Nafion/PBI Nanofiber Composite Membranes for Fuel Cells Applications

2010 ◽  
Author(s):  
Tzyy-Lung Leon Yu ◽  
Shih-Hao Liu ◽  
Hsiu-Li Lin ◽  
Po-Hao Su
Keyword(s):  
Thin Film ◽  
Fuel Cell ◽  
Composite Membrane ◽  
Fiber Composite ◽  
Composite Membranes ◽  
Cell Performance ◽  
Membrane Electrode ◽  
Membrane Thickness ◽  
Fuel Cell Performance ◽  
Nano Fiber

The PBI (poly(benzimidazole)) nano-fiber thin film with thickness of 18–30 μm is prepared by electro-spinning from a 20 wt% PBI/DMAc (N, N′-dimethyl acetamide) solution. The PBI nano-fiber thin film is then treated with a glutaraldehyde liquid for 24h at room temperature to proceed chemical crosslink reaction. The crosslink PBI nano-fiber thin film is then immersed in Nafion solutions to prepare Nafion/PBI nano-fiber composite membranes (thickness 22–34 μm). The morphology of the composite membranes is observed using a scanning electron microscope (SEM). The mechanical properties, conductivity, and unit fuel cell performance of membrane electrode assembly (MEA) of the composite membrane are investigated and compared with those of Nafion-212 membrane (thickness ∼50 μm) and Nafion/porous PTFE (poly(tetrafluoro ethylene)) composite membrane (thickness ∼22 μm). We show the present composite membrane has a similar fuel cell performance to Nafion/PTFE and a better fuel cell performance than Du Pont Nafion-212.

scholarly journals Unprecedented SPEEK-trimetal Oxide Composites: Physicochemical and Electrochemical Performance in Fuel Cell

2021 ◽  
Author(s):  
Gandhimathi Sivasubramanian ◽  
Senthil Andavan Gurusamy Thangavelu ◽  
Berlina Maria Mahimai ◽  
Krishnan Hariharasubramanian ◽  
PARADESI DEIVANAYAGAM
Keyword(s):  
Fuel Cell ◽  
Electrochemical Performance ◽  
Composite Membrane ◽  
Composite Membranes ◽  
Membrane Electrode Assembly ◽  
Membrane Electrode ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Maximum Water ◽  
Oxide Composites

Abstract Advanced polymer composite membranes were prepared from a linear sulfonated poly(ether ether ketone) (SPEEK) with bismuth cobalt zinc oxide [BCZO, (Bi2O3)0.07(CoO)0.03(ZnO)0.90] nanopowder as an inorganic additive for the application of H2-O2 fuel cell. Morphology data tend to provide evidences for the incorporation of BCZO into SPEEK polymer. Indeed, composite membrane loaded with 7.5 wt.% of BCZO was identified to uptake maximum water, while the pristine SPEEK membrane occurred to retain only 24.0 %. As such SPEEK matrix loaded with 7.5 wt.% of BCZO was found to exhibit the maximum proton conductivity of 0.030 S cm-1, whereas the pristine membrane was restricted to 0.021 S cm-1. Evidently, TGA profile of the composite membrane was measured to exhibit sufficient thermal stability to employ as electrolyte in fuel cell. The membrane electrode assembly of pristine SPEEK and SP-BCZO-7.5 wt.% membranes were fabricated and studied for their electrochemical performance. Indeed, the characteristics of newly developed composite membranes led to possess incredible feature towards fuel cell applications.

scholarly journals Optimization of Membrane Electrode Assembly of PEM Fuel Cell by Response Surface Method

Molecules ◽  
2019 ◽  
Vol 24 (17) ◽  
pp. 3097 ◽  
Author(s):  
Vuppala ◽  
Chedir ◽  
Jiang ◽  
Chen ◽  
Aziz ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Response Surface ◽  
Response Surface Method ◽  
Current Density ◽  
Membrane Electrode Assembly ◽  
Proton Exchange ◽  
Cell Performance ◽  
Membrane Electrode ◽  
Membrane Thickness ◽  
Surface Method

The membrane electrode assembly (MEA) plays an important role in the proton exchange membrane fuel cell (PEMFC) performance. Typically, the structure comprises of a polymer electrolyte membrane sandwiched by agglomerate catalyst layers at the anode and cathode. Optimization of various parameters in the design of MEA is, thus, essential for reducing cost and material usage, while improving cell performance. In this paper, optimization of MEA is performed using a validated two-phase PEMFC numerical model. Key MEA parameters affecting the performance of a single PEMFC are determined from sensitivity analysis and are optimized using the response surface method (RSM). The optimization is carried out at two different operating voltages. The results show that membrane thickness and membrane protonic conductivity coefficient are the most significant parameters influencing cell performance. Notably, at higher voltage (0.8 V per cell), the current density can be improved by up to 40% while, at a lower voltage (0.6 V per cell), the current density may be doubled. The results presented can be of importance for fuel cell engineers to improve the stack performance and expedite the commercialization.

Nafion®/SiO2/m-BOT composite membranes for improved direct methanol fuel cell performance

RSC Advances ◽  
2014 ◽  
Vol 4 (88) ◽  
pp. 47129-47135 ◽  
Author(s):  
Yituo Wang ◽  
Guimei Han ◽  
Zhe Tian ◽  
Meng Wang ◽  
Jianling Li ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Specific Surface ◽  
Direct Methanol Fuel Cell ◽  
Composite Membranes ◽  
Cell Performance ◽  
Fuel Cell Performance ◽  
Direct Methanol ◽  
Methanol Fuel Cell

Bentonite (BOT) has excellent hygroscopicity and large specific surface, so it is chosen as a dopant of Nafion® membranes in this paper.

The effect of water uptake gradient in membrane electrode assembly on fuel cell performance

2011 ◽  
Vol 80 (2) ◽  
pp. 201-206 ◽  
Author(s):  
H. Fujita ◽  
F. Shiraki ◽  
Y. Oshima ◽  
T. Tatsumi ◽  
T. Yoshikawa ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Water Uptake ◽  
Membrane Electrode Assembly ◽  
Cell Performance ◽  
Membrane Electrode ◽  
Fuel Cell Performance ◽  
Effect Of Water

scholarly journals Role of phosphate source in improving the proton conductivity of tin pyrophosphate and its composite electrolytes

2020 ◽  
Vol 8 (32) ◽  
pp. 16345-16354
Author(s):  
Kannan P. Ramaiyan ◽  
Sergio Herrera ◽  
Michael J. Workman ◽  
Troy A. Semelsberger ◽  
Vladimir Atanasov ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Proton Conductivity ◽  
Composite Membranes ◽  
Cell Performance ◽  
Composite Electrolytes ◽  
Fuel Cell Performance ◽  
Phosphate Source ◽  
Phosphorus Precursor

Proper phosphorus precursor selection during synthesis could help produce better tin-pyrophosphate powder and composite membranes with improved fuel cell performance.

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