GRAPHITE MATERIAL FOR NEGATIVE ELECTRODES OF LITHIUM SECONDARY BATTERY, MANUFACTURING METHOD FOR SAID MATERIAL, AND LITHIUM SECONDARY BATTERY USING SAME

A graphite material for a negative electrode is provided which can suppress capacity degradation due to repeated charging and discharging cycles, storage in a charged state, and floating charging. A method of manufacturing a graphite material for a negative electrode of a lithium ion secondary batte...

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Main Authors OYAMA, TAKASHI, FUJINAGA, IPPEI, ISHIMARU, NORIYO, KURATA, KATSUAKI, TANO, TAMOTSU, ODA, TOSHIYUKI, OKAZAKI, SEIJI, ODA, WATARU, HIRAMOTO, TOSHIAKI, SUZUKI, TAKASHI, URAI, TOMOAKI, SATO, AKINO
Format Patent
LanguageEnglish
French
German
Published 04.05.2016
Subjects
BASIC ELECTRIC ELEMENTS
CHEMISTRY
COMPOUNDS THEREOF
ELECTRICITY
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Summary:A graphite material for a negative electrode is provided which can suppress capacity degradation due to repeated charging and discharging cycles, storage in a charged state, and floating charging. A method of manufacturing a graphite material for a negative electrode of a lithium ion secondary battery is provided in which an atomic ratio H/C of hydrogen atoms H and carbon atoms C in the raw coke composition is in a range of 0.30 to 0.50 and a microstrength of the raw coke composition is in a range of 7 wt% to 17 wt%.
Bibliography:Application Number: EP20110816479