Varta Batterie Aktiengesellschaft

Georg Ely

Rainer Bittihn

Friedrich Woeffler

An aluminum substrate, with its natural oxide film intact, is made suitable for the electrochemical deposition polymerization of the electrode-active organic material, and for further use as an electrolyte holder and a charge eliminator, by providing the aluminum substrate with an electron-conducting coating of Au, Pt, Ni, Cr, Cr-Ni or C. In blank form, following pickling in an alkali, the aluminum substrate can either directly receive the deposit, or can be prepared for this purpose by electrochemical coating with a corrosion-resistant heavy metal. The aluminum can be used in the form of a netting or expanded metal so as to achieve a particularly firm connection between the metal and the polymer, and so that the resulting mesh cavities can be used to incorporate the amount of electrolyte which is necessary for charging of the polymer electrode. This allows the use of a thinner separator as the electrolyte reservoir, improving the power density of the cell.

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Glashutten, Germany

Georg Ely