Phase Separation–Controlled Assembly of Hierarchically Porous Aramid Nanofiber Films for High‐speed Lithium‐Metal Batteries (Small 52/2022)

Porous Aramid Nanofiber Films In article number 2205355, Jeong Gon Son, Bongjun Yeom, and co-workers report highly porous aramid nanofiber separators with dual porosity (>97%), prepared by a two-step solvent exchange process, for Lithium-metal batteries. The hierarchical porous structure with maximized porosity and selective affinity of the aramid nanofibers to anions shows effectively reduced Li dendrite formation and stable cycling performance under high-speed charge/discharge conditions.