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    • 24. 发明授权
    • Treated carbon fibers with improved performance for electrochemical and
chemical applications
    • 经处理的碳纤维具有改善的电化学和化学应用性能
    • US5874166A
    • 1999-02-23
    • US708151
    • 1996-08-22
    • Xi ChuKimio Kinoshita
    • Xi ChuKimio Kinoshita
    • H01M4/58H01M4/62
    • H01M4/587H01M4/625Y10T428/292
    • A treated mesophase carbon fiber is disclosed having a high density of exposed edges on the fiber surface, and a method of making such a treated fiber. A carbon electrode is also described which is constructed from such treated mesophase carbon fibers. The resulting electrode, formed from such treated flexible carbon fibers, is characterized by a high density of active sites formed from such exposed edges, low corrosion, and good mechanical strength, and may be fabricated into various shapes. The treated mesophase carbon fibers of the invention are formed by first loading the surface of the mesophase carbon fiber with catalytic metal particles to form catalytic etch sites on a hard carbon shell of the fiber. The carbon fiber is then subject to an etch step wherein portions of the hard carbon shell or skin are selectively removed adjacent the catalytic metal particles adhering to the carbon shell. This exposes the underlying radial edges of the graphite-like layers within the carbon shell of the mesophase carbon fiber, which exposed radial edges then act as active sites of a carbon electrode subsequently formed from the treated mesophase carbon fibers.
    • 公开了在纤维表面上具有高密度的暴露边缘的处理的中间相碳纤维,以及制备这种处理过的纤维的方法。 还描述了由这种处理的中间相碳纤维构成的碳电极。 由这种处理的柔性碳纤维形成的所得电极的特征在于由这种暴露边缘形成的高密度的活性位点,低腐蚀性和良好的机械强度,并且可以制造成各种形状。 本发明的处理的中间相碳纤维通过首先将中间相碳纤维的表面与催化金属颗粒加载形成,以在纤维的硬碳壳上形成催化蚀刻位点。 然后对碳纤维进行蚀刻步骤,其中硬碳壳或皮肤的部分被选择性地除去附着在碳壳上的催化金属颗粒附近。 这暴露了中间相碳纤维的碳壳内的石墨状层的下面的径向边缘,其暴露的径向边缘然后作为随后由处理的中间相碳纤维形成的碳电极的活性位点。