NEGATIVE ELECTRODE ACTIVE SUBSTANCE AND PRODUCTION METHOD THEREFOR

The present invention addresses the issue of providing a negative electrode active substance having excellent charge/discharge characteristics (charge/discharge capacity, initial coulombic efficiency, and cycle characteristics). This issue is solved by providing a negative electrode active substance...

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Main Authors KATO Shinji, IKUMA Takahito, KUROKI Katsuhito, KIYOOKA Ryuuichi, ZHU Peixin, KATANO Satoshi
Format Patent
LanguageEnglish
French
German
Published 07.10.2020
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Summary:The present invention addresses the issue of providing a negative electrode active substance having excellent charge/discharge characteristics (charge/discharge capacity, initial coulombic efficiency, and cycle characteristics). This issue is solved by providing a negative electrode active substance that includes silicon (0 valence) (b) and a silicon-based inorganic compound (a) comprising silicon (excluding 0 valence), oxygen, and carbon, said negative electrode active substance being characterized by the equivalent composition ratio [Q units/(D units + T units + Q units)], indicating the carbon bonding state (D units [SiO2C2], T units [SiO3C], Q units[SiO4]) of the silicon (excluding 0 valence) present in the silicon-based inorganic compound (a), being 0.30 to 0.80.
Bibliography:Application Number: EP20180882580