SOLID ELECTROLYTE MATERIAL AND ALL SOLID LITHIUM ION SECONDARY BATTERY

There are provided a solid electrolyte material having high density and ion conductivity, and an all solid lithium ion secondary battery using the solid electrolyte material. The solid electrolyte material has a garnet-related structure which has a chemical composition represented by Li 7-x-y La 3 Z...

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Bibliographische Detailangaben
Hauptverfasser:	TAKAMORI Chika, KATAOKA Kunimitsu, ISHIZAKI Haruo, AKIMOTO Junji
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS CABLES CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F CONDUCTORS ELECTRICITY INORGANIC CHEMISTRY INSULATORS METALLURGY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES
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Beschreibung
Zusammenfassung:	There are provided a solid electrolyte material having high density and ion conductivity, and an all solid lithium ion secondary battery using the solid electrolyte material. The solid electrolyte material has a garnet-related structure which has a chemical composition represented by Li 7-x-y La 3 Zr 2-x-y Ta x Nb y O 12 (0¤x¤0.8, 0.2¤y¤1, and 0.2¤x+y¤1) and relative density of 99% or greater, and belongs to a cubic system. The solid electrolyte material has lithium ion conductivity which is equal to or greater than 1.0 x 10 -3 S/cm. The solid electrolyte material has a lattice constant a which satisfies 1.28 nm¤a¤1.30 nm, and has a lithium ion which occupies only two or more 96h sites in a crystal structure. The all solid lithium ion secondary battery includes a positive electrode, a negative electrode, and a solid electrolyte. The solid electrolyte includes the solid electrolyte material.