Metal Phosphates/Phosphonates for Fuel Cells

The rapid development of the era of social electrification has put forward higher requirements for sustainable and clean energy. The development of high-performance energy storage devices is the key to meeting the above requirements, among which fuel cells have been widely used due to their high work efficiency, high energy density, and long cycle life. In recent years, metal phosphates/phosphonates have attracted extensive research as fuel cell materials due to their abundant resources, environmental protection, and low cost. It is worth noting that the nanostructure design of metal phosphates and phosphonates has an important impact on improving their performance. In this chapter, we introduce the synthetic strategies of metal phosphates/phosphonates and the recent progress in their applications in the field of fuel cells. The phosphate/phosphonate moiety can act as a ligand site/linker due to its strong affinity for the metal center, which enables diverse synthetic strategies for metal phosphates/phosphonates. Through the structural design of metal phosphates/phosphonates, great progress has been made in the application of metal phosphates/phosphonates as functional materials in the field of fuel cells. However, there are still some key problems to be solved in the practical application process. Metal phosphates/phosphonates as functional materials have made great progress in the field of fuel cells; however, there are still many key problems to be solved. Finally, the future development direction of enhancing the electrochemical properties of metal phosphates/phosphonates-based fuel cells has been prospected.