The Effect of the Reference Electrode Position on the Measurement of Half Cell Polarization in Proton-Exchange Membrane Fuel Cells

2012 ◽  
Vol 159 (7) ◽  
pp. F181-F186 ◽  
Author(s):  
Jan Hendrik Ohs ◽  
Ulrich Sauter ◽  
Sebatian Maass ◽  
Detlef Stolten
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Reference Electrode ◽  
Cell Polarization ◽  
Proton Exchange ◽  
Electrode Position ◽  
Half Cell ◽  
Exchange Membrane ◽  
Reference Electrode Position

scholarly journals On the Existence of a Weak Solution of a Half-Cell Model for PEM Fuel Cells

2010 ◽  
Vol 2010 ◽  
pp. 1-16 ◽  
Author(s):  
Shuh-Jye Chern ◽  
Po-Chun Huang
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Cell Model ◽  
Catalyst Layer ◽  
Pem Fuel Cells ◽  
Proton Exchange ◽  
Half Cell ◽  
Existence Of A Solution ◽  
Cathode Catalyst Layer ◽  
Exchange Membrane

A nonlinear boundary value problem (BVP) from the modelling of the transport phenomena in the cathode catalyst layer of a one-dimensional half-cell single-phase model for proton exchange membrane (PEM) fuel cells, derived from the 3D model of Zhou and Liu (2000, 2001), is studied. It is a BVP for a system of three coupled ordinary differential equations of second order. Schauder's fixed point theorem is applied to show the existence of a solution in the Sobolev space .

Carbon Nanotube Free-Standing Film of Pt/MWNTs as a Bifunctional Component in Hydrogen Proton Exchange Membrane Fuel Cells

2007 ◽  
Vol 1018 ◽  
Author(s):  
Jason M. Tang ◽  
Kurt Jensen ◽  
Paul Larsen ◽  
Wenzhen Li ◽  
Mikhail E. Itkis ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Catalyst Layer ◽  
Cell Polarization ◽  
Proton Exchange ◽  
Peak Performance ◽  
Membrane Electrode ◽  
Free Standing ◽  
Exchange Membrane

AbstractConventional fuel cell architecture on one side of the membrane electrode assembly consists of a carbon backing layer, hydrophobic microporous layer (MPL), and a catalyst layer, which is in contact with the solid proton exchange membrane. Pt nanoparticles are deposited onto multi-walled carbon nanotubes (Pt/MWNTs) and a free-standing film of Pt/MWNTs is fabricated to act as the MPL and the catalyst layer in hydrogen fuel cells. The free-standing film of Pt/MWNTs condenses two functions into one bifunctional layer that simplifies the fuel cell fabrication procedure. Fuel cell polarization performance improves when using the free-standing film of Pt/MWNTs without the MPL resulting in a higher peak performance of 1.2 W/cm2 in comparison with 1.0 W/cm2 when in the presence of a MPL.

Investigation on Catalyst Layers’ Structure Parameters on the Performance of High-Temperature Proton Exchange Membrane Fuel Cells

2015 ◽  
Vol 1092-1093 ◽  
pp. 196-199
Author(s):  
Shu Guo Qu ◽  
Jian Long Li
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Proton Exchange Membrane ◽  
Cell Polarization ◽  
Proton Exchange ◽  
Electrochemical Kinetics ◽  
Experimental Result ◽  
Structure Parameters ◽  
Charge Balance ◽  
Exchange Membrane

A two-dimensional steady state numerical model for high temperature polymer exchange membrane fuel cells based on Nafion212/SiO2composite membrane was developed. Finite element method was used to solve electrochemical kinetics coupled with flow, multi-component transport, charge balance and energy conservation. The model-predicted fuel cell polarization curve was compared with the published experimental result and a good agreement was found. The effects of the structure parameters of the catalyst layer including Pt/Carbon ratio and Pt loading on the performance of high temperature polymer exchange membrane fuel cells were evaluated.

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>

Latest Trends and Challenges In Proton Exchange Membrane Fuel Cell (PEMFC)

2017 ◽  
Vol 10 (1) ◽  
pp. 96-105 ◽  
Author(s):  
Mohammed Jourdani ◽  
Hamid Mounir ◽  
Abdellatif El Marjani
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Total Cost ◽  
Cell Efficiency ◽  
Technical Advances ◽  
Exchange Membrane

Background: During last few years, the proton exchange membrane fuel cells (PEMFCs) underwent a huge development. Method: The different contributions to the design, the material of all components and the efficiencies are analyzed. Result: Many technical advances are introduced to increase the PEMFC fuel cell efficiency and lifetime for transportation, stationary and portable utilization. Conclusion: By the last years, the total cost of this system is decreasing. However, the remaining challenges that need to be overcome mean that it will be several years before full commercialization can take place.This paper gives an overview of the recent advancements in the development of Proton Exchange Membrane Fuel cells and remaining challenges of PEMFC.

scholarly journals ZIF-derived Co–N–C ORR catalyst with high performance in proton exchange membrane fuel cells

2020 ◽  
Vol 30 (6) ◽  
pp. 855-860
Author(s):  
Ruixiang Wang ◽  
Pengyang Zhang ◽  
Yucheng Wang ◽  
Yuesheng Wang ◽  
Karim Zaghib ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Performance ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Exchange Membrane
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