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    PROCESS FOR PRODUCING POROUS METAL BODIES
    5.
    发明专利
    PROCESS FOR PRODUCING POROUS METAL BODIES 未知

    公开(公告)号：DE3365052D1

    公开(公告)日：1986-09-11

    申请号：DE3365052

    申请日：1983-02-22

    Applicant: COMP GENERALE ELECTRICITE

    Inventor： DUPERRAY GERARD ,  HILAIRE MICHEL

    IPC: B22F5/00 ,  B22F3/10 ,  B22F3/11 ,  C22C1/08 ,  H01M4/80 ,  H01M4/82

    Abstract: A porous metal body, e.g. an electrode for an electric cell, is prepared using the following steps: preparing a foam by adding a surface active agent and a gelling agent to water and then foaming the mixture by stirring and/or blowing air through it; incorporating metal powder in the foam in order to obtain a suspension of the metal therein; shaping the foam with its suspension of metal, and adding a stabilizing agent thereto, said stabilizing agent being one which polymerizes on contact with water, thereby causing the shaped foam to set in shape; and heating the set foam to pyrolize the organic material therein and to sinter the metal. This method produces a more even and a more reliable pore size than has previously been possible.

    Air electrode for electrochemical accumulators - has active mass contg. graphitised carbon, nickel, and polymer binder, used esp. in zinc air accumulator
    6.
    发明专利
    Air electrode for electrochemical accumulators - has active mass contg. graphitised carbon, nickel, and polymer binder, used esp. in zinc air accumulator 未知

    公开(公告)号：FR2488450A1

    公开(公告)日：1982-02-12

    申请号：FR8017541

    申请日：1980-08-08

    Applicant: COMP GENERALE ELECTRICITE

    Inventor： DUPERRAY GERARD ,  MARCELLIN GEORGES

    IPC: D01F9/127 ,  H01M4/96

    Abstract: Air electrode has an active mass contg. a binder; carbon powder (I) with a graphitisation index above 0.2 and a specific surface (SS) of 10-60 sq.m/g.; 15-25 wt.% Ni and 15-25 wt.% C (II) with a low density. (I) is pref. obtd. by pyrolysing CO contg. 0-30 vol.% CO2 at 550-700 deg.C on an Ni or Fe-Ni catalyst; or by using the same process to pyrolise CH4 contg. 0-30 vol.% H2; or by milling graphite. The air electrode is pref. coated on one surface with 10-30 g/sq.m. of Ni providing protection, and on the other surface with a porous hydrophobic layer of PTFE. Two such electrodes are pref. used in a sec. cell with a middle Zn electrode and an outer polymer frame. This electrode resists anodic corrosion caused by the release of oxygen, and also expansion during repeated charging and discharging.

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