Conductive silicon oxide powder, preparation thereof, and negative electrode material for non-aqueous electrolyte secondary cell
OwnerHirofumi Fukuoka, Satoru Miyawaki +3inventors
InventorsHirofumi Fukuoka, Satoru Miyawaki, Kazuma Momii, Mikio Aramata, Susumu Ueno
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Abstract
A conductive silicon oxide powder in which particles of silicon oxide having the formula: SiOx wherein 1≦x<1.6 are covered on their surfaces with a conductive carbon coating by chemical vapor deposition treatment is useful as a negative electrode active material to construct a lithium ion secondary cell having a high capacity and improved cycle performance.
Claims12
A conductive silicon oxide powder in which particles of silicon oxide having the general formula:
- SiOx wherein 1≦x<1.6 are covered on their surfaces with a conductive coating by chemical vapor deposition treatment.
A negative electrode material for a non-aqueous electrolyte secondary cell, comprising a mixture of the conductive silicon oxide powder of claim 1 and 1 to 60% by weight of a conductive agent, the mixture having a total carbon content of 25 to 90% by weight.
Dependencies are inferred from the claim text.