- Tytuł:
- Microstructure characterization of Nafion® HP JP as a proton exchange membrane for fuel cell: Positron annihilation study
- Autorzy:
-
Mohamed, Hamdy
Abdel-Hady, E.
Abdel-Hamed, M.
Said, M. - Powiązania:
- https://bibliotekanauki.pl/articles/1057926.pdf
- Data publikacji:
- 2017-11
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
78.70.Bj
82.47.Nj
72.80.Le
36.10.Dr
88.30.J-
88.30.pf - Opis:
- Free volume size V_{f} and proton conductivity σ of a novel polymer electrolyte membrane were investigated as a function of temperature and relative humidity up to 140°C and 80%, respectively. The free volume size V_{f} for Nafion® HP JP reflect the α-transition temperature at about 98°C. In addition the free volume size V_{f} for Nafion® HP JP is smaller than that for Nafion® NRE212 membrane which leads to lower methanol permeability of the former membrane. The proton conductivity σ for Nafion® HP JP decreases with increase of temperature up to transition temperature due to free and bound water loss, then it starts to increase due to dynamic segmental motion. It increases for Nafion® HP JP with the increase of the relative humidity. A good correlation between V_{f} and σ was successfully established for both membranes which indicates that σ is governed by the free volume. In conclusion, Nafion® HP JP is a suitable membrane for a proton exchange membrane fuel cell application.
- Źródło:
-
Acta Physica Polonica A; 2017, 132, 5; 1543-1547
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł