Sustainable Process for Carbon Nano Onions from Flaxseed Oil for High-Performance Supercapacitors

Abstract

One of the global key challenge for our society is energy crisis and increasing environmental pollution arises from excessive consumption of fossil fuels. There is an increasing demand for long-term sustainable and durable energy storage devices with tremendous applications in electric, car power supply and wearable electronics. This requires simple, economical and green techniques for the fabrication of active materials to be used in energy storage devices. Supercapacaitor (SCs) as a promising energy storage device which uses electrical double layer (EDL) composed by electrolyte ions and charges on electrode materials surface, and the physisorption offer moderate energy density, high power density, stable life cycle and pollution free operation. With consideration to SCs performance depending on the physical interface, many efforts have been focused to improve electrochemical performance of SCs with high capacitance and higher voltage operated with electrolytes. Herein, we try to address both these critical issues exploring sustainable synthesis of carbon nano onions (CNOs) as the electrode material to fabricate high performance and durable SCs. An environmental-friendly flame synthesis approach was used for facile and large scale synthesis of CNOs for application in high-performance supercapacitors.