scholarly journals In situ synthesis of star copolymers consisting of a polyhedral oligomeric silsesquioxane core and poly(2,5‐benzimidazole) arms for high‐temperature proton exchange membrane fuel cells

2020 ◽  
Vol 44 (11) ◽  
pp. 8769-8780 ◽  
Author(s):  
Tao Li ◽  
Fang Luo ◽  
Xudong Fu ◽  
Lanxin Li ◽  
Jiayuan Min ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Proton Exchange Membrane ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
In Situ Synthesis ◽  
Proton Exchange ◽  
Star Copolymers ◽  
Oligomeric Silsesquioxane ◽  
Exchange Membrane

scholarly journals Polybenzimidazole and Phosphonic Acid Groups-Functionalized Polyhedral Oligomeric Silsesquioxane Composite Electrolyte for High Temperature Proton Exchange Membrane

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Sung-Kon Kim
Keyword(s):  
High Temperature ◽  
Composite Membrane ◽  
Phosphonic Acid ◽  
Proton Exchange Membrane ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Proton Exchange ◽  
High Yield ◽  
Phosphonic Acid Groups ◽  
Oligomeric Silsesquioxane ◽  
Exchange Membrane

Here, we report composite membrane consisting of poly[2,2′-(m-phenylene)-5,5′-(bibenzimidazole)] (PBI) and polyhedral oligomeric silsesquioxane functionalized with phosphonic acid groups (PO(OH)2-POSS) for high temperature proton exchange membrane. ~7 phosphonic acid groups are incorporated into the phenyl rings of POSS via bromination in a high yield (~93%), followed by substitution of the bromine elements by phosphonate ester groupsviaa Pd(0) catalyzed P–C coupling reaction. Phosphonic acid groups are formed by the hydrolysis of the phosphonate ester groups in hydrobromic acid solution. At a 50 wt% of PA content in the membranes, PBI/PO(OH)2-POSS composite membrane shows larger proton conductivity of 3.2 × 10−3 S cm−1than 2.8 × 10−3 S cm−1of PBI membrane at 150°C and anhydrous conditions, owing to the multiple phosphonic acid groups of PO(OH)2-POSS that can function as proton transport medium at high temperature and low humidity conditions.

Submicro-pore containing poly(ether sulfones)/polyvinylpyrrolidone membranes for high-temperature fuel cell applications

2015 ◽  
Vol 3 (16) ◽  
pp. 8847-8854 ◽  
Author(s):  
Zhibin Guo ◽  
Ruijie Xiu ◽  
Shanfu Lu ◽  
Xin Xu ◽  
Shichun Yang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Exchange Membrane

A novel submicro-pore containing proton exchange membrane is designed and fabricated for application in high-temperature fuel cells.

A high performance polybenzimidazole–CNT hybrid electrode for high-temperature proton exchange membrane fuel cells

2014 ◽  
Vol 2 (19) ◽  
pp. 7015-7019 ◽  
Author(s):  
He-Yun Du ◽  
Chen-Hao Wang ◽  
Chen-Shuan Yang ◽  
Hsin-Cheng Hsu ◽  
Sun-Tang Chang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
High Performance ◽  
Proton Exchange Membrane ◽  
Electrochemical Activity ◽  
Proton Exchange ◽  
Exchange Membrane

A well-controlled Pt/PBI–CNT electrode provides not only good interfacial continuity but also numerous edge planes, which has strong electrochemical activity in HT-PEMFCs.

Novel Proton Exchange Membrane for High Temperature Fuel Cells

1997 ◽  
Vol 496 ◽  
Author(s):  
M. Bhamidipati ◽  
E. Lazaro ◽  
F. Lyons ◽  
R. S. Morris
Keyword(s):  
Thermal Stability ◽  
Fuel Cells ◽  
High Temperature ◽  
Electrochemical Performance ◽  
Proton Exchange Membrane ◽  
Research Effort ◽  
Analysis Data ◽  
Proton Exchange ◽  
Temperature Conductivity ◽  
Exchange Membrane

ABSTRACTThis research effort sought to demonstrate that combining select phosphonic acid additives with Nafion could improve Nafion's high temperature electrochemical performance. A 1:1 mixture of the additive with Nafion, resulted in a film that demonstrated 30% higher conductivity than a phosphoric acid equilibrated Nafion control at 175°C. This improvement to the high temperature conductivity of the proton exchange membrane Nafion is without precedent. In addition, thermal analysis data of the test films suggested that the additives did not compromise the thermal stability of Nafion. The results suggest that the improved Nafion proton exchange membranes could offer superior electrochemical performance, but would retain the same degree of thermal stability as Nafion. This research could eventually lead to portable fuel cells that could oxidize unrefined hydrocarbon fuels, resulting in wider proliferation of fuel cells for portable power.

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