AMORPHOUS LITHIUM ION-CONDUCTIVE OXIDE POWDER AND METHOD FOR PRODUCING THE SAME, AND METHOD FOR PRODUCING LITHIUM ION-CONDUCTIVE POWDER HAVING NASICON-TYPE CRYSTAL STRUCTURE

• Main Author: AIZAWA MICHIO
• Format: Patent
• Language: English; Japanese
• Published: 01.07.2021
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CHEMISTRY; COMPOUNDS THEREOF; CONDUCTORS; ELECTRICITY; INORGANIC CHEMISTRY; INSULATORS; METALLURGY; NON-METALLIC ELEMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES

To provide: an amorphous lithium-ion-conducting oxide powder which, upon crystallization, becomes a lithium-ion-conducting oxide powder having a NASICON-type crystal structure and exhibits high ionic conductivity; a method for producing amorphous lithium-ion-conducting oxide powder with low raw material cost and production cost; and a lithium-ion-conducting oxide powder having a NASICON-type crystal structure that exhibits higher ionic conductivity.SOLUTION: An amorphous lithium-ion conducting oxide powder containing lithium in an amount of 0.5-6.5 mass%, aluminum in an amount of 0-25.0 mass%, germanium in an amount of more than 0 mass% and at most 65.0 mass%, phosphorus in an amount of 10-30 mass%, and carbon in an amount of more than 0 mass% and at most 0.35 mass%, and having a specific surface area of 15 m2/g to 100 m2/g as measured by the BET single point method.SELECTED DRAWING: Figure 1 【課題】結晶化することによりＮＡＳＩＣＯＮ型結晶構造のリチウムイオン伝導酸化物粉末となり、高いイオン伝導度を発揮する、非晶質リチウムイオン伝導酸化物粉末と、当該非晶質リチウムイオン伝導酸化物粉末を安価な原料コストと生産コストによって製造する製造方法と、より高いイオン伝導度を発揮するＮＡＳＩＣＯＮ型結晶構造のリチウムイオン伝導酸化物粉末とを提供する。【解決手段】リチウムを、０．５質量％以上６．５質量％以下、アルミニウムを、０質量％を超え２５．０質量％以下、ゲルマニウムを、０質量％を超え６５．０質量％以下、リンを、１０質量％以上３０質量％以下、炭素を、０質量％を超え０．３５質量％以下含有し、ＢＥＴ一点法で計測される比表面積が１５ｍ2／ｇ以上１００ｍ2／ｇ以下である、非晶質リチウムイオン伝導酸化物粉末を提供する。【選択図】図１