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Carbonaceous electrode material for secondary battery

  • US 6,569,570 B2
  • Filed: 10/18/1999
  • Issued: 05/27/2003
  • Est. Priority Date: 02/06/1997
  • Status: Expired due to Term
First Claim
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1. A carbonaceous electrode material for a secondary battery, comprising:

  • a carbonization product of an aromatic condensation polymer formed by condensation of an aromatic compound having a phenolic hydroxy group and an aldehyde; and

    having an atomic ratio H/C between hydrogen atoms and carbon atoms of below 0.1, an average (002)-plane spacing of 0.365-0.395 nm as measured by X-ray diffraction method, a carbon dioxide adsorption capacity of at least 10 ml/g, and an X-ray scattering intensity ratio IW/ID of at least 0.25, wherein IW and ID represent scattering intensities as measured in a wet state and a dry state, respectively, at a parameter s=2·

    sin θ



    , of 0.5 nm

    1
    , wherein θ

    denotes a scattering angle and λ

    denotes a wavelength of X-rays in 2·

    sin θ



    of 0.5 nm

    1
    , wherein θ

    denotes a scattering angle and λ

    denotes a wavelength of X-rays in X-ray small-angle scattering measurement, and wherein the carbonaceous electrode material is particulate in form having an average particle diameter of at most 100 μ

    m.

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