A hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. Its basic principle is the reverse reaction of water electrolysis. Hydrogen and oxygen are supplied to the anode and cathode, respectively. After hydrogen diffuses outward through the anode and reacts with the electrolyte, it releases electrons and reaches the cathode through an external load.
Hydrogen fuel cells have three main characteristics.
First, it is pollution-free. Fuel cells operate through electrochemical reactions, rather than through combustion (gasoline, diesel) or energy storage (batteries). Combustion in fuel cells releases pollutants such as COx, NOx, SOx gases, and dust. In other words, fuel cells only produce water and heat. If hydrogen is generated from renewable energy sources (photovoltaic panels, wind power, etc.), the entire cycle is a process completely free of harmful emissions.
Secondly, it is noiseless. Fuel cells operate quietly, with a noise level of only about 55 dB, equivalent to normal conversation. This makes fuel cells suitable for indoor installation or outdoor locations where noise is a constraint.
Third, it is highly efficient. The power generation efficiency of fuel cells can reach more than 50%, which is determined by the conversion nature of fuel cells, which directly converts chemical energy into electrical energy without the intermediate conversion of thermal energy and mechanical energy (generator).
