LAUSR

The increased demand of energy due to the recent technological advances in diverse fields such as portable electronics and electric vehicles are often hindered by the poor capability of energy-storage systems. Although supercapacitors (SCs) exhibit high power density than state-of-the art batteries, their insufficient energy density remains a major challenge. An emerging concept of hybrid supercapacitors (HSCs) with the combination of one capacitive and one battery electrode in a single cell holds a great promise to deliver high energy density without sacrificing power density and cycling stability. This review elaborate the recent advances of use of nickel cobaltite (NiCo 2 O 4 ) as a potential positive electrode (battery-like) for hybrid supercapacitors (HSC). A brief introduction on the structural benefits and charge storage mechanisms of NiCo 2 O 4 is provided. It further shed a light on composites of NiCo 2 O 4 with different materials like carbon, polymers, metal oxides etc. which altogether helps in increasing the electrochemical performance of HSCs. Finally review concluded the key scientific challenges and perspectives on building high performance HSCs for future generation applications.