Electrocatalyst Design for an Elevated Temperature Proton Exchange Membrane Direct Ethanol Fuel Cell

2019 ◽  
Vol 16 (2) ◽  
pp. 1285-1291
Author(s):  
Andrew B. Bocarsly ◽  
Ellazar Niangar
Keyword(s):  
Fuel Cell ◽  
Elevated Temperature ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Ethanol Fuel ◽  
Direct Ethanol Fuel Cell ◽  
Exchange Membrane

scholarly journals Influence of Solvents on the Electroactivity of PtAl/rGO Catalyst Inks and Anode in Direct Ethanol Fuel Cell

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Thu Ha Thi Vu ◽  
Minh Dang Nguyen ◽  
Anh Tuan Ngoc Mai
Keyword(s):  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Volume Ratio ◽  
Proton Exchange ◽  
Alkaline Media ◽  
Carbon Cloth ◽  
Ethanol Fuel ◽  
Direct Ethanol Fuel Cell ◽  
Acidic And Alkaline Media ◽  
Exchange Membrane

This paper presents research on the effects of common solvents such as n-butyl acetate, isopropanol, and ethanol on the properties and electroactivity of catalyst ink based on PtAl/rGO. The inks prepared by mixing PtAl/rGO catalyst, Nafion solution (5 wt%), and solvent were coated on carbon cloth by the spin coating method. The results obtained showed that ethanol was the most suitable solvent for the preparation of catalyst ink with a volume ratio between catalyst slurry and solvent of 1 : 1 (CI-EtOH (1/1) ink). The surface of the CI-EtOH (1/1) coated electrode was smooth, flat, and even and had no cracks due to the increase of Nafion mobility, resulting in significant improvement in the interaction between Pt particles and ionomer. Moreover, the electrochemical activity of the CI-EtOH (1/1) ink in ethanol electrooxidation reaction, in both acidic and alkaline media, has the highest value, with the forward current density, IF, reaching 1793 mA mgPt−1 and 4751 mA mgPt−1, respectively. In the application in direct ethanol fuel cell (DEFC), the CI-EtOH ink-coated anode also exhibited the highest power density in both PEM-DEFC (with a proton exchange membrane) and AEM-DEFC (with an anion exchange membrane) at 19.10 mW cm−2 and 27.07 mW cm−2, respectively.

Physically stable proton exchange membrane with ordered electrolyte for elevated temperature PEM fuel cell

2012 ◽  
Vol 37 (12) ◽  
pp. 9782-9791 ◽  
Author(s):  
Wei Guo ◽  
Haolin Tang ◽  
Meiling Sun ◽  
Huan Yang ◽  
Mu Pan ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Elevated Temperature ◽  
Proton Exchange Membrane ◽  
Pem Fuel Cell ◽  
Proton Exchange ◽  
Exchange Membrane

Highly proton conductive membranes based on carboxylated cellulose nanofibres and their performance in proton exchange membrane fuel cells

2019 ◽  
Author(s):  
Valentina Guccini ◽  
Annika Carlson ◽  
Shun Yu ◽  
Göran Lindbergh ◽  
Rakel Wreland Lindström ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Surface Charge ◽  
Proton Exchange Membrane ◽  
Membrane Surface ◽  
Proton Exchange ◽  
Membrane Thickness ◽  
Fuel Cell Performance ◽  
Cellulose Nanofibres ◽  
Exchange Membrane

The performance of thin carboxylated cellulose nanofiber-based (CNF) membranes as proton exchange membranes in fuel cells has been measured in-situ as a function of CNF surface charge density (600 and 1550 µmol g<sup>-1</sup>), counterion (H<sup>+</sup>or Na<sup>+</sup>), membrane thickness and fuel cell relative humidity (RH 55 to 95 %). The structural evolution of the membranes as a function of RH as measured by Small Angle X-ray scattering shows that water channels are formed only above 75 % RH. The amount of absorbed water was shown to depend on the membrane surface charge and counter ions (Na<sup>+</sup>or H<sup>+</sup>). The high affinity of CNF for water and the high aspect ratio of the nanofibers, together with a well-defined and homogenous membrane structure, ensures a proton conductivity exceeding 1 mS cm<sup>-1</sup>at 30 °C between 65 and 95 % RH. This is two orders of magnitude larger than previously reported values for cellulose materials and only one order of magnitude lower than Nafion 212. Moreover, the CNF membranes are characterized by a lower hydrogen crossover than Nafion, despite being ≈ 30 % thinner. Thanks to their environmental compatibility and promising fuel cell performance the CNF membranes should be considered for new generation proton exchange membrane fuel cells.<br>

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