发明名称 |
Air electrode for electrochemical accumulators - has active mass contg. graphitised carbon, nickel, and polymer binder, used esp. in zinc air accumulator |
摘要 |
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. |
申请公布号 |
FR2488450(A1) |
申请公布日期 |
1982.02.12 |
申请号 |
FR19800017541 |
申请日期 |
1980.08.08 |
申请人 |
CIE GENERALE D ELECTRICITE |
发明人 |
GERARD DUPERRAY ET GEORGES MARCELLIN;MARCELLIN GEORGES |
分类号 |
D01F9/127;H01M4/96 |
主分类号 |
D01F9/127 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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