1D–3D Carbon Nanostructures for Flexible Supercapacitors

Carbon-based materials are generally and economically active electrode materials for supercapacitors because of their advantages including affordability, stability, and ease of availability. In the perspective of the researchers, multidimensional carbon-based materials such as carbon nanotubes, carbon nanofibers, graphene, activated carbon, etc., carbon-based nanocomposites and relevant electrolytes are crucial and important. The carbon-based nanostructured materials are most versatile and now exploited in the field of environmental science (remediation/purification) and renewable energy (both storage and generation). However, the genuine desire and need to prepare conventional carbon materials to increase sustainable configurations. Flexible and wearable devices are getting a significant amount of attention because of their potential applications in health care systems and human health monitoring. Carbon-based nanostructures are promising candidate for flexible supercapacitors because they combine advantages like structural and intrinsic flexibility, excellent electrical conductivity, great chemical and thermal stability, ease of chemical functionalization, light weight, and potential mass production. Because of their high power density and specific capacitance, efficient charge/discharge rate, and extraordinary flexibility, flexible supercapacitors have emerged as key technology in the energy storage system to support the portable and wearable devices. Future research will focus on developing novel materials to increase the energy density and economic viability of flexible supercapacitors.