TUBULAR ELECTRODE ASSEMBLY, USE OF SUCH ASSEMBLY, MICROBIAL FUEL CELL COMPRISING SUCH ASSEMBLY AND PROCESS FOR CONVERTING LIGHT ENERGY INTO ELECTRICITY

The invention related to a tubular electrode assembly for use in a fuel cell comprising: -a central inner tubular air supply space; -an annular cathode surrounding the tubular air supply space; -an annular anode surrounding the cathode; -an oxygen-permeable layer that is impermeable for water between the tubular air supply space and the cathode; -an electrically-insulating, ion-permeable layer between the cathode and the anode; and -a first current collector attached to the anode and a second current collector attached to the cathode, wherein the first and the second current collectors are suitable for electrically connecting the anode with the cathode via an external electrically conductive path, wherein the central inner tubular air supply space is provided with an inlet for air that prevents water from entering the tubular air supply space. The invention further relates to use of such assembly in a fuel cell, to a microbial fuel comprising such assembly and to a process for converting light energy into electricity using such microbial fuel cell that makes use of organisms capable of photosynthesis.