کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1288848 | 973275 | 2011 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A polytetrafluoroethylene/quaternized polysulfone membrane for high temperature polymer electrolyte membrane fuel cells A polytetrafluoroethylene/quaternized polysulfone membrane for high temperature polymer electrolyte membrane fuel cells](/preview/png/1288848.png)
A polytetrafluoroethylene (PTFE)/quaternized polysulfone (QNPSU) composite membrane has been fabricated for use in proton exchange membrane fuel cells (PEMFCs). The composite membrane is made by immobilizing a QNPSU solution into a hydrophobic porous PTFE membrane. The structure of the composite membrane is examined by SEM and EDX. The ionic conductivity of the PTFE/QNPSU membrane, at a relative humidity lower than 0.5% and a temperature of 180 °C, is greater than 0.3 S cm−1, when loaded with 400% H3PO4. A hydrogen fuel cell with this membrane operating at 2.0 atmosphere absolute (atma) pressure and 175 °C gives voltages >0.4 V at current densities of 1.0 A cm−2 using oxygen.
Research highlights▶ We used a porous polytetrafluoroethylene (PTFE) membrane as the mechanical supporting structure and the quaternized polysulfone (QNPSU) loaded with H3PO4 as proton conductor to fabricate the membrane. ▶ The PTFE/QNPSU/H3PO4 membrane conductivity was greater than 0.3 S cm−1 at a relative humidity lower than 0.5% and a temperature of 180 °C with a 400% H3PO4 doping level. ▶ A hydrogen fuel cell using this membrane with oxygen, at 2.0 atmosphere absolute (atma) pressure gave cell voltages >0.4 V at current densities of 1.0 A cm−2.
Journal: Journal of Power Sources - Volume 196, Issue 4, 15 February 2011, Pages 1894–1898