High CO tolerance of new SiO2 doped phosphoric acid/polybenzimidazole polymer electrolyte membrane fuel cells at high temperatures of 200–250 °C

Yi Cheng, Jin Zhang, Shanfu Lu*, Haohua Kuang, John Bradley, Roland De Marco, David Aili, Qingfeng Li, Cheng Qiang Cui, San Ping Jiang

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

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.
Original languageEnglish
JournalInternational Journal of Hydrogen Energy
Volume43
Issue number49
Pages (from-to)22487-22499
ISSN0360-3199
DOIs
Publication statusPublished - 2018

Keywords

  • Polymer electrolyte membrane fuel cell
  • New SiO2 doped PA/PBI composite membrane
  • High temperature
  • CO tolerance
  • PA/Phosphosilicate nanoclusters

Cite this

Cheng, Yi ; Zhang, Jin ; Lu, Shanfu ; Kuang, Haohua ; Bradley, John ; De Marco, Roland ; Aili, David ; Li, Qingfeng ; Cui, Cheng Qiang ; Jiang, San Ping. / High CO tolerance of new SiO2 doped phosphoric acid/polybenzimidazole polymer electrolyte membrane fuel cells at high temperatures of 200–250 °C. In: International Journal of Hydrogen Energy. 2018 ; Vol. 43, No. 49. pp. 22487-22499.
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title = "High CO tolerance of new SiO2 doped phosphoric acid/polybenzimidazole polymer electrolyte membrane fuel cells at high temperatures of 200–250 °C",
abstract = "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.",
keywords = "Polymer electrolyte membrane fuel cell, New SiO2 doped PA/PBI composite membrane, High temperature, CO tolerance, PA/Phosphosilicate nanoclusters",
author = "Yi Cheng and Jin Zhang and Shanfu Lu and Haohua Kuang and John Bradley and {De Marco}, Roland and David Aili and Qingfeng Li and Cui, {Cheng Qiang} and Jiang, {San Ping}",
year = "2018",
doi = "10.1016/j.ijhydene.2018.10.036",
language = "English",
volume = "43",
pages = "22487--22499",
journal = "International Journal of Hydrogen Energy",
issn = "0360-3199",
publisher = "Elsevier",
number = "49",

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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 journalJournal articleResearchpeer-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 -