A Flexible and Binderless Thienothiophene Single-Wall Carbon Nanotube-Based Hybrid Electrode: Design, Synthesis, and Supercapacitor Applications

Abstract

A robust cycle life and high energy and power density are essential for storing energy. In addition, flexible and self-supporting electrodes play a crucial role in supercapacitor applications. Herein, we present the use of a thienothiophene and single-walled carbon-nanotube-based hybrid material, TT-HB-SWCNT, as a highly efficient symmetrical supercapacitor having flexible and self-standing properties. It serves as a flexible free-standing electrode in a two-electrode system for both supercapacitor and energy storage purposes. The developed hybrid electrode demonstrates an appropriate energy density for its application in supercapacitors, exhibiting a C-rate capability that aligns with the operational range of symmetrical supercapacitors. Moreover, regarding the GCD curves of the first and last five cycles, it is evident that charge and discharge occur with high reversibility of 10,000 cycles. It displayed a high energy storage capacity of 57.44 F•g −1 at 4 A•g −1 current density and a maximum power density of 2000 W•kg −1 , demonstrating that TT-HB-SWCNT is a promising hybrid nanomaterial for high-performance energy storage applications.