Zipper-Inspired SEI Film for Remarkably Enhancing the Stability of Li Metal Anode via Nucleation Barriers Controlled Weaving of Lithium Pits

摘要

The lithium dendrite, inducing short circuit and breaking solid electrolyte interphase (SEI) films, is deleterious to the stability of Li metal batteries due to the uncontrollable occurrence of miscellaneous stresses. In contrast to conventional suppression routes, herein a strategy is proposed via controlling SEI film broken regions to minimize releasing stress in terms of weaving lithium pits. Inspired by the principle of zippers, zipper-like SEI films enable offering ordered pattern on the surface of Li anode via mechanical rolling. For the available cells, net-like sewing/breaking patterns alternatively occur in Li plating/stripping. In the same electrolyte, a stable and dendrite-free Li homogeneous growth is achieved.