Results 181 to 190 of about 11,572 (205)

Comparison of Methanol Crossover among Four Types of Nafion Membranes

Journal of The Electrochemical Society, 2004
The crossover behavior of methanol through Nafion 112, 117, 1035, and 1135 membranes using cyclic voltammetry (CV) was studied at 25°C and the results compared. The multiple CV technique was used to study the electrochemical characteristics of the crossed methanol during this crossover.
J. Ling, O. Savadogo
openaire   +1 more source

Methanol Crossover Effect for Direct Methanol Fuel Cells: Applicability of Methanol Activity in Polymer Electrolyte Membrane

Journal of The Electrochemical Society, 2008
We developed a cell voltage model as a function of the current density response of the direct methanol fuel cell (DMFC). The impact on cell performance by methanol crossover, which lowers the cell performance, is discussed. We employ a srmethanol activity term to take into account the methanol crossover effect.
Jung Ho Yang, Young Chan Bae
openaire   +1 more source

Methanol Crossover through Modified Nafion Proton Exchange Membrane

Russian Journal of Electrochemistry, 2004
The proton exchange membrane direct methanol fuel cells (PEMDMFC) show considerably lower performance than the hydrogen fuel cell because of inefficient methanol oxidation and the crossover of methanol through the membrane that separates the anode from the cathode.
F. Kadirgan, O. Savadogo
openaire   +2 more sources

An Electroanalytical Study of Methanol Crossover Through Nafion 117 Membrane

2nd International Conference on Fuel Cell Science, Engineering and Technology, 2004
The proton exchange membrane direct methanol fuel cells (PEMDMFC) shows considerably lower performance than the hydrogen fuel cell because of inefficient methanol oxidation and the crossover of the methanol through the membrane that separates the anode from the cathode.
F. Kadirgan, O. Savadogo
openaire   +1 more source

Methanol crossover through PtRu/Nafion composite membrane for a direct methanol fuel cell

International Journal of Hydrogen Energy, 2007
Abstract This study examined methanol crossover through PtRu/Nafion composite membranes for the direct methanol fuel cell. For this purpose, 0.03, 0.05 and 0.10 wt% PtRu/Nafion composite membranes were fabricated using a solution impregnation method.
E JUNG, U JUNG, T YANG, D PEAK, D JUNG, S KIM   +5 more
openaire   +1 more source

Low Crossover of Methanol and Water Through Thin Membranes in Direct Methanol Fuel Cells

Journal of The Electrochemical Society, 2006
Low crossover of both methanol and water through a polymer membrane in a direct methanol fuel cell (DMFC) is essential for using high concentration methanol in portable power applications. A novel design of the membrane-electrolyte assembly (MEA) has been developed in this work to attain low methanol crossover, low water crossover, and high cell ...
Fuqiang Liu, Guoqiang Lu, Chao-Yang Wang
openaire   +1 more source

Water and methanol crossover in direct methanol fuel cells—Effect of anode diffusion media

Electrochimica Acta, 2008
Abstract Various anode diffusion media have been experimentally studied to reduce water crossover in a direct methanol fuel cell (DMFC). A two-phase water transport model was also employed to theoretically study their effects on water transport and saturation level in a DMFC anode. It is found that wettability of the anode microporous layer (MPL) has
Fuqiang Liu, Chao-Yang Wang
openaire   +1 more source

An algebraic model on the performance of a direct methanol fuel cell with consideration of methanol crossover

Journal of Power Sources, 2007
Abstract An algebraic one-dimensional model on the membrane-electrode-assembly (MEA) of direct methanol fuel cell (DMFC) is proposed. Non-linear regression procedure was imposed on the model to retrieve important parameters: solid polymer electrolyte conductivity κ m , exchange current density of methanol electro-oxidation at anode catalyst surface
openaire   +1 more source

Methanol and Water Crossover in a Passive Direct Methanol Fuel Cell: Mathematical Model

2016
Methanol crossover and water crossover within the polymer electrolyte membrane of a passive direct methanol fuel cell (DMFC) has been analyzed in the present study. A non-isothermal mathematical model has been developed. The model incorporates methanol, water and oxygen transport phenomena along with electrochemical reactions occurring in the DMFC. The
Naveen Shrivastava, Rajkumar Chadge, Sanjeev Bankar, Anil Bamnote   +3 more
openaire   +1 more source

An Electrochemical Investigation of Methanol Crossover in DMFCs

Journal of Electrochemistry, 2006
Meng-di YOU, Xuan CHENG, Lian LIU, Lu ZHANG   +3 more
openaire   +1 more source