Two Dimensional heterostructure and its application in efficient quantum energy storage
Abstract
Portable miniaturized energy storage micro-supercapacitor has engrossed significant attention due to its power source and energy storage capacity, replacing batteries in ultra-small electronic devices. Fabrication with porous and 2D graphitic nanomaterials with high conductivity and surface area signify high performance of micro-supercapacitor. In order to satisfy the fast-growing energy demands for the next-generation, we report performance and design of a 2D heterostructure of EDLC (g-C3N4) & pseudocapacitive (FeNi3) resulting low ionic diffusion path and prominent charge storage based on their synergic functionalities. This heterostructure system shows an enhanced quantum capacitance (38% enhancement) due to delocalized states near Fermi level. Having achieved the areal capacitance of 19.21 mFcm-2, capacitive retention (94%), enhanced power density (17 fold) having ultrahigh energy density of 0.30 Wh.cm-3 and stability of the material even without any obvious degradation after 1000 cycles, this smart heterostructure acts as a new platform for designing high-performance in-plane micro-supercapacitor.
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