DE1596284C3 - Mounting material for fuel element electrodes - Google Patents

Claims (2)

1 2 a certain amount of heat dissipation of the heat occurring during operation of the electrodes is achieved. The metal powder can consist of the same 1. Support material for fuel element material such as the electrodes or from electrically bes-electrodes from injection, molding or casting compounds 5 ser conductive material or from a metal Plastic base, thus made up of a marked powder mix. It is characterized by the fact that it consists of a mixture of The individual electrode frames are assembled with one or more fillers when assembling the battery through thin intermediate, whereby the thermal expansion coefficient disks are electrically isolated from each other,
of the mounting material to the thermal expansion. In a preferred embodiment, the voltage coefficients of the electrode are equal. corresponding areas of the bracket an isolating 2. Bracket material according to claim 1, there- rcnding paint, which when soon together characterized in that the filler or the menbau of a battery, the individual framed Elek-filler mixture is electrically conductive. troden connects to one another by adhesive action. 15 Expediently, for the external electrical connection of the electrodes to one another in a clamp or a connecting wire pressed in, injected or cast into the conductive frame,
ao Mixtures according to the invention between art The invention relates to a support material for fabric and filler are described below:
Electrodes of fuel elements from injection, _R. . . ₁ Plastic-based molding or casting compounds. Example l The porous electrodes for fuel elements for a conductive holder was a mixture are usually metallically conductive. At the edges 35 of 1 part by weight of acrylic glass powder and 3 parts, these electrodes are mechanically brittle and not made of Ni powder and then with the porous Nik gas and liquid-tight. They are therefore pressed together according to the kelelectrode,
various already known processes in a _R. . . " solid either electrically insulating or elec- Example 2. trically conductive bracket edged. Are known 30 A holder according to Example 1, but with Electrode holders made of plastics such as Plexi for improved electrical conductivity of the frame Glass or epoxy resin or metal mounts were made by using as a starting material len, e.g. B. nickel or magnesium. a mixture of 1 part by weight acrylic powder, When pressing in or injecting and when loading, 2 parts by weight of Ni powder and 1 part by weight of drive of the electrodes result in these known powder was produced,
th brackets temperature stresses due to the _R. . . different thermal expansion coefficients B e 1 s ρ 1 e of holder and electrode material. This tem- To make a non-conductive bracket Temperature tensions can often - in particular, the acrylic powder was mixed with ceramic powder at changing temperatures, which are mixed at In- and 4 °. 1 part by weight of acrylic powder shutdown of the fuel cells were mixed with 3 parts by weight of aluminum oxide.
- lead to leakage. . The coefficient of thermal expansion of the porous This disadvantage is made possible by means of the invention. Electrodes can easily be assessed by simple experiments Eliminates mounting material, which is averaged out. a matched mixture of plastic with 45 The coefficient of thermal expansion consists of one or more fillers, with the plastics provided with substances also being able to determine the coefficient of thermal expansion of the mounting material through experiments or on the basis of literatures the coefficient of thermal expansion of the elements,
trode equals. It. for example, on »plastics«, yours The filler or fillers can be made from non-conductive 5 ° Use in industry and technology, by Dr.-Ing. Materials, e.g. ceramic dust, consist of or consist of Erich Wandeberg, Springer Verlag Berlin / Göt-Ieitenden Materials, e.g. B. metal powders. tingen / Heidelberg, 1959, pp. 188, 189, referenced. Ever The particular advantage of adding Iei to the filler content can be seen to be the heat-absorbing Material consists in the fact that thereby both voltage coefficient of the mounting material to the a simple and safe electrically conductive connection made to the electrodes and also adjust terials.