The electrodes for energy conversion devices using gaseous fuels were formed by interconnection of electronic conductor, ionic conductor and fuels. Especially the formation of triple phase boundary in the electrodes of fuel cells is highly important to have good performance. Ionic conduting region in the electrodes was formed by solidifying aqueous polymeric dispersion coexsited with solid catalyst in slurry. Depending on the type of solvents to be able to disperse ion-conducting polymers, the structure of electrodes was significantly changed to result in different performance and durability. The durability of the electrodes is another important issue in fuel cells. In this study, ion-conducting polymers were dispersed in various solvent systems such as polar protic and/or polar aprotic solvents. All of the electrodes using various dispersions with different solvent systems were preapred and evaluated in terms of dynamic light scattering, i-v polarization, impedance, cyclic voltammetry and durability tests. As a result, the electrodes preapred by a dispersion with polar protic solvents showed higher performance and lower durability than the one with polar aprotic solvents.

Ion-conducting dispersions for the electrodes of energy conversion devices

252nd National Meeting (2016)

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