Negative electrode active material and manufacturing method therefor, and negative electrode using negative electrode active material, and non-aqueous electrolyte secondary battery

Provided is a negative electrode active material characterized by a composition that includes silicon and an element (M) that can form a compound with silicon, and that first precipitates out a compound of silicon and the element (M) when the composition of silicon and the element (M) is cooled from...

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Main Authors MATSUSHITA MASASHI, UCHIKOSHI AKINARI, OMIGAWA YUU, YAMAZAKI SATOSHI, NISHIMURA TAKESHI, HIKAMI TOSHIYA, NAKAMURA KENICI, NISHIKUBO HIDEO, SASAKI HIROKAZU
Format Patent
LanguageChinese
English
Published 18.05.2016
Subjects
ALLOYS
BASIC ELECTRIC ELEMENTS
CASTING
CHEMISTRY
ELECTRICITY
FERROUS OR NON-FERROUS ALLOYS
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
METALLURGY
PERFORMING OPERATIONS
POWDER METALLURGY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WORKING METALLIC POWDER
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Summary:Provided is a negative electrode active material characterized by a composition that includes silicon and an element (M) that can form a compound with silicon, and that first precipitates out a compound of silicon and the element (M) when the composition of silicon and the element (M) is cooled from a molten state, and then precipitates out pure silicon or solid-solution silicon when cooled further. The negative electrode active material is characterized, electrochemically, by a first phase having Li occlusion properties being dispersed in a second phase having Li conductivity properties, and the first phase further including a third phase with weaker Li occlusion properties than the first phase.
Bibliography:Application Number: CN201480054169