Fine carbon fiber and method for producing the same
AssigneeShowa Denko K.K.
InventorsToshio Morita, Ryuji Yamamoto, Tomoyoshi Higashi, Katsuyuki Tsuji
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Abstract
A vapor grown fine carbon fiber including a hollow space along the fiber in its interior, and having a multi-layer structure, an outer diameter of 2 to 500 nm, and an aspect ratio of 10 to 15,000 is disclosed. The fiber has a center portion and a peripheral portion, and the center portion having a carbon structure different from that of the peripheral portion. A method for producing the fine carbon fiber, and a battery and gas occlusion material containing the fine carbon fiber are also disclosed.
Claims7
A method for producing a fine carbon fiber comprising thermally decomposing a carbon material in the presence of a catalyst fluid containing a solvent and fine particles of a catalyst dispersed therein, wherein the fine particles have a size of 20 nm or less, and the catalyst comprises a transition metallic compound comprising at least one element selected from the group consisting of Fe, Ni, and Co.
Dependencies are inferred from the claim text.