Review on key technologies and applications of hydrogen energy storage system

With the rapid development of renewable energy in China, it is an urgency issue to solve the power accommodation and synchronization problems of renewable energy. Large-scale energy storage is known as the most effective way to solve this problem. Compared with the existed energy storage form, a hydrogen energy storage system consisting of electrical energy chain and hydrogen energy chain is proposed. The analysis is focused on the key technologies of hydrogen energy storage, including hydrogen production, hydrogen storage and transportation, hydrogen fuel cells. Key components and system performance of different types of hydrogen energy storage systems, including electrolytic cells, fuel cells and drogen storage materials, are also compared and analysed. The main demonstration plants of the system in Germany and France are introduced. Finally, the development trend of hydrogen energy storage system is presented.