Chapter 2 Echem Thermodynamics

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University of Ottawa *

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CH8662

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Chemistry

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Oct 30, 2023

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pdf

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30

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Chapter 2: ELECTROCHEMICAL THERMODYNAMICS APPLICATION TO FUEL CELLS CHG8300F Electrochemical Engineering Elena Baranova, University of Ottawa
2 • The fuel cell was invented over 170 years ago (1839). At the time, problems with the materials, along with the invention of the combustion engine and the electric generator conspired to prevent a rollout of fuel cell technology. • Not until the 1960s was the technology rediscovered by astronautics, where cost and lavish research programs don't matter. • Due to increasing environmental pollution and our limited reserves of fossil sources of energy, new environmentally friendly fuels and efficient energy converters are in great demand. This serves to drive the research and development of fuel cells. Fuel cells
3 • The way a fuel cell works is basically the opposite of the principle of an electrolysis cell. • In a fuel cell, chemical energy from hydrogen and oxygen (or air) is directly converted to electrical energy, i.e. without a combustion process. All fuel cells essentially consist of two electrodes (cathode and anode) and an electrolyte (medium for transporting the ions), which separates the two electrodes from each other. • Fuel cells are usually classified by the type of electrolyte used. Other traits they may differ in include Service Temperature, Efficiency, and Field of application. Fuel cells
4 In a fuel cell, chemical energy from hydrogen and oxygen (or air) is directly converted to electrical energy, i.e. without a combustion process. Fuel cells
5 Fuel cells CHG8191- Dr. Elena Baranova
6 Renewable energy Solar hydrogen technology makes it possible. Using electrolysis, available solar or wind energy is used to produce hydrogen. This is temporarily stored and used for generating power via the fuel cell anytime is needed. A clean solution indeed!
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