Lithium lanthanum zirconium tantalum oxide garnet crystal and all-solid-state lithium ion secondary battery

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United States of America Patent

PATENT NO 10319985
APP PUB NO 20170324079A1
SERIAL NO

15522654

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Abstract

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There are provided a lithium-containing garnet crystal high in density and ionic conductivity, and an all-solid-state lithium ion secondary battery using the lithium-containing garnet crystal. The lithium-containing garnet crystal has a chemical composition represented by Li7-xLa3Zr2-xTaxO12 (0.2≤x≤1), and has a relative density of 99% or higher, belongs to a cubic system, and has a garnet-related structure. The lithium-containing garnet crystal has a lithium ion conductivity of 1.0×10−3 S/cm or higher. Further, this solid electrolyte material has a lattice constant a of 1.28 nm≤a≤1.30 nm, and lithium ions occupy 96h-sites in the crystal structure. The all-solid-state lithium ion secondary battery has a positive electrode, a negative electrode and a solid electrolyte, and the solid electrolyte is constituted of the lithium-containing garnet crystal according to the present invention.

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Patent Owner(s)

  • JAPAN AS REPRESENTED BY DIRECTOR GENERAL OF NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY MINISTRY OF ECONOMY TRADE AND INDUSTRY

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Akimoto, Junji Tsukuba, JP 20 14
Kataoka, Kunimitsu Tsukuba, JP 16 11

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