Hydrogen energy can be said to be one of the most promising new energy sources at present, and it is most likely to become an important secondary energy in the world energy stage in the 21st century. As a relatively superior new energy, hydrogen energy is the most widely distributed matter in the universe, constituting 75% of the mass of the universe, so it is also known as the ultimate energy of mankind.

The main advantage of hydrogen energy is its high combustion calorific value, and the average heat per kilogram of hydrogen combustion can reach 3 times that of gasoline, 3.9 times that of alcohol and 4.5 times that of coke. Since the only product of hydrogen combustion is water, hydrogen energy is the world's cleanest energy source. The water produced by its combustion can also be broken down again into hydrogen, achieving a virtuous cycle. In addition, because light is made from water, and water is the most abundant resource on Earth, hydrogen energy resources are also abundant.

The current hydrogen production method is mainly through fossil energy as a raw material to produce "gray hydrogen", but with the improvement of the scale of clean energy power generation and the progress of related technologies, electrolytic water hydrogen production is bound to become the mainstream production method in the future. This is a relatively convenient method of producing hydrogen, only need to be filled with electrolyte electrolytic cell through the direct current, the water molecules on the electrode will occur electrochemical reaction, thus decomposing into hydrogen and oxygen. However, hydrogen production by electrolytic water is not as easy as imagined, and hydrogen energy storage is also facing high costs and dangers, which has become the direction of continuous efforts of major hydrogen production enterprises, only continuous research and innovation technology, in order to solve the difficulties and pain points in the application of hydrogen energy.

In addition to hydrogen energy production, hydrogen energy storage and transportation are also important links in the hydrogen energy industry. At present, hydrogen energy storage can be divided into gas storage, liquid storage and solid storage three ways. Among them, gaseous storage is the most common way, which is lower cost, faster recharge and discharge, and can be operated at room temperature. However, this method also has safety risks, because of the low density of gaseous hydrogen, its storage reference may be too large, which may cause problems such as container leakage or explosion.

In general, with the globalization of energy transformation and low-carbon development, the importance of hydrogen energy is increasing, but the related technical problems have not been properly solved, which still need to be further explored and researched.