Low Temperature Hydrogen-Oxygen Cells

It is, in many ways, convenient to classify fuel cells according to their temperature of operation although obviously some characteristics and properties will not vary with the temperature of operation of the system. Thus in this chapter hydrogen-oxygen cells working at temperatures below about 100 °C and at low pressures (up to about 5 atm) are described, and subsequent chapters deal with other low temperature systems, and with cells working at medium (100–500 °C) or high temperatures (above 500 °C). Certain rather special types of fuel cell, such as the biochemical cell, are dealt with separately.