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Secondary battery

  • US 4,668,595 A
  • Filed: 05/09/1986
  • Issued: 05/26/1987
  • Est. Priority Date: 05/10/1985
  • Status: Expired
First Claim
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1. A secondary battery comprising positive and negative electrodes, a separator, and a nonaqueous electrolyte, wherein said secondary battery is characterized by having as an active material for either of said positive and negative electrodes:

  • I;

    a composite oxide possessing a layer structure and represented by the general formula;

    
    
    space="preserve" listing-type="equation">A.sub.x M.sub.y N.sub.z O.sub.2 wherein A is at least one member selected from the group consisting of alkali metals, M is a transition metal, N is at least one member selected from the group consisting of Al, In, and Sn, and x, y, and z satisfy the expression, 0.05≦

    x≦

    1.10, 0.85≦

    y≦

    1.00, and 0.001≦

    z≦

    0.10, respectively, andII;

    an n-doped carbonaceous material which has a BET-method specific surface area, A (m2 /g), being in the range of 0.2<

    A<

    100 and a crystal thickness, Lc (Å

    ), based on X-ray diffraction and a true density, ρ

    (g/cm3), which satisfies the conditions, 1.70<

    ρ

    <

    2.18 and 10<

    Lc<

    120ρ

    -189.

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