1-20 of 36
Keyword: diffusion
Close
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
×Close Modal
Sort by
Journal Articles
Article Type: Research Papers
J. Electrochem. En. Conv. Stor. February 2019, 17(1): 011007.
Paper No: JEECS-19-1036
Published Online: September 10, 2019
... about 102.5 mAh/g at a low current rate (C/20), which decreases to 36.75 mAh/g at a relatively higher rate (2C). The capacity retention at C/10 after 50 cycles is 85.7%. The evaluation of Na-ion diffusion coefficients (D Na+ ) in NMO is accomplished by potentiostatic intermittent titration technique...
Journal Articles
Article Type: Review Articles
J. Electrochem. En. Conv. Stor. August 2016, 13(3): 030803.
Paper No: JEECS-16-1079
Published Online: December 12, 2016
... intimate coupling between stresses and electrochemical processes, including diffusion-induced stresses, stress-regulated surface charge transfer, interfacial reactions, inhomogeneous growth of lithiated phases, instability of solid-state reaction front (SSRF), as well as lithiation-modulated plasticity and...
Journal Articles
Article Type: Research-Article
J. Electrochem. En. Conv. Stor. February 2014, 11(1): 011001.
Paper No: FC-11-1086
Published Online: October 17, 2013
..., 2013; published online October 17, 2013. Assoc. Editor: Abel Hernandez. 28 06 2011 05 09 2013 In fuel cell systems with an anode recirculation cycle that runs overstoichiometrically, an undesired enrichment of nitrogen and water vapor occurs due to their diffusion through the...
Journal Articles
Article Type: Research Papers
J. Electrochem. En. Conv. Stor. February 2012, 9(1): 011016.
Published Online: December 27, 2011
..., electrochemistry, electrical conduction, and diffusion physics. This model was built using the actual button cell testing geometry and using experimental data for validation purposes. The objective of this study is to understand the effects of the testing setup used on the cell performance and to recommend an...
Journal Articles
Article Type: Research Papers
J. Electrochem. En. Conv. Stor. October 2011, 8(5): 051021.
Published Online: July 12, 2011
...Henning Severson; Mohsen Assadi In this paper results from a parameter study of an anode-supported solid oxide fuel cell (SOFC) are presented. The effects on performance, current-voltage (I-V) characteristics, polarization voltages, and diffusion coefficients are modeled for different temperatures...
Journal Articles
Article Type: Research Papers
J. Electrochem. En. Conv. Stor. October 2011, 8(5): 051008.
Published Online: June 17, 2011
... multifunctional efficiencies ranging from 22% to 69%. The higher efficiency was obtained by optimizing the contact pressure at the gas diffusion layer (GDL) in a model cell design. The efficiencies obtained suggest the need for improved multifunctional designs in order to reach system level mass savings. 04...
Journal Articles
Article Type: Research Papers
J. Electrochem. En. Conv. Stor. February 2011, 8(1): 011003.
Published Online: November 1, 2010
...Terry B. Caston; Kanthi L. Bhamidipati; Haley Carney; Tequila A. L. Harris The goal of this study is to design a gas diffusion layer (GDL) for a polymer electrolyte membrane (PEM) fuel cell with a graduated permeability and thereby graduating the resistance to flow throughout the GDL. It has been...
Journal Articles
Article Type: Research Papers
J. Electrochem. En. Conv. Stor. August 2010, 7(4): 041002.
Published Online: April 5, 2010
...Utku Gulan; Hasmet Turkoglu; Irfan Ar In this study, the fluid flow and cell performance in cathode side of a proton exchange membrane (PEM) fuel cell were numerically analyzed. The problem domain consists of cathode gas channel, cathode gas diffusion layer, and cathode catalyst layer. The...
Journal Articles
Article Type: Research Papers
J. Electrochem. En. Conv. Stor. June 2010, 7(3): 031021.
Published Online: March 17, 2010
...-dependent phenomena. Evaporation and capillarity were assumed to be the predominant mechanisms of water flow through the gas diffusion media. The innovative features of the model are not only to simulate the water transport inside the porous media with relative simplicity, but also to simulate the water...
Journal Articles
Article Type: Research Papers
J. Electrochem. En. Conv. Stor. June 2010, 7(3): 031015.
Published Online: March 16, 2010
... to simulate fluid flow at pore scale in porous materials. This work provides a description of how the two techniques have been adapted to simulate gas movement through a carbon paper gas diffusion layer (GDL). The validation work demonstrates that the difference between the simulated and measured...
Journal Articles
Article Type: Research Papers
J. Electrochem. En. Conv. Stor. April 2010, 7(2): 021022.
Published Online: January 25, 2010
... diffusion oxygen reduction reaction Solid oxide fuel cells (SOFCs) are high temperature fuel cells that are composed of solid (ceramic and metal) materials and use oxygen ions ( O 2 − ) as the electrolytic ion. Electrolyte material is first determined by considering the...
Journal Articles
Article Type: Research Papers
J. Electrochem. En. Conv. Stor. April 2010, 7(2): 021012.
Published Online: January 11, 2010
...Zhongying Shi; Xia Wang; Laila Guessous The gas diffusion layer (GDL) plays an important role in maintaining suitable water management in a proton exchange membrane fuel cell. The properties of the gas diffusion layer, such as its porosity, permeability, wettability, and thickness, are affected by...
Journal Articles
Article Type: Research Papers
J. Electrochem. En. Conv. Stor. April 2010, 7(2): 021009.
Published Online: January 6, 2010
... by adjusting the liquid water saturation at the interface of the cathode gas diffusion layer and flow channels. 03 03 2008 31 10 2008 06 01 2010 06 01 2010 channel flow diffusion electrochemical electrodes numerical analysis proton exchange membrane fuel cells...
Journal Articles
Article Type: Research Papers
J. Electrochem. En. Conv. Stor. February 2010, 7(1): 011006.
Published Online: October 6, 2009
...Abhijit S. Joshi; Kyle N. Grew; John R. Izzo, Jr.; Aldo A. Peracchio; Wilson K. S. Chiu The lattice Boltzmann method (LBM) was used to study the three-dimensional (3D) mass diffusion of three species ( H 2 , H 2 O , and N 2 ) in the pore phase of a porous solid oxide fuel cell (SOFC) anode. The...
Journal Articles
Article Type: Research Papers
J. Electrochem. En. Conv. Stor. November 2009, 6(4): 041010.
Published Online: August 14, 2009
...J. D. Sole; M. W. Ellis; D. A. Dillard A promising type of proton exchange membrane fuel cell (PEMFC) architecture, the ribbon fuel cell, relies on the gas diffusion layer (GDL) to conduct electrical current in-plane to adjacent cells or collector terminals. The potential advantages of the fuel...
Journal Articles
Article Type: Research Papers
J. Electrochem. En. Conv. Stor. August 2009, 6(3): 031016.
Published Online: June 8, 2009
... relative humidity sensors embedded in the anode and cathode flow field plates. The effects of the relative humidity and stoichiometry of the cathode inlet on relative humidity distribution in the channels and on water accumulation in the gas diffusion layers (GDLs) were investigated in this study. The...
Journal Articles
Article Type: Research Papers
J. Electrochem. En. Conv. Stor. February 2009, 6(1): 011019.
Published Online: November 18, 2008
..., energy balance, and diffusion in the gas diffusion layer, reflecting a two-phase phenomenon of water. Major design parameters and an operating condition by conveying simulations have been changed to analyze sensitivity of the parameters on the performance, which is then compared with experimental results...
Journal Articles
Article Type: Research Papers
J. Electrochem. En. Conv. Stor. February 2009, 6(1): 011006.
Published Online: November 4, 2008
...Ming-San Lee; Long-Jeng Chen; Ting-Huai Chen A new hydrophobic micropillared structure for the electrode of a proton exchange membrane fuel cell (PEMFC) is proposed in this study. Its performance has a 40% increase over the conventional structured electrode. The new design changes the gas-diffusion...
Journal Articles
Article Type: Research Papers
J. Electrochem. En. Conv. Stor. November 2008, 5(4): 041011.
Published Online: September 11, 2008
...Kui Jiao; Biao Zhou Liquid water transport inside proton exchange membrane (PEM) fuel cells is one of the key challenges for water management in a PEM fuel cell. Investigation of the air-water flow patterns inside fuel cell gas flow channels with gas diffusion layer (GDL) would provide valuable...
Journal Articles
Article Type: Research Papers
J. Electrochem. En. Conv. Stor. May 2008, 5(2): 021014.
Published Online: April 21, 2008
... overvoltage is calculated by means of both binary and Knudsen diffusion coefficients. On the basis of this model, a case study is presented and discussed, in which temperatures, pressures, chemical compositions, and electrical parameters are evaluated for each slice of the SOFC tube under investigation...