METHOD FOR PRODUCING ACTIVE MATERIAL, ACTIVE MATERIAL AND BATTERY

METHOD FOR PRODUCING ACTIVE MATERIAL, ACTIVE MATERIAL AND BATTERY

A main object of the present disclosure is to provide a novel active material of which volume change due to charge and discharge is small. The present disclosure achieves the object by providing a method for producing an active material having a composition represented by NaxMySi46(M is a metal elem...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: WASEDA, Tetsuya, OTOMO, Takamasa, KOSAKA, Daichi, YOSHIDA, Jun
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
BASIC ELECTRIC ELEMENTS
CHEMISTRY
COMPOUNDS THEREOF
ELECTRICITY
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:A main object of the present disclosure is to provide a novel active material of which volume change due to charge and discharge is small. The present disclosure achieves the object by providing a method for producing an active material having a composition represented by NaxMySi46(M is a metal element other than Na, x and y satisfy 0 < x, 0 ≤ y, y ≤ x, and 0 < x + y < 8), and a silicon clathrate I type crystal phase, the method characterized by comprising: a preparing step of preparing a precursor compound having the silicon clathrate I type crystal phase; and a liquid treatment step of bringing the precursor compound into contact with a polar liquid so as to desorb a Na element from the precursor compound and obtain the active material.