NiCo2S4‐Based Composite Materials for Supercapacitors

Abstract In recent years, spinel‐type NiCo 2 S 4 has been intensively studied as a supercapacitive material as it has a high theoretical capacitance, and is inexpensive and easy to synthesize. However, NiCo 2 S 4 alone as an electrode material suffers from the drawback of an unsatisfactory cycling stability. In order to achieve better electrochemical performances, NiCo 2 S 4 ‐based composite materials have been developed for supercapacitors. In this Review, some recent research progress on NiCo 2 S 4 ‐based composite materials for supercapacitors is outlined. Furthermore, some suggestions for the further improvement of NiCo 2 S 4 ‐based materials for hybrid supercapacitors and the development of large‐scale synthesis methods are proposed.