| Parts | Size | Characteristics | Effective thermal conductivity [W/(m∙K)] |
| Polymer electrolyte membrane (PEM) | 50.0 mm × 50.0 mm × 0.051 mm (Nafion NRE-212) | Nafion NRE-212 (produced by Du Pont Corp.) | 0.195 |
| Catalyst layer | 50.0 mm × 50.0 mm × 0.01 mm | Pt/C (20 wt% Pt loading) | 0.27 |
| Microporous layer (MPL) | 50.0 mm × 50.0 mm × 0.003 mm | PTFE + carbon black | 1.00 |
| Gas diffusion layer (GDL) | 50.0 mm × 50.0 mm × 0.17 mm | Carbon paper (TGP-H-060 produced by Toray Corp.) | 1.7 |
| Separator | 75.4 mm × 75.4 mm × 2.00 mm (thickness of rib part: 1.00 mm) (Gas supply area: 50.0 mm × 50.0 mm) | Carbon graphite, Serpentine | 25 |