Jx Nippon Oil Energy Corporation

Nippon Oil Corporation

Nippon Petroleum Refining Company, Limited

Toda Kogyo Corporation

Toda Kyogo Corp.

Ippei Fujinaga

Takashi Oyama

Tamotsu Tano

Hideki Ono

Masaki Fujii

Hiromitsu Hashisaka

Akio Sakamoto

Kiwamu Takeshita

Kazuhisa Nakanishi

Keiji Higashi

Toshiyuki Oda

Seiji Okazaki

Wataru Oda

Tomoaki Urai

Katsuaki Kurata

Keizou Ikai

Akino Sato

Toshiaki Hiramoto

Toshitaka Fujii

Noriyo Ishimaru

Takashi Noro

Takashi Suzuki

Masayuki Tasaki

This disclosure concerns graphite materials having lattice distortion for lithium-ion secondary battery negative electrode obtained by a manufacturing method comprising the steps of: pulverizing and classifying a raw coke composition obtained from a heavy-oil composition undergone coking by delayed coking process, the raw coke composition having a H/C atomic ratio that is a ratio of hydrogen atoms H and carbon atoms C of 0.30 to 0.50 and having a micro-strength of 7 to 17 mass % to obtain powder of the raw coke composition; giving compressive stress and shear stress to the powder of the raw coke composition so that average circularity is 0.91 to 0.97 to obtain round powder; heating the round powder to obtain a carbonized composition; and graphitizing the carbonized composition.

Graphite material with lattice distortion for use in lithium-ion secondary battery negative electrodes, and lithium-ion secondary battery

A method for producing an amorphous carbon material for a negative electrode of a lithium-ion secondary battery includes the steps of; pulverizing and classifying a raw coke composition obtained from a heavy-oil composition undergone coking by delayed coking process to obtain powder of the raw coke composition, the raw coke composition having a H/C atomic ratio that is a ratio of hydrogen atoms H and carbon atoms C of 0.30 to 0.50 and having a micro-strength of 7 to 17 mass %; giving compressive stress and shear stress to the powder of the raw coke composition to obtain a carbonized composition precursor; and heating the carbonized composition precursor under an inert atmosphere at a temperature from 900&#xb0; C. to 1,500&#xb0; C. so that a size of a crystallite Lc(002) is in a range of 2 nm to 8 nm, the size being calculated from a (002) diffraction line obtained by X-ray wide-angle diffractometry.

Method of producing amorphous carbon material for the negative electrode of lithium ION secondary battery, and lithium ION secondary battery

A graphite material for a negative electrode is provided which can suppress capacity degradation due to repeated charging and discharging cycles, storage in a charged state, and floating charging. A method of manufacturing a graphite material for a negative electrode of a lithium ion secondary battery is provided in which an atomic ratio H/C of hydrogen atoms H and carbon atoms C in the raw coke composition is in a range of 0.30 to 0.50 and a microstrength of the raw coke composition is in a range of 7 wt % to 17 wt %.

Graphite material for negative electrodes of lithium ion secondary battery, manufacturing method for said material, and lithium ion secondary battery using same

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

The invention provides a stock oil composition for needle coke for a graphite electrode, the stock oil composition having a 10 vol % distillation temperature of 280&#xb0; C. or higher as the distillation property, and when separated into the aromatic component and non-aromatic component by elution chromatography, having an aromatic component content of 30-80 wt % with respect to the total weight of the stock oil composition and an aromatic component molecular weight of 255-1300, as well as a non-aromatic component normal paraffin content of at least 5 parts by weight with respect to 100 parts by weight of the aromatic component.

Process for producing needle coke for graphite electrode and stock oil composition for use in the process

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

The present invention provides a raw oil composition for manufacturing a carbon material for electric double layer capacitor electrodes, characterized in that the raw oil composition comprises 25 wt % or more of a saturated component and 16 wt % or less of an asphaltene component among the saturated component, an aromatic component, a resin component, and the asphaltene component obtained by developing of the raw oil composition by thin-layer chromatography; the raw oil composition has an average molecular weight of 960 or less; and the raw oil composition has an aromatic-carbon-fraction (fa) of 0.22 to 0.72. Use of the raw oil composition provides a carbon material for electric double layer capacitor electrodes that can exhibit high capacitance with high reproducibility without manufacturing synthetic pitch.

Raw oil composition for carbon material for electric double layer capacitor electrode

The present invention provides feedstock compositions for use of the production of an activated carbon for electric double layer capacitor electrodes or the production of needle coke, comprising a first heavy oil with an initial boiling point of 300&#xb0; C. or higher, an asphalten content of 12 percent by mass or less, a saturate content of 50 percent by mass or more and a sulfur content of 0.3 percent by mass or less, produced as a residue resulting from vacuum-distillation of a petroleum-based oil and a second heavy oil with an initial boiling point of 150&#xb0; C. or higher and a sulfur content of 0.5 percent by mass or less, produced by subjecting a hydrocarbon oil to fluidized catalytic cracking.

Feedstock composition and raw coke for electricity storage carbon material and needle coke

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Yamaguchi, Japan

Ippei Fujinaga