Elevating Waste Biomass: Supercapacitor Electrode Materials Derived from Spent Coffee Grounds

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 3, 2025

Waste biomass, such as spent coffee grounds (SCG), presents an abundant and sustainable source of carbon for energy storage other applications. In this study, ultrahigh surface area was synthesized from evaluated electrode material supercapacitors. Using alkali activation process with potassium hydroxide (KOH), the produced nanoporous exhibited BET (∼3600 m2/g) a large pore volume (1.80 cm3 g–1), 95% presence micropores. These structural characteristics significantly enhanced electrochemical performance material, making it suitable use in devices. Electron spin resonance (ESR) measurements were conducted to quantify number radicals, aiming shed light on mechanism behind formation high carbons. The activated tested two-electrode supercapacitor setup ionic liquid electrolyte, demonstrating excellent capacitive properties. It achieved specific capacitances 131 96 F g–1 at 0.5 4 A g–1, respectively. Furthermore, gravimetric density 52 W h kg–1 power 871 1 outperforming commercially available carbons SBET ∼2500 m2/g. testing showed stable across wide voltage window up 3.5 V, minimal pseudocapacitive behavior, confirming its suitability supercapacitors demands. This work underscores potential converting waste biomass into high-performance materials, offering environmentally friendly cost-effective solution. results highlight advantages using grounds-derived supercapacitors, opening pathways further development materials

Language: Английский

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Engineering biomass-derived hard carbon for secondary batteries and supercapacitors. Are we there yet? A comprehensive review

Biomass and Bioenergy, Journal Year: 2025, Volume and Issue: 198, P. 107844 - 107844

Published: April 10, 2025

Language: Английский

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Pore Engineering in Biomass-Derived Carbon Materials for Enhanced Energy, Catalysis, and Environmental Applications

Molecules, Journal Year: 2024, Volume and Issue: 29(21), P. 5172 - 5172

Published: Oct. 31, 2024

Biomass-derived carbon materials (BDCs) are highly regarded for their renewability, environmental friendliness, and broad potential application. A significant advantage of these lies in the high degree customization physical chemical properties, especially terms pore structure. Pore engineering is a key strategy to enhance performance BDCs critical areas, such as energy storage, catalysis, remediation. This review focuses on engineering, exploring definition, classification, adjustment techniques structures, well how factors affect application energy, Our aim provide solid theoretical foundation practical guidance facilitate rapid transition from laboratory industrial applications.

Language: Английский

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Development of Novel Mussel-Shell-Derived CaO-Based Transition Metal Catalysts for Efficient Microwave-Assisted Biodiesel Production

Processes, Journal Year: 2025, Volume and Issue: 13(2), P. 522 - 522

Published: Feb. 13, 2025

This study introduces an innovative way to use calcium oxide (CaO) derived from mussel shells as a catalyst support for biodiesel production. Several transition metals, including Ni, Ag, Mo, Co, and W were loaded on the aforementioned synthesize mono-metallic bi-metallic catalysts using wet impregnation method. Microwave technology was utilized accelerate reactions improve efficiency. Characterization techniques such BET, SEM/EDX, XRD confirmed successful incorporation of metals into structure. The prepared catalysts, Mussel(Ni), Mussel(Ni-W), Mussel(Ni-Ag), Mussel(Ni-Mo), Mussel(Ni-Co), evaluated investigate catalytic performance production corn oil under different conditions microwave powers, loadings, reaction times, methanol-to-oil ratios. combination mussel-derived with resulted in reduced times 100% selectivity 1.5% loading, 10 min time, ratio 15:1, showcasing synergistic effects metals. highlights potential mussel-shell-derived cost-effective sustainable solution By reducing reliance conventional methods, these findings contribute clean energy advancements offer scalable, environmentally friendly pathway renewable fuel synthesis.

Language: Английский

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Enhancing supercapacitor performance: evaluating the impact of binder type and mass loading on charge storage mechanisms

Ionics, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Language: Английский

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Nature’s blueprint for energy: biomass-derived heteroatom-doped graphene materials for advanced energy applications

Carbon letters, Journal Year: 2025, Volume and Issue: unknown

Published: March 21, 2025

Language: Английский

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Synthesis of High-Performance Supercapacitors from Red Calliandra Activated by Single-Step Superheated Steam

Published: Jan. 1, 2024

Language: Английский

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