What are the desired characteristics of fuel cell membrane?
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What are the desired characteristics of fuel cell membrane?
Desirable characteristics of fuel cell electrolytes are not only high ionic conductivity (which results in high efficiency), but also impermeability to gases, negligible electronic conductivity, chemical stability under a wide range of conditions, and good mechanical integrity.
What membrane is used in fuel cell?
Polymer Electrolyte Membrane Fuel Cells
Polymer Electrolyte Membrane Fuel Cells Polymer electrolyte membrane (PEM) fuel cells, also called proton exchange membrane fuel cells, use a proton-conducting polymer membrane as the electrolyte. Hydrogen is typically used as the fuel.
What are the four main parts of a PEM?
The membrane, catalyst layers (anode and cathode), and diffusion media together form the membrane electrode assembly (MEA) of a PEM fuel cell.
What is characteristic of all fuel cells?
From chemical energy to electrical energy. A fuel cell (actually a group of cells) has essentially the same kinds of components as a battery. As in the latter, each cell of a fuel cell system has a matching pair of electrodes. These are the anode, which supplies electrons, and the cathode, which absorbs electrons.
What are the factors which determine the efficiency of a fuel cell?
The load current, temperature, relative humidity, membrane thickness, membrane-active area, electrode active area, corrosion, purity, pressure, and concentration of hydrogen fuel, maintenance of water inside the cell, pressure in the electrode particularly on both side of the membrane etc. are the factors.
What are the three main components of a fuel cell?
There are many types of fuel cells, but they all consist of an anode, a cathode, and an electrolyte that allows ions, often positively charged hydrogen ions (protons), to move between the two sides of the fuel cell.
What is characterization of fuel?
Characterization describes what a fuel is and how it can be effectively used. Since the establishment of our Coal Services Group in the early 1970s, Hazen has developed extensive capabilities for solid-fuels analysis, characterization, research, and process development.
Why is it necessary to characterize a fuel cell?
By characterizing the fuel cell properly, you can understand why the fuel cell is performing well or poorly. These techniques help discriminate between activation, ohmic and concentration losses, fuel crossover, and defective materials.
What are the most desirable characteristics of fuel cell electrolytes?
It should have good water uptakes at high temperatures of about 100°C. It should be resistant and have extremely low permeability to reactant gases to minimize columbic inefficiency.
What is the electrolyte in PEM?
perfluorinated sulfonic acid polymer
PEM electrolysis uses a proton-conducting perfluorinated sulfonic acid polymer as the electrolyte and as a binder within the electrode layers.
Why do we want to characterize a fuel cell?
What is fuel and how the fuel is classified?
Fuel is a combustible substance that mostly consists of carbon. On proper burning in the presence of air, Fuel releases a considerable amount of energy in the form of heat and light. There are different classifications of fuels, like natural and artificial fuels.
What is a characteristic of all fuel cells?
What is a characteristic of all fuel cells? Electrical energy is produced from oxidation reactions.
What are the characteristics of fuel cells?
Fuel cells work like batteries, but they do not run down or need recharging. They produce electricity and heat as long as fuel is supplied. A fuel cell consists of two electrodes—a negative electrode (or anode) and a positive electrode (or cathode)—sandwiched around an electrolyte.
