JCIPRNET
Core-shell structure and production method therefof, composition for negative electrode using the core-shell structure as negative electrode active material, negative electrode and secondary battery
A material for a negative electrode active material having capability of achieving excellent cycle performance while maintaining satisfactory initial efficiency (initial capacity), a production method for the material, a composition for a negative electrode, using the material, a negative electrode, and a secondary battery. A core-shell structure that includes the following components (A) and (B), and satisfies the following conditions (i) and (ii): (A): a core containing at least Si (silicon), O (oxygen) and C (carbon) as a constituent element, and containing crystalline carbon and non-crystalline carbon as a constituent; and (B): a shell encapsulating the core, and including a SiOC structure having a graphene layer, and (i): having an atomic composition represented by formula SiOxCy (0.5<x<1.8, 1.0<y<5.0), and (ii): having a predetermined value of less than 1.0×105 Ω·cm in specific resistance determined by powder resistance measurement.
JNC CORPORATION JNC PETROCHEMICAL CORPORATION
H H C H H H H Y H H H H H H
H01M H01M C01B H01M H01M H01M H01M Y02E H01M H01M H01M H01M H01M H01M
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Hirotsuna Masakazu Yoshihito
Yamada Kondo Takano