发明名称 |
Amorphous carbon material for negative electrode of lithium ion secondary battery and nonaqueous secondary battery comprising same |
摘要 |
Provided is an amorphous carbon material for a negative electrode of a lithium ion secondary battery. The amorphous carbon material comprises a size of a crystallite Lc(002) in c-axis direction ranging from 2.0 to 8.0 nm, the size being calculated from a (002) diffraction line of the amorphous carbon material measured by powder X-ray diffractometry; a carbon-derived spectrum appearing in a range from 3,200 to 3,400 gauss (G) in an electron spin resonance measured using X band; a relative signal intensity ratio (I4.8K/I40K) of the spectrum ranging from 2.4 to 3.5, wherein the relative signal intensity ratio is a ratio of signal intensity (I4.8K) at temperature of 4.8 K to signal intensity (I40K) at temperature of 40K; and a line width (ΔHpp) of the spectrum ranging from 70 to 180 gauss (G), wherein the line width is calculated from a first-order derivative spectrum at temperature of 4.8 K. |
申请公布号 |
US8802296(B2) |
申请公布日期 |
2014.08.12 |
申请号 |
US201313875820 |
申请日期 |
2013.05.02 |
申请人 |
JX Nippon Oil & Energy Corporation |
发明人 |
Ishimaru Noriyo;Suzuki Takashi;Kono Takefumi |
分类号 |
H01M4/133;C01B31/00;C01B31/02 |
主分类号 |
H01M4/133 |
代理机构 |
Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P. |
代理人 |
Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P. |
主权项 |
1. An amorphous carbon material for a negative electrode of a lithium ion secondary battery, the material comprising:
a size of a crystallite Lc(002) in c-axis direction ranging from 2.0 to 8.0 nm, the size being calculated from a (002) diffraction line of the amorphous carbon material measured by powder X-ray diffractometry; a carbon-derived spectrum appearing in a range from 3,200 to 3,400 gauss (G) in an electron spin resonance measured using X band; a relative signal intensity ratio (I4.8K/I40K) of the spectrum ranging from 2.4 to 3.5, wherein the relative signal intensity ratio is a ratio of signal intensity (I4.8K) at temperature of 4.8 K to signal intensity (I40K) at temperature of 40K; and a line width (ΔHpp) of the spectrum ranging from 70 to 180 gauss (G), wherein the line width is calculated from a first-order derivative spectrum at temperature of 4.8 K. |
地址 |
Tokyo JP |