title: Synergetic Effects of Inorganic Components in Solid Electrolyte Interphase on High Cycle Efficiency of Lithium Ion Batteries.
abstract: The solid electrolyte interphase (SEI), a passivation layer formed on electrodes, is critical to battery performance and durability. The inorganic components in SEI, including lithium carbonate (Li2CO3) and lithium fluoride (LiF), provide both mechanical and chemical protection, meanwhile control lithium ion transport. Although both Li2CO3 and LiF have relatively low ionic conductivity, we found, surprisingly, that the contact between Li2CO3 and LiF can promote space charge accumulation along their interfaces, which generates a higher ionic carrier concentration and significantly improves lithium ion transport and reduces electron leakage. The synergetic effect of the two inorganic components leads to high current efficiency and long cycle stability.
authors.affiliation: Chemical and Materials Systems Laboratory, General Motors Research and Development Center , Warren, Michigan 48090, United States.|Department of Chemical and Materials Engineering, University of Kentucky , Lexington, Kentucky 40506, United States.
authors.forename: Qinglin
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: Department of Chemical and Materials Engineering, University of Kentucky , Lexington, Kentucky 40506, United States.
authors.forename: Jie
authors.initials: J
authors.lastname: Pan
authors.affiliation: Chemical and Materials Systems Laboratory, General Motors Research and Development Center , Warren, Michigan 48090, United States.
authors.forename: Peng
authors.initials: P
authors.lastname: Lu
authors.affiliation: Chemical and Materials Systems Laboratory, General Motors Research and Development Center , Warren, Michigan 48090, United States.
authors.forename: Zhongyi
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Chemical and Materials Systems Laboratory, General Motors Research and Development Center , Warren, Michigan 48090, United States.
authors.forename: Mark W
authors.initials: MW
authors.lastname: Verbrugge
authors.affiliation: School of Engineering, Brown University , Providence, Rhode Island 02019, United States.
authors.forename: Brian W
authors.initials: BW
authors.lastname: Sheldon
authors.affiliation: Department of Chemical and Materials Engineering, University of Kentucky , Lexington, Kentucky 40506, United States.
authors.forename: Yang-Tse
authors.initials: YT
authors.lastname: Cheng
authors.affiliation: Department of Chemical Engineering and Materials Science, Michigan State University , East Lansing, Michigan 48824, United States.
authors.forename: Yue
authors.initials: Y
authors.lastname: Qi
authors.affiliation: Chemical and Materials Systems Laboratory, General Motors Research and Development Center , Warren, Michigan 48090, United States.
authors.forename: Xingcheng
authors.initials: X
authors.lastname: Xiao
keywords: LiF/Li2CO3 interface; Lithium ion batteries; electron leakage; ionic conduction; solid electrolyte interphase; space charge