Abstract: Graphite material capable of absorbing and desorbing lithium is used in the negative electrode material of a non-aqueous electrolyte secondary battery. The negative electrode material is bound by at least one type of material selected from the group consisting of ethylene-propylene-acrylic acid copolymers, ethylene-propylene-acrylate copolymers, ethylene-propylene-methyl acrylic acid copolymers, ethylene-propylene-methacrylic acid copolymers, ethylene-propylene-methacrylate copolymers, and ethylene-propylene-methyl methacrylic acid copolymers, in which the ethylene-propylene content of the binder is the range of 70-95%. A non-aqueous electrolyte secondary battery with a high anti-peeling strength of the electrode mix, superiority in the ease of handling, a high reliability in mass production, a superior low-temperature discharge characteristic and cycle characteristic is provided by using the negative electrode in combination with a rechargeable positive electrode and a non-aqueous liquid electrolyte.

Abstract: Enhancement of the storage property at a high temperature and discharge characteristics at a low temperature of a nonaqueous electrolyte secondary cell is intended. A negative electrode material which is prepared by covering the surface of a nucleus made of a graphite powder with a carbonaceous matter, the graphite powder having a specified plane interval, spectrum value, mean particle size, specific surface area, tapping density, and (110)/(004) X-ray peak intensity ratio, is used in the nonaqueous electrolyte secondary cell.

Abstract: A binder made of a mixture of a first binder component including styrene butadiene copolymer containing styrene at between 20% and 70%, and a second binder component selected from at least one of styrene butadiene copolymer containing styrene at between 80% and 100% and polystyrene is used for the negative electrode of rechargeable batteries comprising a carbon material and the binder. The use of the negative electrode comprising the carbon material and binder results in good resistance to peeling of a coated film, and thus ease of handling of a negative electrode sheet. Consequently, rechargeable batteries with good low-temperature discharge characteristics are supplied at good yield.

Abstract: Graphite powder for a negative electrode in prior arts, which allows lithium ions to repeat intercalation and deintercalation reversibly by charge and discharge, has failed to attain a specific capacity close to the theoretical capacity of 372 mAh per 1 g. Also, there was a problem in storage property at a high temperature when it is attempted to improve the high rate charge and discharge characteristics. An object of the present invention is to solve these problems. In the process of pulverizing flaky graphite particles of which plane interval (d002) of (002) plane is 3.350 to 3.

Abstract: Graphite material capable of absorbing and desorbing lithium is employed as the negative electrode material of a non-aqueous electrolyte secondary battery, the negative electrode material being bound by at least one type of material selected from the group consisting of polyethylene, ethylene-vinyl acetate copolymer, ethylene-propylene copolymer, ethylene-propylene-vinyl acetate copolymer, and polypropylene. A non-aqueous electrolyte secondary battery with a high anti-peeling strength of the electrode mix, superiority in the ease of handling, a high reliability in mass production, a superior low-temperature discharge characteristic and cycle characteristic is provided by employing the negative electrode in combination with a rechargeable positive electrode and a non-aqueous liquid electrolyte.

Abstract: Enhancement of the storage property at a high temperature and discharge characteristics at a low temperature of a nonaqueous electrolyte secondary cell is intended. A negative electrode material which is prepared by covering the surface of a nucleus made of a graphite powder with a carbonaceous matter, the graphite powder having a specified plane interval, spectrum value, mean particle size, specific surface area, tapping density, and (110)/(004) X-ray peak intensity ratio, is used in the nonaqueous electrolyte secondary cell.

Abstract: Enhancement of the storage property at a high temperature and discharge characteristics at a low temperature of a nonaqueous electrolyte secondary cell is intended. A negative electrode material which is prepared by covering the surface of a nucleus made of a graphite powder with a carbonaceous matter, the graphite powder having a specified plane interval, spectrum value, mean particle size, specific surface area, tapping density, and (110)/(004) X-ray peak intensity ratio, is used in the nonaqueous electrolyte secondary cell.