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Title: NASICON Li 1.2 Mg 0.1 Zr 1.9 (PO 4 ) 3 Solid Electrolyte for an All‐Solid‐State Li‐Metal Battery

Journal Article · · Small Methods
 [1];  [2];  [3];  [2];  [4];  [2];  [2];  [2];  [5]; ORCiD logo [2]
  1. School of Materials Science and Energy Engineering Foshan University Foshan 528000 P. R. China, Materials Science and Engineering Program and Texas Materials Institute The University of Texas at Austin Austin TX 78712 USA
  2. Materials Science and Engineering Program and Texas Materials Institute The University of Texas at Austin Austin TX 78712 USA
  3. Department of Chemistry and Biochemistry Florida State University Tallahassee FL 32306 USA, National High Magnetic Field Laboratory Tallahassee FL 32310 USA, Neutron Scattering Division Oak Ridge National Laboratory Tallahassee FL 37830 USA
  4. State Key Lab of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 P. R. China
  5. Department of Chemistry and Biochemistry Florida State University Tallahassee FL 32306 USA, National High Magnetic Field Laboratory Tallahassee FL 32310 USA
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Abstract A thin solid electrolyte with a high Li + conductivity is used to separate the metallic lithium anode and the cathode in an all‐solid‐state Li‐metal battery. However, most solid Li‐ion electrolytes have a small electrochemical stability window, large interfacial resistance, and cannot block lithium‐dendrite growth when lithium is plated on charging of the cell. Mg 2+ stabilizes a rhombohedral NASICON‐structured solid electrolyte of the formula Li 1.2 Mg 0.1 Zr 1.9 (PO 4 ) 3 (LMZP). This solid electrolyte has Li‐ion conductivity two orders of magnitude higher at 25 °C than that of the triclinic LiZr 2 (PO 4 ) 3 . 7 Li and 6 Li NMR confirm the Li‐ions in two different crystallographic sites of the NASICON framework with 85% of the Li‐ions having a relatively higher mobility than the other 15%. The anode–electrolyte interface is further investigated with symmetric Li/LMZP/Li cell testing, while the cathode–electrolyte interface is explored with an all‐solid‐state Li/LMZP/LiFePO 4 cell. The enhanced performance of these cells enabled by the Li 1.2 Mg 0.1 Zr 1.9 (PO 4 ) 3 solid electrolyte is stable upon repeated charge/discharge cycling.

Sponsoring Organization:
USDOE
OSTI ID:
1804790
Journal Information:
Small Methods, Journal Name: Small Methods Vol. 4 Journal Issue: 12; ISSN 2366-9608
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
United States
Language:
English

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