Pressure-resistant fuel cell

A method for providing a carrier structure for electrodes of a fuel cell, the method comprising the following steps:

• providing a duct wall;
• providing a tubular ducting volume;
• and
• forming the tubular ducting volume from the duct wall, wherein the duct wall comprises an outer surface facing a surrounding and an inner surface facing the tubular ducting volume;
• configuring tubular ducting volume to conduct a first supply flow comprising an oxidant;
• configuring the duct wall to provide a second supply flow within the duct wall, the second supply flow comprising a reductant, wherein the duct wall separates the first supply flow in the tubular ducting volume from the second supply flow within the duct wall and the surrounding of the carrier structure;
• and
• applying a primary power coating layer on the inner surface of the duct wall for being arranged between the first supply flow and the second supply flow;
• wherein the primary power coating layer is configured for generating electrical energy from the first supply flow and the second supply flow;
• wherein the duct wall is configured to withstand pressure loads resulting from a pressure difference between the tubular ducting volume and the surrounding;
• and
• wherein a pressure in the tubular ducting volume is at least twice as large as a pressure in the surrounding.