A BINDER FOR LITHIUM ION RECHARGEABLE BATTERY CELLS

An electrode for a rechargeable battery cell includes a substrate, e.g., a current collector and a particulate silicon forming active material in the electrode, along with a cellulose based binder. At least one chelating agent is provided, the chelating agent being capable of binding to the metallic...

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Bibliographic Details
Main Author LOVERIDGE, MELANIE J
Format Patent
LanguageEnglish
French
German
Published 21.10.2015
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Summary:An electrode for a rechargeable battery cell includes a substrate, e.g., a current collector and a particulate silicon forming active material in the electrode, along with a cellulose based binder. At least one chelating agent is provided, the chelating agent being capable of binding to the metallic impurities, e.g., divalent and/or trivalent impurities. The binder is mixed with the silicon particles to form a cohesive mass that adheres to the substrate. It has been found that cellulose based binders can also be used in cells where the active material is silicon if a chelating agent is also incorporated. The electrode can be used in a lithium ion rechargeable battery cell.
Bibliography:Application Number: EP20100718652