University of Sistan and Baluchestan

تاریخ: 16 October 2019

Making of direct methanol fuel cell stock for the first time in Department of Chemical Engineering

Direct methanol fuel cell (DMFC) is an electrochemical device which converts chemical energy to electrical energy.  In order to compete with traditional batteries, a portable methanol fuel cell must be have a higher energy density. Water management is an important challenge for methanol fuel cells to achieve optimal energy levels. The amount of water in the fuel cell has a major impact on the performance of the fuel cell. One of the important issues in methanol fuel cells is the possibility of flooding in the cathode diffusion layer and channel due to the transfer of water through the membrane as well as the production of water by the cathode reaction. The formation of water in the cathode catalyst layer and its transmission through the cathode gas diffusion layer causes the oxygen mass transfer resistance of the cathode to the reaction area and thus reduce the limiting current density. An adequate amount of water at the cathode side is required to hydrate the polymer membrane. However, excessive amounts of water in the cathode lead to flooding and decrease the cathode performance.

Therefore, in this study, it was attempted for the first time to investigate the design and modeling of direct methanol fuel cell stack with two serpentine-parallel flow channels with circular bend in order to investigate water management in University of Sistan and Baluchestan fuel cell laboratory. And Baluchistan. This type of channel reduces pressure drop and uniform distribution of current on the electrode surface. The effects of various operating parameters such as operating temperature, methanol concentration, methanol crossover and oxygen flow rate were investigated both numerically and experimentally and the results were successful.