Abstract
| Original language | English |
|---|---|
| Journal | International Journal of Hydrogen Energy |
| Volume | 43 |
| Issue number | 49 |
| Pages (from-to) | 22487-22499 |
| ISSN | 0360-3199 |
| DOIs | |
| Publication status | Published - 2018 |
Keywords
- Polymer electrolyte membrane fuel cell
- New SiO2 doped PA/PBI composite membrane
- High temperature
- CO tolerance
- PA/Phosphosilicate nanoclusters
Cite this
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High CO tolerance of new SiO2 doped phosphoric acid/polybenzimidazole polymer electrolyte membrane fuel cells at high temperatures of 200–250 °C. / Cheng, Yi; Zhang, Jin; Lu, Shanfu; Kuang, Haohua; Bradley, John; De Marco, Roland; Aili, David; Li, Qingfeng; Cui, Cheng Qiang; Jiang, San Ping.
In: International Journal of Hydrogen Energy, Vol. 43, No. 49, 2018, p. 22487-22499.Research output: Contribution to journal › Journal article › Research › peer-review
TY - JOUR
T1 - High CO tolerance of new SiO2 doped phosphoric acid/polybenzimidazole polymer electrolyte membrane fuel cells at high temperatures of 200–250 °C
AU - Cheng, Yi
AU - Zhang, Jin
AU - Lu, Shanfu
AU - Kuang, Haohua
AU - Bradley, John
AU - De Marco, Roland
AU - Aili, David
AU - Li, Qingfeng
AU - Cui, Cheng Qiang
AU - Jiang, San Ping
PY - 2018
Y1 - 2018
N2 - The high CO tolerance or resistance is critical for the practical application of proton exchange membrane fuel cells (PEMFCs) coupled with on board reformers for transportation applications due to the presence of high level of CO in the reformats. Increasing the operating temperature is most effective to enhance the CO tolerance of PEMFCs and therefore is of high technological significance. Here, we report a new PEMFC based on SiO2 nanoparticles doped phosphoric acid/polybenzimidazole (PA/PBI/SiO2) composite membranes for operation at temperatures higher than 200 °C. The phosphoric acid within the polymer matrix is stabilized by PA/phosphosilicate nanoclusters formed via prior polarization treatment of the membrane cells at 250 °C at a cell voltage of 0.6 V for 24 h, achieving a high proton conductivity and excellent stability at temperatures beyond that of conventional PA/PBI membranes. The proton conductivity of PA/PBI/SiO2 composite membranes is in the range of 0.029-0.041 S cm-1 and is stable at 250 °C. The PA/PBI/SiO2 composite membrane cell displays an exceptional CO tolerance with a negligible loss in performance at CO contents as high as 11.7% at 240 °C. The cell delivers a peak power density of 283 mW cm-2 and is stable at 240 °C for 100 h under a cell voltage of 0.6 V in 6.3% CO-contained H2 fuel under anhydrous conditions.
AB - The high CO tolerance or resistance is critical for the practical application of proton exchange membrane fuel cells (PEMFCs) coupled with on board reformers for transportation applications due to the presence of high level of CO in the reformats. Increasing the operating temperature is most effective to enhance the CO tolerance of PEMFCs and therefore is of high technological significance. Here, we report a new PEMFC based on SiO2 nanoparticles doped phosphoric acid/polybenzimidazole (PA/PBI/SiO2) composite membranes for operation at temperatures higher than 200 °C. The phosphoric acid within the polymer matrix is stabilized by PA/phosphosilicate nanoclusters formed via prior polarization treatment of the membrane cells at 250 °C at a cell voltage of 0.6 V for 24 h, achieving a high proton conductivity and excellent stability at temperatures beyond that of conventional PA/PBI membranes. The proton conductivity of PA/PBI/SiO2 composite membranes is in the range of 0.029-0.041 S cm-1 and is stable at 250 °C. The PA/PBI/SiO2 composite membrane cell displays an exceptional CO tolerance with a negligible loss in performance at CO contents as high as 11.7% at 240 °C. The cell delivers a peak power density of 283 mW cm-2 and is stable at 240 °C for 100 h under a cell voltage of 0.6 V in 6.3% CO-contained H2 fuel under anhydrous conditions.
KW - Polymer electrolyte membrane fuel cell
KW - New SiO2 doped PA/PBI composite membrane
KW - High temperature
KW - CO tolerance
KW - PA/Phosphosilicate nanoclusters
U2 - 10.1016/j.ijhydene.2018.10.036
DO - 10.1016/j.ijhydene.2018.10.036
M3 - Journal article
VL - 43
SP - 22487
EP - 22499
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 49
ER -