GRAPHITE ACTIVE ANODE MATERIAL FOR A LITHIUM SECONDARY BATTERY

By a method that comprises coking a residue resulting from distillation of crude oil under reduced pressure and having API gravity of 1 to 5, an asphaltene content of 10 to 50%, a resin content of 5 to 30%, and a sulfur content of 1 to 12% to obtain coke, pulverizing the coke to obtain a carbon powd...

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Bibliographic Details
Main Authors SOTOWA CHIAKI, TAMURA TAKAHIRO
Format Patent
LanguageEnglish
Korean
Published 24.04.2013
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Summary:By a method that comprises coking a residue resulting from distillation of crude oil under reduced pressure and having API gravity of 1 to 5, an asphaltene content of 10 to 50%, a resin content of 5 to 30%, and a sulfur content of 1 to 12% to obtain coke, pulverizing the coke to obtain a carbon powder, and heating the carbon powder at 1000 to 3500 deg C, a graphite anode active material for use in a lithium secondary battery is obtained that has, in X-ray powder diffraction, d 002 of not smaller than 0.3354 nm and not greater than 0.337 nm, Lc(004) of smaller than 100 nm, La(110) of not smaller than 100 nm, and a half width of the peak of a plane (101) at a diffraction angle (2¸) of 44 degrees to 45 degrees of not smaller than 0.65 degree.
Bibliography:Application Number: KR20137004157