Microbial fuel cell, microbial fuel cell system, and method of using microbial fuel cell

摘要

The microbial fuel cell (1) includes an electrolyte (2) containing an organic substance, an anaerobic microorganism, a negative electrode (3) in contact with the electrolyte, a water repellent layer (41) and a water repellent layer. And a positive electrode (4) having a gas diffusion layer (42). The ratio of the area of the negative electrode to the area of the gas diffusion layer is T1, and the potential of the positive electrode in the electrode system with respect to the maximum current density of the negative electrode at the potential of the negative electrode in the electrode system composed of the electrolyte, the negative electrode, and the positive electrode Let T2 be the ratio of the maximum current density of the positive electrode. In this case, T1 and T2 satisfy the relationship of Expression (1). T21 / 2 ≦ T1 ≦ T22 (1)