Abstract: Chemical energy is the inherent energy available in huge amounts for our utilization where most wanted form of energy is electrical energy. The way that we can meet the requirements of electrical energy is given by fuel cells through chemical energy by providing a fuel and an oxidant we can produce electrical energy that is used in different spheres of requirements over the world. Through fuel cells chemical energy of reactants is converted into low voltage DC electricity.

In this paper the components of fuel cells, chemical reaction steps adopted in conversion, types of fuel cells, fuel cells and their impact on environment, safety and reliability, current position and disadvantages are raised and giving rise to the beneficial adoption of fuel cell mechanism

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