Ion-selective aramid nanofiber-based Janus separators fabricated by a dry-wet phase inversion approach for lithium–sulfur batteries

A large-area p -aramid nanofiber-based Janus separator containing an ion-selective nanoporous layer and a microporous layer fabricated by a facile dry-wet phase inversion method exhibits high porosity, an optimal pore size, exceptional electrolyte wettability, and thermal stability.