Fuel Cell Research TrendsNova Publishers, 2007 - 486 A fuel cell is an electrochemical energy conversion device. It produces electricity from external supplies of fuel (on the anode side) and oxidant (on the cathode side). These react in the presence of an electrolyte. Generally, the reactants flow in and reaction products flow out while the electrolyte remains in the cell. Fuel cells can operate virtually continuously as long as the necessary flows are maintained. Fuel cells differ from batteries in that they consume reactants, which must be replenished, while batteries store electrical energy chemically in a closed system. Additionally, while the electrodes within a battery react and change as a battery is charged or discharged, a fuel cell's electrodes are catalytic and relatively stable. Fuel cells are very useful as power sources in remote locations, such as spacecraft, remote weather stations, large parks, rural locations, and in certain military applications. A fuel cell system running on hydrogen can be compact, lightweight and has no major moving parts. Because fuel cells have no moving parts, and do not involve combustion, in ideal conditions they can achieve up to 99.9999% reliability. This equates to less than one minute of down time in a six year period. This book presents new leading-edge research in the field. |
Spis treści
9 | |
Experimental Activity on a Large SOFC Genarator | 71 |
Alternative Sulfonated Polymers to Nafion for PEM Fuel Cell | 135 |
A Potential Alternative in the Electric Utility | 161 |
Microfabrication Techniques Useful Tools for Miniaturizing Fuel Cells | 211 |
Technical H₂ Electrodes for Low Temperature Fuel Cells | 247 |
PEM Fuel Cell Modeling | 273 |
Surface Functionalization of Carbon CatalystSupport for PEM Fuel Cells A Review | 381 |
A Study on the Role of Carbon Support Materials for FuelCell Catalysts | 411 |
Development of Alkaline Solid Polymer Electrolyte Membranes Based on Polyvinyl Alcohol and Their Applications in Electrochemical Cells | 445 |
473 | |
Kluczowe wyrazy i wyrażenia
1.0M methanol 22 cm² electrode A/cm² acid activation overpotential air as oxidant air stoichs alkaline anode carbon blacks carbon support catalyst layer cathode Cell Height cell potential cell voltage Cell Width cm² electrode area decrease distribution DMFC single cell DMFC stack DMFC system efficiency and energy electrochemical electrode electrolyte energy density energy efficiency equation exchange current density experimental Figure fuel cell stack fuel utilization functional groups gas diffusion layers gas turbine GNFs hydrogen increasing ionomer liquid water load MeOH methanol as fuel methanol concentration methanol crossover Nafion nanoparticles nominal current density O2 as oxidant operating temperatures output overall fuel consumption overpotential oxygen parameters partial pressure particles peak energy efficiency peak power PEM fuel cell PEMFC potential power density Power Sources proton conductivity PTFE reactants reaction S-PEEK sectors silicon simulation SOFC stack and system stack with 22 sulfonated sulfonic acid transport voltage sensitivity Wh/Kg