Multi-Parameter Optimization of Siloxene-PANI Composites for High-Performance and Flexible Energy Storage Application

Abstract

The development of high-performance energy storage devices is crucial for various applications, such as electric vehicles, portable electronics, and renewable energy systems. Supercapacitors have emerged as a promising technology due to their high power density and long cycle life. However, their low energy density has limited their widespread application. To address this limitation, researchers have been exploring various strategies, including the use of new electrode materials and optimized electrode design. In this study, a high-energy-density energy storage device was developed using a composite material composed of siloxene and polyaniline (PANI) for flexible supercapacitor designs. Here, optimized material's surface area, pore distribution, and electronic transition, achieving a specific capacitance of 483 F/g at 1A/g in a three-electrode system using a 1 M H2SO4 electrolyte. The optimized material also exhibited a retention rate of 92.6% at 5A/g. The optimized siloxene-PANI composite material was then used to fabricate a flexible asymmetrical supercapacitor (SiP4//AC). The supercapacitor exhibited a high energy density of 19.7 Wh/kg at a power density of 248 W/kg, with a cyclic stability of 90.26% and a coulombic efficiency of 97%. The flexible design of the supercapacitor using the siloxene-PANI composite material allowed for its use in wearable electronics and other applications requiring high-performance, flexible energy storage devices. The study provides valuable insights into the development of energy storage devices with high energy density and high power density, which will pave the way for the practical application of supercapacitors in various fields.