METHOD FOR PRODUCING SOLID ELECTROLYTE

PROBLEM TO BE SOLVED: To provide a method for producing a solid electrolyte, in which the solid electrolyte, that has stable composition and a dense structure and comprises a compact of a lithium-lanthanum-zirconium-based compound oxide, is produced without using a molding aid such as an aluminum co...

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Bibliographic Details
Main Author DOHATA HIDEO
Format Patent
LanguageEnglish
Japanese
Published 13.08.2015
Subjects
ARTIFICIAL STONE
BASIC ELECTRIC ELEMENTS
CABLES
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
CONDUCTORS
ELECTRICITY
INSULATORS
LIME, MAGNESIA
METALLURGY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
REFRACTORIES
SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES
SLAG
TREATMENT OF NATURAL STONE
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Summary:PROBLEM TO BE SOLVED: To provide a method for producing a solid electrolyte, in which the solid electrolyte, that has stable composition and a dense structure and comprises a compact of a lithium-lanthanum-zirconium-based compound oxide, is produced without using a molding aid such as an aluminum compound and while reducing the risk of eliminating lithium during sintering.SOLUTION: The method for producing the solid electrolyte comprising the compact of the lithium-lanthanum-zirconium-based compound oxide comprises: first steps of pulverizing/mixing a lanthanum compound and a zirconium compound, compacting an obtained mixture into a predetermined shape and sintering an obtained compact (a first sintering step); and second steps of impregnating a sintered compact comprising an obtained lanthanum-zirconium compound oxide with a lithium compound, and sintering the lithium compound-impregnated compact (a second sintering step). Since this solid electrolyte is capable of being molded into an optional shape, is the dense structure and has a large capacitance, this solid electrolyte is suitably used as the solid electrolyte of an Li ion secondary battery or the like. 【課題】アルミニウム化合物などの成形助剤を用いる必要がなく、また焼成中にリチウムが消失する恐れが少なく、安定した組成で、かつ緻密な構造を有する、リチウムランタンジルコニウム系複合酸化物の成形体からなる固体電解質の製造方法を提供する。【解決手段】リチウムランタンジルコニウム系複合酸化物の成形体からなる固体電解質の製造方法であって、ランタン化合物とジルコニウム化合物とを粉砕混合し、混合物を所定の形状に成形した後、該成形体を焼成し（第１焼成工程）、得られたランタンジルコニウム複合酸化物からなる成形焼結体に、リチウム化合物を含浸し、焼成する（第２焼成工程）ことを特徴とする固体電解質の製造方法である。固体電解質は、任意の形状に成形でき、緻密な構造体であり電気容量が大きいので、Ｌｉイオン二次電池等の固体電解質としての使用に好適である。【選択図】なし
Bibliography:Application Number: JP20140019464