Teijin Limited

Ryota Hirakawa

Kazuki Yachi

Takahiro Daido

Shinya Komura

Asami Kanematsu

Takashi Shiro

The present invention provides: a fibrous carbon characterized in that the average effective fiber length is 1-100 &#x3bc;m, and the crystallite length (La) measured using X-ray diffraction is 100-500 nm; an electrode mixture layer for a non-aqueous-electrolyte secondary cell, said mixture comprising an electrode active material and a carbon-based electroconductive auxiliary agent containing said fibrous carbon; an electrode for a non-aqueous-electrolyte secondary cell, the electrode comprising a collector and said electrode mixture layer for a non-aqueous-electrolyte secondary cell, the electrode mixture layer being laminated on the collector; and a non-aqueous-electrolyte secondary cell having said electrode for a non-aqueous-electrolyte secondary cell.

Fibrous carbon, method for manufacturing same, electrode mixture layer for non-aqueous-electrolyte secondary cell, electrode for non-aqueous-electrolyte secondary cell, and non-aqueous-electrolyte secondary cell

The present invention provides an electrode mixture layer for nonaqueous electrolyte secondary batteries, which contains an electrode active material, a carbon-based conductive agent containing fibrous carbon having an average effective length of 10 &#x3bc;m, and a binder, and which has a thickness of 50 &#x3bc;m or more. This electrode mixture layer has an inner layer portion where the fibrous carbon is three-dimensionally dispersed in a random manner.

Fibrous carbon-containing electrode mixture layer for nonaqueous electrolyte secondary batteries, electrode for nonaqueous electrolyte secondary batteries comprising same, and nonaqueous electrolyte secondary battery

The present invention provides pitch-based ultrafine carbon fibers that have an average fiber diameter of at least 100 nm and less than 700 nm, and an average fiber length of 10 &#x3bc;m or more, wherein C&#x2014;O bonds &#x3e;C&#x2550;O bonds in terms of the abundance ratio (molar ratio) of C&#x2014;O bonds and C&#x2550;O bonds derived from the O1s orbital as measured by X-ray photoelectron spectroscopy.

Pitch-based ultrafine carbon fibers, method for producing same, non-aqueous electrolyte secondary battery negative electrode using said pitch-based ultrafine carbon fibers, and non-aqueous electrolyte secondary battery having said non-aqueous electrolyte secondary battery negative electrode

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Osaka, Japan

Ryota Hirakawa