How it works?
Fuel cell is an electrochemical energy conversion device. Fuel cell uses hydrogen or hydrocarbon fuels as fuel and produces electricity. Heat and clean water are by-products of the process.
Fuel cell has three main component parts: anode, cathode and electrolyte. The anode and the cathode have relatively high porosity which allows gases to pass through them. Depending on the type of the fuel cell, the electrolyte, between the anode and the cathode, conducts either oxygen ions from the cathode to the anode (e.g. in SOFC), or protons from the anode to the cathode (e.g. in PEMFC). In order to balance the process, electrons return through an external circuit from the anode to the electron deficient cathode, producing a flow of electrons, or electricity. Because of the losses in the electrochemical process at the electrodes, and the resistance of the electrolyte, heat is also generated.