Patent ID: 8940449
Filing Date: 2015-01-27
Classification: H01M,Y02E

Abstract:
1. A fuel cell comprising: a power generation layer member for moving hydrogen ions from one surface to another surface, and causing the hydrogen ions to react with oxygen on the another surface; an oxygen supply layer having a porosity of at least 80% for diffusing oxygen in an atmosphere taken in from a side surface to supply the oxygen to the another surface; a diffusion layer between the power generation layer member and the oxygen supply layer; a current collector; and a water-absorbing layer between the oxygen supply layer and the current collector, wherein the side surface is a surface which is parallel to a direction of movement of an H ion in power generation, wherein the water-absorbing layer has an ability to hold liquid water that is higher than that of the oxygen supply layer, is communicated with the oxygen supply layer, and is placed opposed to the power generation layer member with at least the oxygen supply layer between the water-absorbing layer and the diffusion layer, wherein the water-absorbing layer is not in contact with the diffusion layer, wherein at least a part of the water-absorbing layer is directly opened to an atmosphere outside of the oxygen supply layer, and wherein supply of oxygen from the side surface from which oxygen is taken in to the power generation layer member depends upon natural diffusion of oxygen through the oxygen supply layer without using a fan.