Analysis of the Development Trend of China's Electricity-Hydrogen Energy Technology Research Based on Bibliometrics

China is committed to building a new power system, in which hydrogen energy is an important carrier of renewable energy power generation and also an important medium to connect renewable energy and diversified terminal energy demand. In order to grasp the development trend of China's electricity-hydrogen energy technology research, this paper takes the relevant high-level Chinese journal papers as the research objects, which were published from 2013 to 2022 and are included in China National Knowledge Infrastructure (CNKI) database. The software, CiteSpace, was used to conduct a quantitative analysis of the overall status, hot themes and future development trend of China's electricity-hydrogen energy technology research. The results show that China's research in this field has been in a rapid development period since 2021. There are four hot themes in this field from 2013 to 2022: the application of power-to-gas (P2G) technology in renewable energy consumption and integrated energy system; fuel cell combined heat and power; preparation method, application and performance of hydrogen storage materials (especially hydrogen storage alloys); catalyst for hydrogen production from water electrolysis and hydrogen evolution reaction. In the next few years, the research focus of China's electricity-hydrogen energy technology will be the promotion of renewable energy consumption with the P2G technology, and the microgrid or integrated energy system with hydrogen energy storage. This paper can provide scientific reference for the R&D deployment of electricity-hydrogen energy technology in China and even the world in the future.