Fig. 6. CL and GDL hydrophobicity effects on AMFC performance.

a i-V and i-power density curves (10 mV s⁻¹ forward scans) at optimal conditions in AMFCs. The CL PTFE was increased from 0 to 8 wt% with constant ionomer/carbon ratio of 0.4. The GDL PTFE content was kept constant at 5%; (b) i-V and i-power density curves (10 mV s⁻¹ forward scans) at optimal condition in AMFCs. The GDL PTFE contents for both anode and cathode were tested at 5%, 10%, and 20%. The anode and cathode loading were 0.70 mg_PtRu cm⁻² and 0.60 mg_Pt cm⁻², respectively. The CLs PTFE mass content was kept at 0%. The membranes used in all tests were HDPE⁵. The cells were tested at 70 °C. The data is presented without iR-correction.