Recent trends in hierarchical electrode materials in supercapacitor: Synthesis, electrochemical measurements, performance and their charge-storage mechanism

Journal of Energy Storage, Год журнала: 2024, Номер 94, С. 112454 - 112454

Опубликована: Июнь 13, 2024

Язык: Английский

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A tremella-like in situ synthesis of ZIF-67Co(OH)F@Co₃O₄ on carbon cloth as an electrode material for supercapacitors

RSC Advances, Год журнала: 2024, Номер 14(38), С. 27831 - 27842

Опубликована: Янв. 1, 2024

In this study, a simple in situ technique followed by hydrothermal method is used to synthesize novel tremella-like structure of ZIF-67Co(OH)F@Co 3 O 4 /CC metal–organic framework (MOF) derived from zeolite imidazole.

Язык: Английский

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Electrochemical Performance of Guanidinium Salt-Added PVP/PEO Solid Polymer Electrolyte with Superior Power Density

Polymers, Год журнала: 2025, Номер 17(2), С. 206 - 206

Опубликована: Янв. 15, 2025

Solid polymer electrolytes (SPEs) for symmetrical supercapacitors are proposed herein with activated carbon as electrodes and optimized solid electrolyte membranes, which serve the separators electrolytes. We propose design of a low-cost consisting guanidinium nitrate (GuN) poly(ethylene oxide) (PEO) poly(vinylpyrrolidone) (PVP). Using solution casting approach, blended varying GuN weight percentage ratios PVP PEO prepared. On electrolytes, structural, morphological, vibrational, ionic conductivity investigated. The electrolytes’ morphology level roughness examined using an FESEM. interlinking bond formation between polymers salt is verified by FTIR measurements, indicating that ligands chemically complex. found that, up to 20 wt.% GuN, value increased (1.84 × 10−6 S/cm) increase in mobile charge carriers. Notably, PVP/PEO/20 was fabricated into solid-state supercapacitor device, delivered potential window 0 2 V, superior energy density 3.88 Wh kg−1, power 1132 W kg−1.

Язык: Английский

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Effect of activated carbon@nickel fluoride prepared by nickel impregnation and NF3 fluorination on the electrochemical performance of hybrid supercapacitors

Colloids and Surfaces A Physicochemical and Engineering Aspects, Год журнала: 2025, Номер unknown, С. 136536 - 136536

Опубликована: Фев. 1, 2025

Язык: Английский

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Enhanced capacitive performance in hybrid supercapacitors via synergistic co(OH)2/Ni2Co(PO4)2 composite nanomaterials

Inorganica Chimica Acta, Год журнала: 2025, Номер unknown, С. 122681 - 122681

Опубликована: Март 1, 2025

Язык: Английский

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Rapid electro-synthesis of Ni(OH)₂ polymorphs with alpha to beta phase transition for high-energy-density aqueous hybrid supercapacitor

Journal of Energy Storage, Год журнала: 2025, Номер 126, С. 117049 - 117049

Опубликована: Май 16, 2025

Язык: Английский

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Electropolymerization of an Ultra-thin Film on bimetallic nanocomposite: enhanced performance, perfect stability for supercapacitors

Materials Research Bulletin, Год журнала: 2024, Номер unknown, С. 113211 - 113211

Опубликована: Ноя. 1, 2024

Язык: Английский

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Probing structural, surface morphological, optical, low temperature magnetic studies and electrochemical studies on gadolinium tellurite (GdTeO₃)

Zeitschrift für Physikalische Chemie, Год журнала: 2024, Номер unknown

Опубликована: Дек. 5, 2024

Abstract Gadolinium tellurite (GdTeO 3 ) has been synthesized by hydrothermal process. It displays both tiny nanorods and spherical particles embedded in a structure resembling flakes. Using particle size analyzer, the of is found to be 142.5 nm. GdTeO cubic structure. Urbach energy 0.4566 eV, gap 5.797 refractive index 1.890. The sample suitable as UV filter an effective applicant optoelectronics. bands observed spectrum are assigned with transitions between levels Gd attributed different surface defects. seen linked Gd’s level have various imperfections. contained oxide matrix containing gadolinium. Magnetic analysis indicates that may undergoing phase transition contain small impurity. At 300 K, M−H curve demonstrates paramagnetic weak ferromagnetic characteristics aligned cooperative spins. Pseudocapacitive behavior shown cyclic voltammogram Cp analysis. exhibits 0.90 V potential window. specific capacitance 139.34 Fg −1 from 112.93 Analysis impedance reveals pseudo-capacitive character.

Язык: Английский

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Enhancing the electrochemical performance of Ni-doped CuCo₂O₄ electrode material through 2D layered sheets

Zeitschrift für Physikalische Chemie, Год журнала: 2024, Номер unknown

Опубликована: Сен. 16, 2024

Abstract In the present study, structural and electrochemical properties on Ni–CuCo 2 O 4 (0 ≤ x 10 %) was studied for use of active electrode materials in asymmetric supercapacitors prepared by a simple hydrothermal process. The synthesized material’s morphology shows that nanosheets are assembled with an average diameter about 50 nm, X-ray diffraction results show spinel cubic structure space group Fd-3mz (No. 227). CuCo electrodes exhibit high specific capacitance because abundant redox reactions Co 2+ /Co 3+ 4+ , Ni at site has displayed exceptional charge-discharge cyclic stability properties. studies doped highest pseudocapacitive nature, ultra-specific capacitances 803 F g −1 889 924 1,086 1 A respectively pure, 2, 6, % electrodes. Further, excellent rate capability 82 retention 92.3 Coulombic efficiency were realized after 1,000 cycles. Moreover, M-H study room temperature showed paramagnetic behaviour. Additionally, magnetic characteristics system is expected to improve as doping quantity increased. This may pave way enhanced futuristic hybrid devices applications.

Язык: Английский

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ZIF-67 derived N doped carbon embedded Co_xP for superior hydrogen evolution

Zeitschrift für Physikalische Chemie, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 9, 2024

Abstract Developing a sustainable non-noble hybrid electrocatalyst for effective electrocatalysis is the most crucial task; particularly in hydrogen energy production realm of conversion. In this work, thermal pyrolysis process followed by phosphorization strategy was employed to prepare and fabricate ZIF-67 (Zeolitic imidazole) assisted Co 2 P/N doped carbon evolution reaction (HER). The optimized P/N–C exhibited hollow porous nanostructures as confirmed from scanning electron microscopy. achieved nanostructure improved efficiency charge mass transportation which BET analysis, has high surface area value 94.731 m /g. addition, transition metal atom can regulate reactants adsorption desorption capacity modulating P electronic configuration. electrochemical studies fabricated derived electrode were analyzed using 1.0 M alkaline potassium hydroxide (KOH) medium 3 system process. Whilst, optimizing temperature during will remarkably enhance favourable characteristics generation. Notably, P/NC at 350 °C low overpotential (135 mV) minimum 10 mA/cm 120.3 mV/dec Tafel slope. Besides, stability current density verified chronoamperometry test. Hence, study furnishes potential technique development advanced MOF successful alternative on large scale.

Язык: Английский

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