MOF-derived Co₃O₄-C/Ni₂P₂O₇ electrode material for high performance supercapacitors

Nickel pyrophosphate (Ni₂P₂O₇) is considered as a potential next-generation electrode material for supercapacitors. Here, we report a new type of cathode material for supercapacitors in, which consists of rhombic dodecahedron Co₃O₄-C growing on two-dimensional (2D) Ni₂P₂O₇ nanosheets. Surprisingly, Co₃O₄-C/Ni₂P₂O₇ materials exhibit bright electrochemical properties with a relatively high specific capacitance of 2537.78 Fg⁻¹ and remarkable cyclic stability (88.5% after 3000 cycles). Therefore, the prepared Co₃O₄-C/Ni₂P₂O₇ electrode material is a significant candidate material for supercapacitors. The synthesis process is simple, low cost and environmentally friendly. Notably, Co₃O₄-C/Ni₂P₂O₇ products have excellent electrochemical properties and are candidate electrode materials for supercapacitors. The Co₃O₄-C/Ni₂P₂O₇ products have excellent electrochemical properties, which indicate the Co₃O₄-C/Ni₂P₂O₇ materials imply their promising potential applications in the energy storage. Most importantly, this work provides a scalable strategy for morphology-controlled synthesis of metal oxides by recrystallization.