Dendrites‐Free Lithium Metal Anode Enabled by Synergistic Surface Structural Engineering
Jie Di, Jin‐Lin Yang, Han Tian, Pengfei Ren, Yirui Deng, Wenhao Tang, Wenqi Yan, Ruiping Liu, Jianmin Ma
Abstract
Abstract Lithium (Li) metal with high specific capacity and low redox potential is widely considered as a potential anode for lithium‐ion batteries (LIBs) with high energy density. However, the catastrophic dendrites growth, “dead Li” formation, and surface passivation hinder its practical application. Herein, a selective artificial solid electrolyte interphase (SEI) layer (Li 2 S x , x = 1, 2) protection strategy is adopted, where the tip sites passivation and the uniform Li nucleation in grooves are well combined, which enables reversible Li stripping/plating with high storage capacity and robust electrode framework. The grooves derived patterned array Li with selective Li 2 S x artificial SEI (LS@A‐Li) exhibit over 1800 h cycling life at 1.0 mA cm –2 /1.0 mAh cm –2 and over 600 h even under 5.0 mA cm –2 /10.0 mAh cm –2 . The application feasibility of such LS@A‐Li is also confirmed by coupling with commercial LiFePO 4 and LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NCM523) in the full batteries. This work paves way for the large‐scale application of Li metal anode in lithium‐metal batteries with a facile and efficient fabrication process.