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Method to produce multilayer crystalline graphene (GRAL) for use in lithium-ion batteries

21.10.2015

The unique physical and chemical properties arising from graphene may lead to remarkable advantages in the fields of electronics and energy storage devices. Its superior electronic conductivity and the single-to few-atoms thickness are particularly appealing for the use as anode material for lithium-ion batteries. Graphene ́s electrochemical properties, relevant for its use in batteries, are strongly depending on its synthesis. The innovative method object of this invention is a n ionic liquid-assisted microwave exfoliation of expanded graphite. It allows the bulk production of high-quality multilayer crystalline graphene flakes. Used as anode material in lithium-ion batteries, at low temperatures (< 0°C) it shows advanced lithium-ion storage performance, when compared with commercially available graphite.

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