Amide-enriched pod-based carbon nanospheres for enhancing supercapacitor performance: A value-added approach for solid state supercapacitors

Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 121, P. 116590 - 116590

Published: April 12, 2025

Language: Английский

Turning mango kernel waste into high-energy porous carbon: a sustainable electrode material for high-performance supercapacitors with exceptional stability

RSC Advances, Journal Year: 2025, Volume and Issue: 15(18), P. 14183 - 14193

Published: Jan. 1, 2025

This study explores the sustainable production of high-performance supercapacitor electrodes from waste mango kernels, addressing growing need for eco-friendly energy storage solutions. Porous carbon materials were synthesized via pyrolysis at varying temperatures (700, 800, 900, and 1000 °C), designated as MK7, MK8, MK9, MK10, respectively. The was obtained a simple carbonization, yielding highly porous structure with large specific surface area 1348.9 m2 g-1, MK9 material confirmed by BET analysis. Raman spectroscopy revealed high degree graphitization D G bands, indicating presence both disordered graphitic domains. SEM imaging showed well-developed, interconnected morphology, while XRD patterns amorphous nature partially crystalline resulting evaluated their electrochemical performance in applications. Electrochemical characterization that sample, pyrolyzed 900 °C, exhibited highest capacitance 205.8 F surpassing other samples. To optimize device performance, symmetric supercapacitors fabricated using CR2032 coin cell configuration different electrolytes concentrations. KOH electrolyte demonstrated maximum power density 5137.86 W kg-1, an 12.32 h 112.4 g-1. Furthermore, this excellent cycling stability, maintaining its over 100 000 galvanostatic charge-discharge cycles. A practical demonstration ability to red LED approximately 15 minutes. These results highlight potential utilizing biomass, specifically efficient development.

Language: Английский

Green synthesis of high-quality V₂O₅/single-walled carbon nanotube composites via Trachyspermum Ammi leaf extract: A sustainable approach to sodium-ion battery anodes

Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 120, P. 116505 - 116505

Published: April 6, 2025

Language: Английский