Coated carbon material, negative electrode, and secondary battery
AssigneeMitsubishi Chemical Corporation
InventorsKeiichi SEKI, Satoshi HIRAHARA, Miki IWADE, Tatsuya HASEGAWA, Keiji SHITO
Life of this patent
Estimating the term…
Abstract
An object is to provide a coated carbon material that can provide a secondary battery excellent in initial efficiency and high in peel strength, and as a result, to provide a high-performance secondary battery, and is achieved by a coated carbon material for a secondary battery, capable of intercalation/deintercalation a lithium ion, the carbon material having a specified coating film with an organic compound.
Claims11
A coated carbon material where a carbon material is coated with an organic compound, wherein a ratio Tol-SA/N2-SA of a BET specific surface area Tol-SA by toluene adsorption to a BET specific surface area N2-SA by nitrogen adsorption is 0.70 to 0.95.
A coated carbon material where a carbon material is coated with an organic compound, wherein a coating rate of a basal plane of the carbon material is 30% to 90%.
A coated carbon material where a carbon material is coated with an organic compound, wherein a ratio, basal plane specific surface area/Tol-SA, of a basal plane specific surface area by toluene adsorption to a BET specific surface area Tol-SA by toluene adsorption is 0.15 to 0.65.
A coated carbon material where a carbon material is coated with an organic compound, wherein a mass reduction rate from 200° ° C. to 700° C., as measured by TG-DTA, is 0.10% by mass to 0.42% by mass.
Dependencies are inferred from the claim text.