Jx Nippon Oil Energy Corporation

Nippon Oil Corporation

Nippon Petroleum Refining Company, Limited

Mt Carbon Co., Ltd.

Akio Sakamoto

Takashi Oyama

Tamotsu Tano

Ippei Fujinaga

Kazuhisa Nakanishi

Hiromitsu Hashisaka

Hideki Ono

Masaki Fujii

Kiwamu Takeshita

Keiji Higashi

Keizou Ikai

Toshitaka Fujii

Takashi Noro

Takashi Suzuki

Seiji Okazaki

Wataru Oda

Yoshiki Kubo

Kohei Yamaguchi

Yohei Yagishita

Masayuki Tasaki

Jun Ougiya

Akemi Inami

Miwa Katayama

Hiromitsu Hashizaka

A graphite material for a negative electrode of a lithium-ion secondary battery is provided. A ratio Lc(112)/Lc(006) defined as a ratio of expansion of graphene sheets to sheet displacement ranges from 0.08 to 0.11, both inclusive. A crystallite size Lc(006) calculated from a wide-angle X-ray diffraction line ranges from 30 nm to 40 nm, both inclusive. An average particle size ranges from 3 &#x3bc;m to 20 &#x3bc;m, both inclusive.

Graphite material for negative electrode of lithium-ion secondary battery, lithium-ion secondary battery including the graphite material, and method of manufacturing graphite material for lithium-ion secondary battery

Provided is a stock oil composition for a carbonaceous material for a negative electrode of a lithium-ion secondary battery which composition is useful for achieving excellent high-speed charge and discharge characteristics. The stock oil composition for a carbonaceous material for a negative electrode of a lithium-ion secondary battery uses a bottom oil of residue fluid catalytic cracking apparatus as a raw material. The stock oil composition comprises, of a saturated component, an aromatic component, a resin component and an asphaltene component detectable by development of the stock oil composition using thin-layer chromatography, the saturated component ranging from 30 to 50% by weight and the aromatic component ranging from 50 to 70% by weight; and has an average molecular weight of from 400 to 600.

Stock oil composition for carbonaceous material for negative electrode of lithium-ion secondary battery

The invention provides a stock oil composition for a carbon material for a negative electrode for a lithium ion secondary battery, having a 10 vol % distillation temperature of 280&#xb0; C. or higher as the distillation property, a density of at least 0.90 g/cmat a temperature of 15&#xb0; C. and a normal paraffin content of at least 3 parts by weight with respect to 100 parts by weight as the total weight of the stock oil composition; and having an aromatic component content of 30-85 parts by weight with respect to 100 parts by weight as the total weight of the stock oil composition and an aromatic component molecular weight of 250-1600 when the aromatic components and non-aromatic components are separated by elution chromatography.

Raw oil composition for negative electrode material for lithium ion secondary battery

In the raw coke composition of the invention, as the starting material for a negative electrode material of a lithium ion secondary battery, the ratio of the crystallite size Lc(002) and lattice constant co(002) (Lc(002)/co(002)) on the 002 plane is no greater than 180, and the ratio of the crystallite size La(110) and the lattice constant ao(110) (La(110)/ao(110)) on the 110 plane is no greater than 1500, as determined by X-ray diffraction upon graphitizing in an inert gas atmosphere at a temperature of 2800&#xb0; C.

Raw material charcoal composition for negative electrode material of lithium ion secondary battery and method for producing the same

To provide a negative electrode carbon material capable of suppressing capacity degradation which will occur due to repetition of a charge/discharge cycle, storage under a charged state, float charging, or the like. An artificial graphite for a negative electrode of a lithium secondary battery having a c-axis crystallite size L (112) of from 2.0 to 4.2 nm as calculated from a (112) diffraction line obtained by X-ray wide-angle diffractometry and having a half-value width &#x394;&#x3bd;of from 15 to 19 cmfor a peak appearing in a wavelength region of from 1580 cm&#xb1;100 cmin the Raman spectroscopy using an argon ion laser light having a wavelength of 5145 angstrom.

Carbon material for negative electrode of lithium secondary battery and method for producing the same

The present invention provides a raw coke having such a structure that the graphitized product resulting from graphitization of the raw coke at a temperature of 2800&#xb0; C. under an inactive gas atmosphere will have ratios of the crystallite size to the lattice constant of 360 or less in the (002) plane and 1500 or less in the (110) plane, as a raw coke providing active carbon produced by alkali-activating the raw coke, which is reduced in remaining alkali content and can simplify washing operation because washing liquid can easily pass through the activated carbon, or as a raw coke for the production of needle coke.

Raw coke for electricity storage carbon material and needle coke

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Tokyo, Japan

Akio Sakamoto