COMPOSITE CARBON PARTICLE AND LITHIUM-ION SECONDARY CELL USING SAME

A composite carbon particle for use in a negative electrode of a lithium-ion secondary battery, the composite carbon particle comprising a core particle composed of a carbon material obtained by heating, at not higher than 2500 °C, petroleum coke having a Hardgrove grindability index (HGI value) of...

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Bibliographic Details
Main Authors YOKOYAMA, YOSHIHITO, SOTOWA, CHIAKI, TAKEUCHI, MASATAKA
Format Patent
LanguageEnglish
French
German
Published 06.04.2016
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Summary:A composite carbon particle for use in a negative electrode of a lithium-ion secondary battery, the composite carbon particle comprising a core particle composed of a carbon material obtained by heating, at not higher than 2500 °C, petroleum coke having a Hardgrove grindability index (HGI value) of 30 to 60 (defined by ASTM D409), and a covering layer composed of a carbonaceous material obtained by heating an organic compound at 1000 °C to 2000 °C, wherein the composite carbon particle has a 50 % particle diameter (D50) of 1 µm to 30 µm in a volume-based cumulative particle size distribution as measured by laser diffraction method.
Bibliography:Application Number: EP20130844916