Carbon material, carbonaceous material for battery electrode, and battery

A technology of battery electrodes and carbon materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of natural graphite deformation, reduced electrode performance, poor cycle characteristics, etc., and achieves high reversibility, excellent productivity, high Effects of Coulombic Efficiency

Inactive Publication Date: 2014-09-10
SHOWA DENKO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When charging with such an electrode, the electrode expands in only one direction, reducing the performance as an electrode
It is proposed to granulate natural graphite into a spherical shape, but the spheroidized natural graphite is deformed and oriented due to the pressing during electrode production
In addition, due to the surface activation of natural graphite, a large amount of gas is generated during the first charging, and the initial efficiency is low, and the cycle characteristics are not good.

Method used

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  • Carbon material, carbonaceous material for battery electrode, and battery
  • Carbon material, carbonaceous material for battery electrode, and battery
  • Carbon material, carbonaceous material for battery electrode, and battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0207] Atmospheric pressure distillation of crude oil produced in Liaoning Province, China (API28, wax content 17%, sulfur content 0.66%), relative to the heavy fraction, using a sufficient amount of Y-type zeolite catalyst, and performing fluidized bed distillation at 510°C and normal pressure catalytic cracking. Solid content such as a catalyst was centrifuged until the obtained oil became clear, and decanted oil 1 was obtained. This oil was put into a small delayed coking process. Maintain the drum inlet temperature at 505°C and the drum internal pressure at 600kPa (6kgf / cm 2 ) for 10 hours, and then water-cooled to obtain a black block. Crush the obtained black lump with a hammer to a maximum of about 5 cm, and then use a rotary kiln (electrically heated external heating type, alumina SSA-Sφ120mm inner tube) with the outer wall temperature set at the center of the inner tube at 1450°C, Heating was performed by adjusting the feeding amount and inclination angle of the bl...

Embodiment 2

[0216] Coal tar derived from bituminous coal is subjected to atmospheric distillation at 320°C to remove fractions below the distillation temperature. The obtained tar with a softening point of 30° C. was filtered at 100° C. to remove insoluble matter, and a viscous liquid 1 was obtained. Throw it into a small delayed coking process. Maintain the drum inlet temperature at 510°C and the drum internal pressure at 500kPa (5kgf / cm 2 ) for 10 hours, and then water-cooled to obtain a black block. Crush the obtained black lump with a hammer to a maximum of about 5 cm or less, and then use a rotary kiln (electrically heated external heating type, alumina SSA-Sφ120mm inner tube) with the outer wall temperature at the center of the inner tube set at 1450°C , adjust the feeding amount and inclination angle of the black block in a manner that the residence time is 15 minutes, and heat it.

[0217] The obtained red-hot sample was cooled in the SUS container by the same method as in Exam...

Embodiment 3

[0224] Atmospheric distillation of crude oil produced in Iran (API30, 2% wax content, 0.7% sulfur content), relative to the heavy fraction, using a sufficient amount of Y-type zeolite catalyst, and performing fluidized catalytic cracking at 500 ° C and normal pressure . Solid content such as a catalyst was centrifuged until the obtained oil became clear, and decanted oil 2 was obtained. This oil was put into a small delayed coking process. Maintain the drum inlet temperature at 550°C and the drum internal pressure at 600kPa (6kgf / cm 2 ) for 10 hours, and then water-cooled to obtain a black block. Crush the obtained black lump with a hammer to a maximum of about 5 cm or less, and then use a rotary kiln (electrically heated external heating type, alumina SSA-Sφ120mm inner tube) with the outer wall temperature at the center of the inner tube set at 1450°C , adjust the feeding amount and inclination angle of the black block in a manner that the residence time is 15 minutes, and...

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Abstract

Provided is a flake-like carbon material that is suitable for use as an electrode material for an aqueous-electrolyte secondary battery. When the end surface of a particle of the carbon material is measured by using a micro-Raman spectrometer, the peak area (ID) of the peak measured in the 1300-1400 cm-1 range of the Raman spectrum, and the peak area (IG) of the peak measured in the 1580-1620 cm-1 range of the Raman spectrum have a IG/ID intensity ratio (G value) that is 5.2-100 inclusive. The average plane spacing (d002) of the (002) planes, as measured by X-ray diffractometry, is equal to or less than 0.337nm. The material has an optical structure of a specific shape. Also provided are a method for manufacturing the carbon material, a carbonaceous material for a battery electrode that includes the carbon material, a paste for an electrode, and a secondary battery that exhibits superior charge/discharge cycle properties and heavy-current carrying properties.

Description

technical field [0001] The present invention relates to a carbon material, a carbon material for a battery electrode and a battery. In more detail, it relates to a carbon material suitable as an electrode material for a nonaqueous electrolyte secondary battery, a carbon material for battery electrodes, and a secondary battery excellent in charge-discharge cycle characteristics and high-current load characteristics. Background technique [0002] Lithium-ion secondary batteries are mainly used as power sources for portable devices and the like. For portable devices and the like, functions are diversified and power consumption increases. Therefore, in lithium ion secondary batteries, it is required to increase the battery capacity and to improve the charge-discharge cycle characteristics. [0003] In addition, there is an increasing demand for high-output and large-capacity secondary batteries for power tools such as electric drills, and for hybrid vehicles. In this field, l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04H01M4/36H01M4/587
CPCH01M4/587C01B31/02Y02E60/122C01B31/04H01M4/133H01M4/364H01M10/0525C01B32/05C01B32/20Y10T428/2982Y02E60/10C01B32/225H01M4/36H01M4/1393
Inventor 胁坂安顕上条祐一安倍朋弘下平祥贵须藤彰孝外轮千明横山义史寺岛崇
Owner SHOWA DENKO KK
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