Abstract
This study investigated the electrode geometry and electrode materials for the cathode of a floating microbial fuel cell. A block-shaped cathode was created to improve physical strength, simplify the method of creation, and simplify the maintenance of the cathode’s position in relation to the water surface. The use of copper as the cathode was also expected to inhibit the formation of biofilms and activate redox reactions. As a result, the addition of copper to the cathode increased the power density by 6234% (10.1 μW/cm2 compared with 0.162 μW/cm2). Stable power generation for approximately two months was also confirmed. Furthermore, inexpensive rice husks and Bokuju (Japanese drawing ink) were used as the primary materials for the electrodes to reduce the cost.
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