific capacity and cyclability at multiple application scenarios such as long periods,high areal capacity,and fast charge,holding 78.1%retention after 500 cycles at 1 C.The superior thermal stability and self-discharge of S(TMC@Lys-Li)dramatically strengthen battery thermal runaway resistance even at155℃,which ensures security for Li-S battery high-power and high-temperature operations.Above alluring features enable charge-mosaic separators to be potentially adopted in practical Li-S batteries demanding strict security,high-capacity density,and fast charge technology.
基金
supported by the Natural Science Foundation of Shandong Province(ZR2022QB050)
the Liaocheng University Doctoral Initial Fund(318052137)。
