• 文献标题:   Ultrathin Al2O3-coated reduced graphene oxide membrane for stable lithium metal anode
  • 文献类型:   Article
  • 作  者:   ZHANG F, SHEN F, FAN ZY, JI X, ZHAO B, SUN ZT, XUAN YY, HAN XG
  • 作者关键词:   lithium metal anode, atomic layer deposition, rgo membrane, lifree anode, li protection
  • 出版物名称:   RARE METALS
  • ISSN:   1001-0521 EI 1867-7185
  • 通讯作者地址:   Xi An Jiao Tong Univ
  • 被引频次:   0
  • DOI:   10.1007/s12598-018-1054-6
  • 出版年:   2018

▎ 摘  要

Lithium (Li) metal has been considered as the most attractive anode materials for Li-ion batteries (LIBs) due to its high theoretic specific capacity. The formation of unstable solid electrolyte interphase (SEI) and dendritic Li on the metal anode, however, hindered its practical application. Herein, to address the issues, a Li-free electrode with ultrathin Al2O3 coated on reduced graphene oxide (rGO) membrane that covers a Cu foil current collector was developed. The composite electrode exhibits excellent interfacial protection of lithium metal deposited between Cu foil and rGO electrochemically. Firstly, it affords good Li+ permeability from the electrolyte. Secondly, the ultrathin Al2O3 has sufficient mechanical strength to inhibit the penetration of Li dendrite. Li metal was observed uniformly deposited between rGO membrane and Cu collector, and stable cycle performance of Li plating/stripping with Coulombic efficiency of similar to 91.75% at the 100th cycle is achieved in organic carbonate electrolyte without any additives.