Bimetal Pyrophosphate of CoNiP2O7@polypyrrole Nanocomposite‐ Based Electrode for Hybrid Supercapacitor Applications

A significant challenge in the realm of asynchronous capacitors is the development of innovative electrode materials with improved electrochemical behaviour and increased cycles. In this article, a new method is proposed for the facile synthesis of bi metal pyrophosphate anchored on polypyrrole (CoNiP2O7/NF@PPy) utilizing the hydrothermal and polymerization procedures. Cobalt nickel pyrophosphate nanoarrays are created, and they are successfully used as an electrode material for supercapacitors. The novelty of this work, a novel electrode of binder free mixed metal pyrophosphate (CoNiP2O7) composited to conducting polymer of polypyrrole is developed. Then, the prepared CoNiP2O7/NF CoNiP2O7/NF@PPy electrodes capacitive and diffusive mechanism discussed by using Trassati method. In electrochemical experiments, the CoNiP2O7/NF@PPy composite showed considerably enhanced specific capacity (1202 mAhg−1), which is much greater than that of pure CoNiP2O7/NF (819 mAhg−1). Additionally, the hybrid supercapacitor (CoNiP2O7/NF@PPy//AC) device manufactured had the highest energy density of 94.6 Wh kg−1. These findings indicate that this composite is a promising option for electrochemical capacitors. In presented work, we developed hybrid supercpcitor device (HSC). The developed HSC device has a high specific capacitance of 390 Cg−1 at a current density of 2 Ag−1. The developed HSC device exhibits outstanding cyclic stability of 90.7% after 10 000 cycles. The HSC device demonstrates remarkable energy densities of 94.6 Whkg−1 and 2791 Wkg−1 at current densities of 2 Ag−1.