Nanostructured intercalation compounds as cathode materials for supercapacitors

This article reviews the research progress in the intercalation compounds for cathode materials for supercapacitors. Typical methods to prepare various intercalation compounds with different nanostructures are summarized. More specifically, the approaches can be subdivided into physical routes such as sonication and microwaves, and chemical routes such as hydrothermal, sol-gel and template methods. The most recent work on nanostructured intercalation compounds including LiCoO 2 , LiMn 2 O 4 , Li[Ni 1/3 Co 1/3 Mn 1/3 ]O 2 , Li 1+x V 3 O 8 , Na x MnO 2 , and K x MnO 2 is mainly focused including their preparation and electrochemical performance, and new trends in nanomaterials development for supercapacitors are pointed out.