发明名称 |
METHOD OF PRODUCING AMORPHOUS CARBON MATERIAL FOR THE NEGATIVE ELECTRODE OF LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY |
摘要 |
An amorphous carbon material for lithium-ion secondary battery negative electrode is capable of reducing capacity degradation due to repeated charge and discharge cycles, storage while being charged, or floating charge.;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° C. to 1,500° 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. |
申请公布号 |
US2014161713(A2) |
申请公布日期 |
2014.06.12 |
申请号 |
US201313896825 |
申请日期 |
2013.05.17 |
申请人 |
JX NIPPON OIL & ENERGY CORPORATION ;TODA KOGYO CORP. |
发明人 |
SUZUKI Takashi;ISHIMARU Noriyo;OYAMA Takashi;TANO Tamotsu;ODA Toshiyuki;FUJINAGA (DECEASED) Ippei;URAI Tomoaki;OKAZAKI Seiji;KURATA Katsuaki;HIRAMOTO Toshiaki;SATO Akino;ODA Wataru |
分类号 |
H01M4/133 |
主分类号 |
H01M4/133 |
代理机构 |
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代理人 |
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主权项 |
1. A method for producing an amorphous carbon material for a negative electrode of a lithium ion secondary battery, comprising 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 subjected to the pulverizing and classifying to obtain a carbonized composition precursor; and heating the carbonized composition precursor under an inert atmosphere at a temperature from 900° C. to 1,500° 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 measured by X-ray wide-angle diffractometry.
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地址 |
Tokyo JP |