Effects of design parameters in paper type GDL (Gas Diffusion Layer) are analyzed by experiments, which are hydrophobic treatment by PTFE, MPL (Micro Porous Layer) and carbon matrix density. Results show that hydrophobic treatment with 5% PTFE decreases concentration overpotential, but with 20% PTFE increases it at higher current density region. MPL makes concentration overpotential lower at higher current density region, in spite of the lower Gurley number by 1/80. Moreover, MPL decreases IR overpotential by improving electrical contact between electrode and GDL under lower contact pressure. To increase Gurley number by reducing matrix density makes concentration overpotential lower.
|Number of pages||6|
|Journal||Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B|
|Publication status||Published - Mar 2006|
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanical Engineering