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US 4,440,835 AGranted
Thin non-flat gas electrode, current collector and process of manufacture
AssigneeSociete les Piles Wonder
InventorRene Vignaud
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AssigneeSociete les Piles Wonder
InventorRene Vignaud
Estimating the term…
The invention relates to a process for manufacturing an electrode, particularly a thin gas electrode of any non flat shape, characterized in that an homogeneous mixture is prepared of dry particles of active compounds, formed by at least one compound with electrocatalytic activity and possibly by at least one compound presenting electronic conductivity, and dry polytetrafluorethylene fibers, a lubricant is added and possibly a surfactant so as to cause coating of the particles of the mixture with the lubricant, and the lubricated particles of the mixture are shaped to form the electrode. Thus, electrodes of different shapes are obtained, for example a glove finger shape. The invention also relates to a process for preparing a current collector for an electrochemical device electrode, characterized in that there is deposited, on at least a part of the surface of this electrode, a thin porous metal film adhering to the electrode. The deposit is formed by metal plating and it may be advantageously formed from nickel or copper, having a thickness between 0.01 mm and 5 mm; preferably of the order of 0.05 mm.
A process for manufacturing an electrode, particularly a thin gas electrode of any non-flat shape, said process comprising preparing a homogeneous mixture of dry particles of active compounds, said homogeneous mixture comprising at least one compound with electrocatalytic activity or at least one compound with electrocatalytic activity and at least one compound presenting electronic conductivity, and dry fibers of polytetrafluorethylene, adding a lubricant or a mixture of a lubricant and a surfactant so as to cause coating of the particles of the mixture with the lubricant, and shaping the lubricated particles of the mixtute so as to form the electrode.
An electrode, particularly a thin gas electrode, of any desired shape obtained by preparing a homogeneous mixture of dry particles of active compounds, formed by at least one compound with electrocatalytic activity or at least one compound with electrocatalytic activity and at least one compound presenting electronic conductivity, and dry polytetrafluorethylene fibers, by adding a lubricant or a mixture of a lubricant and of a surfactant, so as to cause coating of the particles of the mixture by the lubricant, shaping the lubricated particles of the mixture and eliminating the lubricant.
A process for preparing a current collector for an electrode, said process comprising depositing, on at least a part of the surface of this electrode, a thin porous metal film, adhering to said electrode, the deposition being carried out by electroplating on said electrode, said electrode obtained by preparing a homogeneous mixture of dry particles of active compounds, said homogeneous mixture comprising at least one compound with electrocatalytic activity or at least one compound with electrocatalytic activity and at least one compound presenting electronic conductivity, and dry polytetrafluorethylene fibers, adding a lubricant or a mixture of a lubricant and of a surfactant, so as to cause coating of the particles of the mixture by the lubricant, shaping the lubricated particles of the mixture and eliminating the lubricant.
Dependencies are inferred from the claim text.