Stacked NiCoSe clusters decorated cross-shaped star-like MOF-derived NiCo2O4 heterojunction for hybrid supercapacitors

In view of the inadequate energy density of hybrid supercapacitors , developing high-performance heterojunction electrodes is a promising strategy to solve this problem. However, the precise design and synthesis of heterojunction structure remains a challenge. In this work, a stacked NiCoSe clusters decorated cross-shaped star-like MOF-derived NiCo 2 O 4 heterojunction (MOF-NiCo 2 O 4 @NiCoSe) was well-defined designed. The abundant heterogeneous interfaces and unique structure provide a large reactive area and structural stability during charge and discharge, thus facilitating the electrochemical reaction kinetics and boosting the electrochemical properties of electrode. Impressively, the obtained MOF-NiCo 2 O 4 @NiCoSe exhibits an excellent specific capacitance of 1266 F g −1 at 1 A g −1 , outstanding multiplicative performance (91.6 % at 10 A g −1 ) and favorable cycling stability. In addition, the assembled device equipped with MOF-NiCo 2 O 4 @NiCoSe cathode exhibits uplifting electrochemical features in terms of a maximum energy density of 52.0 Wh kg −1 at a power density of 800.0 W kg −1 along with a high capacitance retention after 10,000 cycles. • Stacked NiCoSe clusters is decorated on cross-shaped star-like MOF-derived NiCo 2 O 4 . • MOF-NiCo 2 O 4 /NiCoSe electrode exhibits a high specific capacitance of 1266 F g −1 . • The electrode delivers an excellent capacitance retention of 91.6% at 10 A g −1 . • The device shows a maximum energy density of 52.0 Wh kg −1 at 800.0 W kg −1 .