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arXiv · 1905.00202

Two Dimensional heterostructure and its application in efficient quantum energy storage

Meenakshi Talukdar·Sushant Kumar Behera·Pritam Deb
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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-C$_3$N$_4$) & pseudocapacitive (FeNi$_3$) 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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Meenakshi Talukdar, Sushant Kumar Behera, Pritam Deb. 2019-05-01. Two Dimensional heterostructure and its application in efficient quantum energy storage. https://doi.org/10.1039/c9dt02423a

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