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OwnerItaru Homma, Mitsuhiro Hibino +1inventors
InventorsItaru Homma, Mitsuhiro Hibino, Haoshen Zhou
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A carbon fine powder is obtained by uniformly coating the surface of a carbon fine powder having a large specific surface area with a uniform thin film layer of a metal oxide, metal nitride or metal carbide as an electrode active substance material through induction of a sonochemical reaction. It is found that the obtained carbon fine powder has a low electrical resistance and shows a rapid faradaic process (pseudo-capacitance) of the surface coating layer. The coated carbon fine powder, a process for producing the same, and a supercapacitor and a secondary battery using the carbon fine powder are disclosed.
A carbon fine powder coated with a metal oxide, a metal nitride or a metal carbide, in which a thin film layer of the metal oxide, the metal nitride or the metal carbide is uniformly coated on the surface of the carbon fine powder having a large specific surface area.
A process for producing a carbon fine powder coated with a metal oxide, a metal nitride or a metal carbide, which comprises irradiating an ultrasonic wave on a dispersion comprising a metal oxide fine particle, a metal nitride or metal carbide, a carbon fine particle and a solvent to cause a sonochemical reaction on the surface of the carbon fine particle to thereby uniformly forming a thin film layer of the metal fine particle on the surface of the carbon fine particle.
Dependencies are inferred from the claim text.