NEGATIVE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY COMPRISING SAME

An anode active material for a lithium secondary battery includes a silicon alloy that includes silicon and at least one kind of metal other than silicon, the silicon alloy allowing alloying with lithium. A volume of an inactive region in the silicon alloy, which is not reacted with lithium, is 50 t...

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Bibliographic Details
Main Authors JI, HYE-MIN, KIM, JE-YOUNG, KIM, KI-TAE, JUNG, DONG-SUB, LEE, YONG-JU
Format Patent
LanguageEnglish
French
German
Published 19.09.2012
Subjects
ALLOYS
BASIC ELECTRIC ELEMENTS
CHEMISTRY
ELECTRICITY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:An anode active material for a lithium secondary battery includes a silicon alloy that includes silicon and at least one kind of metal other than silicon, the silicon alloy allowing alloying with lithium. A volume of an inactive region in the silicon alloy, which is not reacted with lithium, is 50 to 75% of the entire volume of an active material. The anode active material has a large capacity in comparison to carbon-based anode active materials, and also ensures small volume expansion and high capacity retention ratio after charging/discharging, resulting in excellent cycle characteristics.
Bibliography:Application Number: EP20100830183