COPPER FOIL FOR NEGATIVE ELECTRODE CURRENT COLLECTOR OF LITHIUM ION SECONDARY BATTERY

Electrodeposited copper foils having properties suitable for use as negative electrode current collectors in lithium-ion secondary batteries are disclosed. The copper foil has a yield strength in the range of 11 to 45 kg/mm2, and a difference in residual stress between the drum side and the deposite...

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Bibliographic Details
Main Authors CHOU, Jui-Chang, HUANG, Huei-Fang, LAI, Yao-Sheng, CHENG, Kuei-Sen
Format Patent
LanguageEnglish
French
German
Published 05.08.2020
Subjects
APPARATUS THEREFOR
BASIC ELECTRIC ELEMENTS
CHEMISTRY
ELECTRICITY
ELECTROFORMING
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
METALLURGY
PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Summary:Electrodeposited copper foils having properties suitable for use as negative electrode current collectors in lithium-ion secondary batteries are disclosed. The copper foil has a yield strength in the range of 11 to 45 kg/mm2, and a difference in residual stress between the drum side and the deposited side of at most 95 MPa. Negative electrode current collectors for lithium-ion secondary battery, a lithium-ion secondary battery incorporating the negative electrode, and batteries containing the negative electrode current collector are also disclosed.
Bibliography:Application Number: EP20200152064