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Статья

NASICON Li<sub>1.2</sub>Mg<sub>0.1</sub>Zr<sub>1.9</sub>(PO<sub>4</sub>)<sub>3</sub> Solid Electrolyte for an All‐Solid‐State Li‐Metal Battery

Qiong ZhouMaterials Science and Engineering Program and Texas Materials Institute The University of Texas at Austin Austin TX 78712 USABiyi XuMaterials Science and Engineering Program and Texas Materials Institute The University of Texas at Austin Austin TX 78712 USAPo‐Hsiu ChienDepartment of Chemistry and Biochemistry Florida State University Tallahassee FL 32306 USAYutao LiMaterials Science and Engineering Program and Texas Materials Institute The University of Texas at Austin Austin TX 78712 USABing HuangState Key Lab of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 P. R. ChinaNan WuMaterials Science and Engineering Program and Texas Materials Institute The University of Texas at Austin Austin TX 78712 USAHenghui XuMaterials Science and Engineering Program and Texas Materials Institute The University of Texas at Austin Austin TX 78712 USANicholas S. GrundishMaterials Science and Engineering Program and Texas Materials Institute The University of Texas at Austin Austin TX 78712 USAYan‐Yan HuDepartment of Chemistry and Biochemistry Florida State University Tallahassee FL 32306 USAJohn B. GoodenoughMaterials Science and Engineering Program and Texas Materials Institute The University of Texas at Austin Austin TX 78712 USA
2020en
ABI

Аннотация

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.

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DOI
10.1002/smtd.202000764

Цитирования и источники

Цитирований: 2Использованных источников: 0
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