Negative Electrode Material for Lithium Battery, and Lithium Battery
First Claim
1. A negative electrode material for a lithium battery characterized by comprising a carbonaceous negative electrode active substance having a specific surface area of 1 m2/g or more, a binder formed of styrene-butadiene rubber and a carbon fiber having a fiber diameter of 1 to 1,000 nm.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention relates to a negative electrode material for a lithium battery characterized by comprising a carbonaceous negative electrode active substance having a specific surface area of 1 m2/g or more, a binder formed of styrene-butadiene rubber and a carbon fiber having a fiber diameter of 1 to 1,000 nm; and to a lithium battery using the negative electrode material, which has excellent characteristics, i.e., low electrode resistance, high electrode strength, excellent electrolytic solution permeability, high energy density, and good high-speed charging/discharging performance. The negative electrode material contains carbon fiber in the amount of 0.05 to 20 mass % and the binder formed of styrene-butadiene rubber in 0.1 to 6.0 mass %, and may further contain a thickner such as carboxymethyl cellulose in the amount of 0.3 to 3 mass %.
56 Citations
37 Claims
- 1. A negative electrode material for a lithium battery characterized by comprising a carbonaceous negative electrode active substance having a specific surface area of 1 m2/g or more, a binder formed of styrene-butadiene rubber and a carbon fiber having a fiber diameter of 1 to 1,000 nm.
-
22. A method for producing a composition for forming a negative electrode material for a lithium battery, comprising adding an aqueous styrene-butadiene rubber dispersion to a carbon fiber/active substance dispersion prepared by dispersing, in an aqueous thickener solution, a carbon fiber having a fiber diameter of 1 to 1,000 nm, a carbonaceous negative electrode active substance having a specific surface area of 1 m2/g or more;
- and stirring the resultant mixture.
- View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
- 30. A composition for forming a negative electrode material for a lithium battery, which composition comprises an aqueous thickener solution, wherein carbon fiber having a fiber diameter of 1 to 1,000 nm is dispersed.
Specification