Results 211 to 220 of about 33,730 (224)
Some of the next articles are maybe not open access.
Water and methanol crossover in direct methanol fuel cells—Effect of anode diffusion media
Electrochimica Acta, 2008Abstract 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
Energy & Fuels, 2010
A new method to reduce methanol crossover in fuel cells is presented. This approach relies on coating an anode gas diffusion layer with poly(3,4-ethylenedioxythiophene), which is achieved by an electropolymerization method. Methanol permeability through commercially available gas diffusion layers was reduced from 4.5 × 10−5 to as low as 1.8 × 10−6 cm2 ...
Ronald J. Stanis +2 more
openaire +1 more source
A new method to reduce methanol crossover in fuel cells is presented. This approach relies on coating an anode gas diffusion layer with poly(3,4-ethylenedioxythiophene), which is achieved by an electropolymerization method. Methanol permeability through commercially available gas diffusion layers was reduced from 4.5 × 10−5 to as low as 1.8 × 10−6 cm2 ...
Ronald J. Stanis +2 more
openaire +1 more source
Real time measurements of methanol crossover in a DMFC
Journal of Power Sources, 2007Methanol crossover is a serious problem in a direct methanol fuel cell (DMFC), which causes significant voltage loss and waste of fuel. Due to methanol crossover, most DMFCs must operate on a fuel with a very low methanol concentration; yet very low methanol concentration also causes a poor cell performance.
Jiahua Han, Hongtan Liu
openaire +1 more source
Methanol Crossover Effects on Cathode Potential and Performance of a Direct Methanol Fuel Cell
ECS Meeting Abstracts, 2006Abstract not Available.
Wolf Velstich +2 more
openaire +1 more source
Methanol crossover in direct methanol fuel cells: a link between power and energy density
Journal of Power Sources, 2002Abstract Direct methanol fuel cell performance curves were obtained as a function of three parameters, (1) temperature, (2) fuel flow-rate and (3) concentration. Methanol crossover was measured by gas chromatography as a function of these three parameters at 100 mA/cm 2 in the single-pass fuel delivery mode.
Bogdan Gurau, Eugene S Smotkin
openaire +1 more source
Influence of Methanol Crossover on the Fuel Utilization of Passive Direct Methanol Fuel Cell
Fuel Cells, 2008AbstractThe effect of methanol crossover on the fuel utilization of a passive direct methanol fuel cell (DMFC) was reported. The results revealed that the Faradaic efficiency decreased from 46.9 to 17.4% when methanol concentration increased from 1.0 to 8.0 mol L–1 at the lower current density 11.1 mA cm–2.
Q.‐Z. Lai +5 more
openaire +1 more source
Methanol and Water Crossover in a Passive Direct Methanol Fuel Cell: Mathematical Model
2016Methanol 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 +3 more
openaire +1 more source
The impact of mass transport and methanol crossover on the direct methanol fuel cell
Journal of Power Sources, 1999Abstract The performance of a liquid feed direct methanol fuel cell based on a Nafion® solid polymer electrolyte membrane is reported. The cell utilises a porous Pt–Ru-carbon supported catalyst anode. The effect of cell temperature, air cathode pressure, methanol fuel flow rate and methanol concentration on the power performance of a small-scale (9 ...
Scott K +3 more
openaire +3 more sources
Methanol Crossover Controlled by Porous Carbon Plate as Support
ECS Meeting Abstracts, 2006Abstract not Available.
Nobuyoshi Nakagawa, Kosuke Kamata
openaire +1 more source