The invention relates to a porous electrode at least containing a porous catalytic layer, which layer at least contains 3-30 parts by weight of mouldable polymeric binder, 50-94 parts by weight of carbon particles and 3-47 parts by weight of hard hydrophobic polymer particles.
A porous gas diffusion electrode for membrane fuel cells on an ion-conducting polymer. The electrode contains a finely divided electrocatalyst which is dispersed in a proton-conducting ionomer and has a total porosity of more than 40 to less than 75%. It supplies considerably improved performance data in comparison to known electrodes. The electrode can be produced by using pore-forming materials which are dissolved during the re-protonation of the ion-conducting polymers with sulfuric acid or are decomposed by the action of temperature.
The invention relates to a conductive plastic material based on a thermoplastic resin and a carbon fill including both particles and fibers. The particles fill constitutes 30% to 50% by weight of the material, and the fiber fill constitutes not more than 10% by weight.
An electrochemical application that utilizes amorphous fluoropolymers providing a membrane electrode assembly that is durable, uniform and possesses a good structural integrity, produced by a method that avoids a long, complicated sintering of the fluoropolymers incorporated at undesirably high temperatures.
5273639 - Probe electrode - Owned by Agency of Industrial Science & Technology (Tokyo,JP) Ministry of International Trade & Industry (Tokyo,JP)
A method of making a probe electrode includes the steps of kneading a mixture of 75-80% by weight of a carbon material, 10-14% by weight of an organic binder and 7-9% by weight of mineral oil, forming the kneaded mixture into a predetermined shape, heating the shaped mixture in air the temperature of up to 300.degree. C. and raising the temperature in an atmosphere of inert gas up to 1000.degree. C.
A thermocell includes a negative electrode, such as a lead-acid electrode, and a porous oxygen (air) electrode disposed in a housing and separated by a separator. During discharge, oxygen is allowed to permeate through the oxygen electrode and separator to reach the negative electrode. Chemical oxidation of the negative electrode by oxygen in the presence of sulfuric acid yields water, lead sulfate, and heat. The heat can be used in many ways, such as warming up an adjoining automotive battery in winter, or as a personal heating pad. The heating rate is controlled by the rate of oxygen ingress. When not in use, the oxygen electrode is sealed by taping or by other means to stop ingress of oxygen. The used thermocell can be recharged by charging the negative electrode while evolving oxygen at the oxygen electrode.
