Perovskite oxides as promising candidates for advanced supercapacitor electrode materials: A review

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 640, P. 236760 - 236760

Published: March 13, 2025

Language: Английский

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Three-dimensional reduced graphene oxide support from spheric CaCO3 as sacrificial template applied to in-situ growth of HKUST-1 metal-organic framework

Carbon Trends, Journal Year: 2025, Volume and Issue: unknown, P. 100504 - 100504

Published: April 1, 2025

Language: Английский

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Preparation of Co₃S₄/rGO composites and their supercapacitor performances

Microstructures, Journal Year: 2025, Volume and Issue: 5(3)

Published: April 15, 2025

Graphene, with its two-dimensional structure, offers high mechanical flexibility and excellent conductivity, but tendency to stack aggregate in practical applications reduces the effective surface area, resulting rapid capacity degradation. To overcome this, we situ grow rod-like Co3S4 structures on graphene oxide (rGO), forming a highly conductive mechanically stable composite. The nanoparticles serve as active sites for redox reactions, significantly improving specific capacitance, while rGO matrix enhances electron transport mitigates issues of volume expansion during charge/discharge cycles. Co3S4/rGO composite is synthesized via two-step hydrothermal process, effects sulfuration temperature time electrochemical performance are systematically explored. results show that Co3S4/rGO-160-8 composite, at 160 °C eight hours, achieves capacitance 1442.5 F·g-1 1 A·g-1 exhibits retention 93.3% after 5000 cycles 4 A·g-1. Furthermore, Co3S4/rGO-160-8//activated carbon asymmetric supercapacitor delivers an energy density 47.0 Wh·kg-1 749.8 W·kg-1 power density, only 8.9% loss cycles, demonstrating cycling stability. This novel material promising approach high-performance supercapacitors, balancing rate performance, long-term

Language: Английский

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Unravelling the Role of Synthesis Temperature in δ‐MnO₂ Nanosphere Formation for High‐Performance Supercapacitors

ChemistrySelect, Journal Year: 2025, Volume and Issue: 10(16)

Published: April 1, 2025

Abstract In the present research work, reported a role of controlled temperature for synthesis 2D layered structure δ‐MnO 2 nanospheres, high capacitance, were synthesized using simple, facile hydrothermal method. The taken as 140, 160, and 180 °C. highest specific capacitance 525.93 F g −1 in 1 m Na SO 4 electrolyte 5 mV s scan rate was observed sample prepared at symmetric supercapacitor device fabricated liquid‐state assembly process, with EIS confirmed low charge transfer resistance excellent cycling stability. From XRD studies, that material is crystalline size increases from 10 to 16 nm increases. FESEM nanosphere like morphology, average grain decreases 700 300 EDAX analysis reveals only contains Mn O there no any impurity present. Advantageously, water contact angle electrode hydrophilic nature. Raman FTIR spectroscopy investigated chemical functional groups . oxidation states are analysed XPS.

Language: Английский

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Nitrogen-doped graphene/carbon nanotube hydrogel for high-performance, low-temperature supercapacitor

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

Published: April 22, 2025

Language: Английский

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Sr2FeMoO6 perovskite/Ti3C2 MXene nanostructures toward photo-curable epoxy acrylate coatings with enhanced microwave absorption and thermal properties

Applied Materials Today, Journal Year: 2025, Volume and Issue: 44, P. 102750 - 102750

Published: April 26, 2025

Language: Английский

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Recent Advances in Graphene‐Based Metal Oxide Composites for Supercapacitors: A Comprehensive Review

Advanced Sustainable Systems, Journal Year: 2025, Volume and Issue: unknown

Published: May 3, 2025

Abstract Graphene‐based metal oxide mixtures have emerged as a promising material suitable for high‐performance supercapacitors because of their unique combination high electrical conductivity, large surface area, and excellent electrochemical stability. Integrating oxides, such Manganise dioxide (MnO 2) , Cobalt (Co 3 O 4 ) Nickel (NiO), Ruthenium (RuO 2 etc., with graphene enhances supercapacitor electrodes, specific capacitance, energy density, cycling This review examines the latest progress in synthesis, characterization, performance optimization graphene‐based composites. Various strategies enhancing properties, like controlling morphology, adjusting loading, optimizing hybridization methods, are discussed. Furthermore, graphene's role electron conduction, increasing stability expanding area charge storage is highlighted. The challenges scaling up these materials also addressed provide insights into future directions to enhance supercapacitors, an emphasis on power long‐term offers comprehensive overview state‐of‐the‐art research graphene‐metal composites, goal steering advancement next‐generation devices.

Language: Английский

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Tri-metal centers governed Zn-Co oxide/HfO2@bimetallic Ni-Pd alloy catalyst synthesized herringbone carbon nanofiber for supercapacitor electrode

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 181109 - 181109

Published: May 1, 2025

Language: Английский

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Harnessing potential of microwave-assisted ultrafast synthesis of reduced graphene oxide/Mn3O4 bioactive nanocomposite hydrogel for bone tissue engineering

European Polymer Journal, Journal Year: 2024, Volume and Issue: unknown, P. 113462 - 113462

Published: Sept. 1, 2024

Language: Английский

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Flexible supercapacitors based on in-situ synthesis of composite nickel manganite@reduced graphene oxide nanosheets cathode: An integration of high mechanical flexibility and energy storage

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: unknown, P. 176873 - 176873

Published: Oct. 1, 2024

Language: Английский

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