Spinel-based electrode materials for application in electrochemical supercapacitors – present status and future prospects

Abstract

Electrochemical supercapacitors are prominent power sources of today, which store and release energy by reversible adsorption and desorption of ions at the interfaces between electrode materials and electrolytes. Spinel-based nano-structured materials are assumed to be promising candidates of electrode materials for supercapacitors, because of electrical conductivity, electroactive sites, thermal stability, flexibility, specific capacitance, and cycling stability. Spinel binary transition metal oxides, such as, NiFe₂O₄, ZnCo₂O₄, MgCo₂O₄, CuCo₂O₄, NiCo₂O₄, ZnMn₂O₄, and CoMn₂O₄ give a wide extend of choices for supercapacitor. In this work, we explained different spinel structured electrode materials such as Mn-, Fe-, Co-based ones and their energy storage performances for designing supercapacitors.

Graphical Abstract

Keywords:

• Spinel
• electrode materials
• supercapacitors

Acknowledgments

The authors (VJ, VJ and ASN) would like to thank and acknowledge Karunya Institute of Technology and Sciences for providing necessary facilities to initiate ‘Supercapacitors based research activity’ in the Department of Applied Chemistry.

Disclosure statement

No potential conflict of interest was reported by the authors.