Keithley 2581 Fuel Cell free download

File name 2581 Fuel Cell.pdf

A G R E AT E R M E A S U R E O F C O N F I D E N C E ing the final cathode reactant. Measurements of these electrical and ionic currents are ex- tremely useful in understanding a fuel cell's characteristics and operation. Cell Energy and Voltage A key variable in describing cell charac- teristics is a quantity called the Gibbs free energy. This describes the amount of free energy or chemical energy that a material possesses. Cell voltage and other electrical characteristics are related to the Gibbs free energy, which is a function of the electronic structure of the molecules undergoing reac- tion. In the case of a hydrogen fuel cell, the total energy available from its chemical re- Unraveling actions is equal to the free energy of the H2 and O2 reactants, minus the free energy of the reaction product, H2O. Fuel Cell Electrical The potential difference(voltage) devel- oped from the cell's electrical energy can be