Suppressing Lithium Dendrite Growth by Metallic Coating on a Separator

• DOI: 10.1002/adfm.201704391
• Publication Date: 2017-10-10T12:28:36Z
• Authors: Hongkyung Lee; Xiaodi Ren; Chaojiang Niu; Lu Yu; Mark H. Engelhard; Inseong Cho; Myung‐Hyun Ryou; Hyun Soo Jin; Hee‐Tak Kim; Jun Liu; Wu Xu; Ji‐Guang Zhang
• Keywords: Separator (oil production); Dendrite (mathematics); Plating (geology); Stripping (fiber); Lithium metal; Current collector

Abstract Lithium (Li) metal is one of the most promising candidates for anode in high‐energy‐density batteries. However, Li dendrite growth induces a significant safety concerns these Here, multifunctional separator through coating thin electronic conductive film on side conventional polymer facing proposed purpose suppression and cycling stability improvement. The ultrathin Cu polyethylene support serves as an additional conducting agent to facilitate electrochemical stripping/deposition with less accumulation electrically isolated or “dead” Li. Furthermore, its nature guides backside plating modulates deposition morphology via merging. In addition, metallic can also improve thermal enhance Due unique beneficial features, this enables stable enhanced Coulombic efficiency during extended cycles batteries increases lifetime by preventing short‐circuit failures even under extensive deposition.