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Angew Chem Int Ed Engl. 2016 Aug 16;55(34):9965-8. doi: 10.1002/anie.201604554. Epub 2016 Jun 30.

Fluorine-Doped Antiperovskite Electrolyte for All-Solid-State Lithium-Ion Batteries.

Author information

1
Materials research program and the Texas Materials Institute, University of Texas at Austin, Austin, TX, 78712, USA.
2
School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, P.R. China.
3
High Pressure Science and Engineering Center, University of Nevada, Las Vegas, NV, 89154, USA.
4
Center for Integrated Nanotechnologies, Las Los Alamos National Laboratory, Los Alamos, NM, 87545, USA.
5
Materials research program and the Texas Materials Institute, University of Texas at Austin, Austin, TX, 78712, USA. jgoodenough@mail.utexas.edu.

Abstract

A fluorine-doped antiperovskite Li-ion conductor Li2 (OH)X (X=Cl, Br) is shown to be a promising candidate for a solid electrolyte in an all-solid-state Li-ion rechargeable battery. Substitution of F(-) for OH(-) transforms orthorhombic Li2 OHCl to a room-temperature cubic phase, which shows electrochemical stability to 9 V versus Li(+) /Li and two orders of magnitude higher Li-ion conductivity than that of orthorhombic Li2 OHCl. An all-solid-state Li/LiFePO4 with F-doped Li2 OHCl as the solid electrolyte showed good cyclability and a high coulombic efficiency over 40 charge/discharge cycles.

KEYWORDS:

all-solid-state battery; antiperovskite; lithium-ion battery; solid electrolyte

PMID:
27356953
DOI:
10.1002/anie.201604554

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