**5. Conclusions**

In summary, this chapter focuses on the synthesis methods and applications of g-C3N4 and g-C3N4-based materials in energy storage. Because of its unique characteristics and wide range of applications, g-C3N4 is a good candidate for effective energy storage. As a result, research into g-C3N4-based composites for energy storage and conversion is expected to pick up speed in the near future. Despite significant progress over the years, there are still numerous hurdles in the use of this material in catalysis.
