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AssigneeMaterials Innovation Tsukuba Incorporated
InventorsKun ZHANG, Hang YIN, Yukinori HATO
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The present invention provides an electrode material capable of realizing a lithium ion capacitor having high capacity and also excellent durability, and an electrode and a capacitor using the electrode material. An electrode is formed using an electrode material containing a composite 10 of graphene and carbon nanotubes, the composite having a ratio of carbon atoms to oxygen atoms (C/O) of 7 or more as measured by X-ray photoelectron spectroscopy and a carbon nanotube content of less than 20 mass % (excluding 0 mass %), and the electrode is used, for example, as a positive electrode to constitute a lithium ion capacitor.
An electrode material comprising a composite of graphene and carbon nanotubes, wherein the composite has a ratio of carbon atoms to oxygen atoms (C/O) as measured by X-ray photoelectron spectroscopy of 7 or more, and a carbon nanotube content of less than 20 mass % (excluding 0 mass %).
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Dependencies are inferred from the claim text.