Abstract
Activated carbon (AC) and multiwalled carbon nanotubes (MWCNTs) have been extensively investigated in recent decades as electrical double-layer capacitor (EDLC) electrode materials for supercapacitors, owing to their superior capacitive properties and cycling stability performance. However, in the modern electronics industry, ternary electrode materials have been designed to develop high-performance and efficient energy storage devices. EDLC-based ternary materials are of great importance, where all the present components participate both individually and as a multicomponent electrode system to promote high-electrochemical performance electrode materials. In this study, we have incorporated an optimized content of boron nitride nanotube (BNNT) powder into a binary material composed of AC and MWCNTs to enhance their electrochemical performance using a pneumatic printer. The printed MWCNTs/AC/BNNTs ternary composite electrode material has shown a maximum specific capacitance of 262 F g−1 at a minimum current density of 1 A g−1, with a capacitance retention of 49.61% at a maximum current density of 10 A g−1. These results demonstrate that the printable MWCNTs/AC/BNNTs ternary composite electrode material is a potential candidate for the development of high-performance supercapacitors.
Highlights
The kinetics of the electrical conductivity of the multiwalled carbon nanotubes (MWCNTs)/activated carbon (AC)/boron nitride nanotube (BNNT) composite electrode material were studied by electrochemical impedance spectroscopy (EIS) in the frequency range of 100 kHz to 0.01 Hz at the same electrochemical station
MWCNTs/AC/BNNTs ternary ternary composite material is well described in the experimental section and shownin composite material is well described in the experimental section and is isshown inFigure
MWCNTs/AC/BNNTs ternary compositefor electrode material for supercapacitor applications was successfully developed in this study
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Binary EDLC materials have shown improved electrochemical performance but still the reported performance of these materials remains insufficient for the development of high-performance supercapacitors. Qiang et al fabricated an electrospun carbon nanofiber/graphene composite electrode material for a supercapacitor and reported a specific capacitance of 183 F g−1 [10]. There are various binary and ternary EDLC composite electrode materials reported for supercapacitor applications; according to our literature survey, the printed. Hierarchically porous structures and composite materials can be printed, which have the advantage to enhance the electrochemical performance of energy storage devices [17]. The printed MWCNTs/AC/BNNTs composite electrode has shown a high specific capacitance value of 262 F g−1 at a minimum current density of 1 A g−1. 49.61% at a maximum current density of 10 A g−1
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