Mitsubishi Chemical Corporation

Mitsubushi Chemical Corporation

Tadashi Ishihara

Takashi Kameda

Manabu Hayashi

Masakazu Yokomizo

Tomiyuki Kamada

Hideharu Satoh

A negative electrode for a nonaqueous electrolyte secondary battery having a small surface film resistance and a high negative electrode strength, wherein the negative electrode includes a collector and an active material layer formed thereon, wherein the active material layer contains an active material and a binder composition, wherein the active material is a material in which metal oxide fine particles having an average particle diameter of 250 nm or less are attached to the surface thereof, and wherein the binder composition contains a binder having an olefinic unsaturated bond.

Negative electrode for nonaqueous electrolyte secondary battery and nonaqueous electrolyte secondary battery using the same

A lithium secondary battery with high-output/high-input characteristics which has a long life, and is highly safe contains a negative electrode of a negative-electrode active material. In a dispersion prepared by dispersing 100 g of the active-material powder in 200 g of water together with 2 g of carboxymethyl cellulose, the particle diameter at which particles begin to appear is 50 &#x3bc;m or smaller when the dispersion is examined by the grind gauge method for determining the degree of dispersion in accordance with JIS K5400.

Negative-electrode active material for lithium secondary battery, negative electrode for lithium secondary battery, and lithium secondary battery

A carbonaceous material has a plane space d002 of a (002) plane less than 0.337 nm in an X-ray wide angle diffraction method, a crystallite size (Lc) of 90 nm or higher, an R value, as a peak intensity ratio of a peak intensity of 1360 cm to a peak intensity of 1580 cm in a Raman spectrum in use of an argon ion laser, of 0.20 or higher, and a tap density of 0.75 g/cm or higher. Also disclosed is a multilayer structure carbonaceous material for electrode, which is manufactured by carbonizing some organic compounds where the carbonaceous material for electrode is mixed with the organic compounds. The battery using the carbonaceous material for electrode or the multilayer structure carbonaceous material for electrode has a large capacity, a small irreversible capacity admitted in the initial cycle, excellent capacity maintaining rate of the cycle, and particularly, largely improved quick charging and discharging characteristics.

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Tokyo, Japan

Tadashi Ishihara