Abstract
Rich surface functionalization and active electrolyte-accessible supercapacitors are considered promising tools for enhanced energy storage capacity due to their high specific capacity and simple construction. One of the challenges in technical applications of recently developed MXene is that it causes phase transition and structural decomposition over time without delamination. Thus, a simple but effective method for increasing the stability of exfoliated MXene (Ti3C2Tx) by passivating exposed edges with Tetramethyl Ammonium Hydroxide (TMAOH) has been adopted here. In this work, we performed this delaminated MXene (DLMX) supported Nickel oxide (NiO) by three different synthesizing routes for composite preparation which have been thoroughly discussed. Bath Sonication assisted DLMX/NiO was found to increase oxygen-containing surface functionalities, surface area, and uniform delivery of partner composite, enhancing the electrochemical properties compared to Solvothermal and in situ-delamination synthesis. At a current density of 1 A/g, the fabricated electrode material exhibited a maximum capacity of 770C/g. After 3500 cycles a remarkable cycling performance of 97.2 % capacity retention and reached 88.1 % after 5000 cycles at 8 A/g current density. The as-assembled supercapacitor device has an energy density of up to 73 Wh kg−1 and a power density of 900 W kg−1 signifying an excellent device prospect, making them more practicable for marketable devices for advanced energy storage applications.
Published Version
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