GRAPHENE-CONTAINING ELECTROCHEMICAL DEVICE
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United States of America Patent
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Issued Date -
Apr 30, 2015
app pub date -
Dec 17, 2013
filing date -
Oct 28, 2013
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Abandoned
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Abstract
A graphene-containing electrochemical device includes cathode/anode current collectors, cathode/anode active layers and a separator. The cathode/anode active layers are formed on the cathode/anode current collectors, and include a metal foil substrate and a graphene conductive layer. The graphene conductive layer includes several first graphene sheets and the polymer binder used to bind the first graphene sheets. The cathode/anode active layers include several second graphene sheets and cathode/anode active particles. The second graphene sheets and the cathode/anode active particles are bound by the polymer binder and further adhered to the graphene conductive layer. The second graphene sheets are blended among the cathode/anode active particles. The graphene conductive layer is employed to increase the compatibility between the cathode/anode active material and the metal foil substrate, and to reduce the junction resistance, thereby forming an integrated conductive network and improving the performance of the elements in the device.
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