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Tohoku University Technology: Highly crystalline carbon production method, its precursor and its production method: T20-1564

Possible to produce highly crystalline carbon from sustainable resource raw material

So far, crystalline carbon material with relatively large crystallite size and relatively small average interplanar spacing has been used as anode material for lithium-ion secondary battery and catalyst material for cathode in fuel cell. This highly crystalline carbon material is made from raw materials such as hyper-eutectoid molten pig iron, natural graphite and kish graphite. However, these raw materials are depletable resources and could be depleted in the future.　 　This invention is able to provide a highly crystalline carbon production method, its precursor production method and the precursor itself, using sustainable resources as raw material. This invention has a precursor production process in which at least one of iron, nickel or cobalt is impregnated into the raw material containing biomass which is a sustainable resource, followed by heat treatment to obtain a precursor, and a carbonization process in which the precursor is carbonized by heating and then washed by acid. This invention allows the production of highly crystalline carbon and its precursor.