High energy density supercapattery empowered by efficient binder-free three-dimensional carbon coated NiCo2O4/Ni battery and Fe3S4@NiCo pseudocapacitive electrodes

Through the progress of science and technology, the findings of supercharged electrodes are provoked to design the electrode material. Herein, a novel electrode made up of binary metallic oxide surrounded by a carbon matrix is designed as the positive electrode material that is substantially more active and efficient than the most re-ported electrode materials. The as-synthesized 3D-C-NiCo2O4 electrode revealed a specific capacity of 558.3C g-1 at 1 A g-1. Likewise, the 3D-Fe3S4@NiCo/SS electrode is effectively synthesized via the vapour phase growth method that worked as a negative pseudocapacitive material. It provides a gravimetric capacitance of 808.05 F g-1 at 1 A g-1. Moreover, the assembled 3D-C-NiCo2O4//3D-Fe3S4@NiCo/SS reveals a higher gravimetric capacitance of 150 F g-1 at 1 A g-1 with 70 % stability over 10,000 cycles. It offers a maximum energy and power density of 49.8 Wh kg- 1 and 8100 W kg -1, respectively. These exceptional outcomes highlight that the as -fabricated 3D-C-NiCo2O4//3D-Fe3S4@NiCo/SS device can be an ultimatum source for high-performance energy findings. The present result demonstrates the combined approach of prepared electrodes, merits of battery type 3D-C-NiCo2O4 electrode, and the faradaic capacitance of 3D-Fe3S4@NiCo electrode.

Automated summary

Through the progress of science and technology, a novel electrode material made of binary metallic oxide surrounded by a carbon matrix has been designed. It shows significantly improved activity and efficiency compared to reported electrode materials. In addition, a negative pseudocapacitive material 3D-Fe3S4@NiCo/SS has been successfully synthesized. By combining these two materials, the assembled device exhibits superior performance and stability, making it an ideal source for high-performance energy findings.