Supercapacitor

playing an important role in distributed micro-grid and new energy vehicles

has advantages of high power density and long operation life.In order to further improve the energy density

a lithium-ion supercapacitor with advantages of lithium ion batteries and supercapacitor was proposed.However

disadvantages of high cost and immature technology limit its large-scale application.On the basis of the basic principle of lithium-ion supercapacitor

we divide it into three categories

and review the research status of electrode materials.Moreover

we summarize the existent problems and the trend of the development of composite material

and present the focus of electrode material research in the future composite materials

MOFs materials and flexible materials.