Versatile Asymmetric Separator with Dendrite-Free Alloy Anode Enables High-Performance Li-S Batteries.

ABSTRACT: Lithium-sulfur batteries (LSBs) with extremely-high theoretical energy density (2600 Wh kg^-1 ) are deemed to be the most likely energy storage system to be commercialized. However, the polysulfides shuttling and lithium (Li) metal anode failure in LSBs limit its further commercialization. Herein, a versatile asymmetric separator and a Li-rich lithium-magnesium (Li-Mg) alloy anode are applied in LSBs. The asymmetric separator is consisted of lithiated-sulfonated porous organic polymer (SPOP-Li) and Li_6.75 La₃ Zr_1.75 Nb_0.25 O₁₂ (LLZNO) layers toward the cathode and anode, respectively. SPOP-Li serves as a polysulfides barrier and Li-ion conductor, while the LLZNO functions as an "ion redistributor". Combining with a stable Li-

SUBMITTER: Yan W 

PROVIDER: S-EPMC9443453 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature