An Ion‐Sieving Janus Separator toward Planar Electrodeposition for Deeply Rechargeable Zn‐Metal Anodes

Abstract The irregular and random electrodeposition of zinc has emerged as a non‐negligible barrier for deeply rechargeable aqueous zinc (Zn)‐ion batteries (AZIBs), yet traditional texture regulation of the Zn substrate cannot continuously induce uniform Zn deposition. Here, a Janus separator is constructed via parallelly grown graphene sheets modified with sulfonic cellulose on one side of the commercial glass fiber separator through the spin‐coating technique. The Janus separator can consistently regulate Zn growth toward a locked crystallographic orientation of Zn(002) texture to intercept dendrites. Furthermore, the separator can spontaneously repel SO 4 2− and anchor H + while allowing effective transport…

• NN
  National Natural Science Foundation of China

  Awards: 51972346, 21875238, 51932011