title: Hybrid Polymer/Garnet Electrolyte with a Small Interfacial Resistance for Lithium-Ion Batteries.
abstract: Li7La3Zr2O12-based Li-rich garnets react with water and carbon dioxide in air to form a Li-ion insulating Li2CO3layer on the surface of the garnet particles, which results in a large interfacial resistance for Li-ion transfer. Here, we introduce LiF to garnet Li6.5La3Zr1.5Ta0.5O12(LLZT) to increase the stability of the garnet electrolyte against moist air; the garnet LLZT-2 wt % LiF (LLZT-2LiF) has less Li2CO3on the surface and shows a small interfacial resistance with Li metal, a solid polymer electrolyte, and organic-liquid electrolytes. An all-solid-state Li/polymer/LLZT-2LiF/LiFePO4battery has a high Coulombic efficiency and long cycle life; a Li-S cell with the LLZT-2LiF electrolyte as a separator, which blocks the polysulfide transport towards the Li-metal, also has high Coulombic efficiency and kept 93 % of its capacity after 100 cycles.
authors.affiliation: Materials Science and Engineering Program and Texas Materials Institute, University of Texas at Austin, Austin, TX, 78712, USA.
authors.forename: Yutao
authors.initials: Y
authors.lastname: Li
authors.affiliation: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P.R. China.
authors.forename: Biyi
authors.initials: B
authors.lastname: Xu
authors.affiliation: Materials Science and Engineering Program and Texas Materials Institute, University of Texas at Austin, Austin, TX, 78712, USA.
authors.forename: Henghui
authors.initials: H
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P.R. China.
authors.forename: Huanan
authors.initials: H
authors.lastname: Duan
authors.affiliation: Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA.
authors.forename: Xujie
authors.initials: X
authors.lastname: Lü
authors.affiliation: Materials Science and Engineering Program and Texas Materials Institute, University of Texas at Austin, Austin, TX, 78712, USA.
authors.forename: Sen
authors.initials: S
authors.lastname: Xin
authors.affiliation: Materials Science and Engineering Program and Texas Materials Institute, University of Texas at Austin, Austin, TX, 78712, USA.
authors.forename: Weidong
authors.initials: W
authors.lastname: Zhou
authors.affiliation: Materials Science and Engineering Program and Texas Materials Institute, University of Texas at Austin, Austin, TX, 78712, USA.
authors.forename: Leigang
authors.initials: L
authors.lastname: Xue
authors.affiliation: Materials Science and Engineering Program and Texas Materials Institute, University of Texas at Austin, Austin, TX, 78712, USA.
authors.forename: Gengtao
authors.initials: G
authors.lastname: Fu
authors.affiliation: Materials Science and Engineering Program and Texas Materials Institute, University of Texas at Austin, Austin, TX, 78712, USA.
authors.forename: Arumugam
authors.initials: A
authors.lastname: Manthiram
authors.affiliation: Materials Science and Engineering Program and Texas Materials Institute, University of Texas at Austin, Austin, TX, 78712, USA.
authors.forename: John B
authors.initials: JB
authors.lastname: Goodenough
keywords: Li-S battery; Li-rich garnet; all-solid-state battery; interfacial resistance; lithium fluoride