Design of sepiolite-supported ionogel-embedded composite membranes without proton carrier wastage for wide-temperature-range operation of proton exchange membrane fuel cells

2019 ◽  
Vol 7 (25) ◽  
pp. 15288-15301 ◽  
Author(s):  
Xiaoxiao Zhang ◽  
Xudong Fu ◽  
Shoukun Yang ◽  
Yuanfang Zhang ◽  
Rong Zhang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Wide Temperature Range ◽  
Proton Exchange Membrane ◽  
Composite Membranes ◽  
Proton Exchange ◽  
Temperature Range ◽  
Exchange Membrane

An ionogel incorporated into poly(2,5-benzimidazole) membranes was designed for the applications of PEMFCs in a wide temperature range.

From –20 to 200 °C: Fuel Cells with Broad Operational Flexibility Enabled by Intrinsically Ultramicroporous Membranes

2021 ◽  
Author(s):  
Hongying Tang ◽  
Kang Geng ◽  
Lei Wu ◽  
Junjie Liu ◽  
Zhiquan Chen ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Operational Flexibility ◽  
Full Spectrum ◽  
Innovative Design ◽  
Temperature Range ◽  
Temperature Conditions ◽  
Start Up ◽  
Exchange Membrane

Abstract Conventional proton exchange membrane fuel cells (PEMFCs) operate at a narrow temperature range, either under low temperature conditions (80‒90°C) using fully-humidified perfluorosulfonic acid (Nafion®) membranes or under non-humidified high temperature conditions (140‒180°C) using phosphoric acid (PA)-doped membranes to avoid water condensation-induced PA leaching. To allow wide operational flexibility over the full spectrum of temperature and humidity ranges, we present an innovative design strategy by using PA-doped intrinsically ultramicroporous membranes constructed from rigid and contorted high free volume polymers. The membranes with an average ultramicropore radius of 3.3 Å showed a significant siphoning effect as confirmed by the delocalization of PA in 31P NMR, thus allowing high retention of PA even under highly humidified conditions and presenting more than three orders of magnitude higher proton conductivity retention than conventional dense PA-doped polybenzimidazole membranes (PBI/PA). The resulting PEMFCs display impressive performance over a much broader temperature range from − 20 to 200°C and can accomplish over 100 start-up/shut-down cycles even at − 20°C. The broad operational flexibility rendered from the high PA-retention can ultimately simplify heat and water management and thereby reduce PEMFC costs.

scholarly journals Protic plastic crystal/PVDF composite membranes for Proton Exchange Membrane Fuel Cells under non-humidified conditions

2017 ◽  
Vol 247 ◽  
pp. 970-976 ◽  
Author(s):  
M. Díaz ◽  
A. Ortiz ◽  
J.M. Pringle ◽  
X. Wang ◽  
R. Vijayaraghavan ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Composite Membranes ◽  
Proton Exchange ◽  
Plastic Crystal ◽  
Exchange Membrane

UiO-66 derivatives and their composite membranes for effective proton conduction

2020 ◽  
Vol 49 (47) ◽  
pp. 17130-17139
Author(s):  
Lu Feng ◽  
Hao-Bo Hou ◽  
Hong Zhou
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Metal Organic Frameworks ◽  
Composite Membranes ◽  
Proton Conduction ◽  
Proton Exchange ◽  
Proton Conducting ◽  
Conducting Materials ◽  
Metal Organic ◽  
Exchange Membrane

As newly emerging proton-conducting materials, metal–organic frameworks (MOFs) have been attracting wide attention in the field of proton exchange membrane fuel cells.

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