Jx Nippon Oil Energy Corporation

Nippon Oil Corporation

Nippon Petroleum Refining Company, Limited

Toda Kogyo Corporation

Jeol Ltd.

Toda Kyogo Corp.

Tamotsu Tano

Takashi Suzuki

Takashi Oyama

Ippei Fujinaga

Hideki Ono

Akio Sakamoto

Kiwamu Takeshita

Kazuhisa Nakanishi

Hiromitsu Hashisaka

Masaki Fujii

Keiji Higashi

Toshiyuki Oda

Keizou Ikai

Seiji Okazaki

Tomoaki Urai

Wataru Oda

Katsuaki Kurata

Toshitaka Fujii

Akino Sato

Toshiaki Hiramoto

Noriyo Ishimaru

Takashi Noro

Hiroshi Kobayashi

Keizo Ikai

Akinori Mogami

Hiroshi Ozawa

Masatoshi Nishida

Yukinori Kude

Masayuki Tasaki

Shiro Nakamo

Jun Ougiya

Makoto Takeuchi

Hiromitsu Hashizaka

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

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

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

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

A process is provided for producing petroleum coke that is high in strength and sufficiently small in thermal expansion coefficient and sufficiently suppressed from puffing. The process includes coking a feedstock containing a first heavy oil having a sulfur content of 1.0 percent by mass or less, a nitrogen content of 0.5 percent by mass or less, and an aromatic index of 0.1 or greater, produced by hydrodesulfurizing a heavy oil with a sulfur content of 1 percent by mass or more under conditions (1) where the total pressure is 10 MPa or greater and less than 16 MPa and the hydrogen partial pressure is 5 MPa or greater and 16 MPa or less or conditions (2) where the total pressure is 20 MPa or greater and 25 MPa or less and the hydrogen partial pressure is greater than 20 MPa and 25 MPa or less, and a second heavy oil with an aromatic index of 0.3 or greater and an initial boiling point of 150&#xb0; C. or higher.

Process for producing petroleum 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

The capacitance per volume of an electric double-layer capacitor can be increased by using a raw-material carbon composition for use in a carbon material for an electrode of the electric double-layer capacitor by applying an activation process, characterized in that the raw-material carbon composition has a volatile content of 1.3% by mass to 15% by mass (both inclusive), and microstrength of 5 to 30% when the volatile content is less than 6% by mass while microstrength of 5 to 20% when the volatile content is 6% or more.

Raw-material carbon composition for carbon material for electrode of electric double-layer capacitor

Growing community of inventors

Yamaguchi, Japan

Tamotsu Tano