Natural Kapok fiber-derived two-dimensional carbonized sheets as sustainable electrode material
Vinay Gangaraju,
Navya Rani M,
Kunal Roy,
Tathagata Sardar,
Manikanta P Narayanaswamy,
Murthy Muniyappa,
Prasanna D Shivaramu,
Dinesh Rangappa
Affiliations
Vinay Gangaraju
Department of Applied Sciences (Nanotechnology), Centre for Post Graduate Studies, Visvesvaraya Technological University, Muddenahalli, Chikkaballapura, 562101, India
Navya Rani M
Research and Development Centre, Nagarjuna College of Engineering and Technology, Devanahalli, 562110, India; Corresponding authors.
Kunal Roy
Department of Applied Sciences (Nanotechnology), Centre for Post Graduate Studies, Visvesvaraya Technological University, Muddenahalli, Chikkaballapura, 562101, India
Tathagata Sardar
Department of Applied Sciences (Nanotechnology), Centre for Post Graduate Studies, Visvesvaraya Technological University, Muddenahalli, Chikkaballapura, 562101, India
Manikanta P Narayanaswamy
Department of Applied Sciences (Nanotechnology), Centre for Post Graduate Studies, Visvesvaraya Technological University, Muddenahalli, Chikkaballapura, 562101, India
Murthy Muniyappa
Department of Electronics and Communication, Nitte Meenakshi Institute of Technology, Govindapura, Yelahanka, Karnataka 560064, India
Prasanna D Shivaramu
Department of Applied Sciences (Nanotechnology), Centre for Post Graduate Studies, Visvesvaraya Technological University, Muddenahalli, Chikkaballapura, 562101, India
Dinesh Rangappa
Department of Applied Sciences (Nanotechnology), Centre for Post Graduate Studies, Visvesvaraya Technological University, Muddenahalli, Chikkaballapura, 562101, India; Corresponding authors.
Natural biomass-derived carbon nanostructures have attracted research interest because of their unique surface and electrochemical properties. The present study embodied the carbonized micro-nano sheets derived from the low-cost natural source Kapok silk fiber. The material was obtained via a facile thermal pyrolysis process. Diffraction analysis showed a broad graphene structure-like peak, indicating the formation of graphene-like carbon nanosheets. Field emission scanning electron microscope (FESEM) and transmission electron microscopic (TEM) images confirmed the presence of fragmented carbon sheets, some of which were folded to form a tube-like structure. Raman study showed the presence of D and G band with the Id/Ig ratio of 0.96 which indicated the formation of few-layered carbon nanosheets. Furthermore, the electrochemical performance was evaluated for lithium-ion battery as well as supercapacitor. A specific capacity of 465 mAh.g-1 at 0.1 C rate for Li-ion battery and a specific capacitance of 473.61 F.g-1 for supercapacitor have been obtained with the capacitance retention of 95 %. This study provides insights into a strategy for the sustainable production and utilization of natural fiber-based carbon in energy storage systems.
