Synthesis of the ZnCo₂O₄ Positive Electrode Using a Urea-Assisted Hydrothermal Approach for Supercapacitor Applications

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

Published: Jan. 22, 2025

Spinel-structured oxides are cost-effective and environmentally friendly, making them attractive candidates for supercapacitor electrode applications. However, their limited electrical conductivity low energy density hinder widespread utilization. In this study, ZnCo2O4 nanomaterials were synthesized using a simple hydrothermal method, followed by calcination process with controlled urea molar concentration. The resulting samples exhibited significant specific surface area, which reduced the widths of ion diffusion channels while simultaneously increasing number active sites. At current 7 mA/cm2, nanoparticles 0.9 M concentration demonstrated remarkable capacitance 635 F/g. Furthermore, performance evaluation revealed an 31.9 W h/kg power 143.7 W/kg. its assembled configuration, asymmetric 9.29 at 426 device excellent cyclic stability, maintaining 78% after 10,000 cycles. These findings suggest that could be viable option various portable storage

Language: Английский

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Recent progress in biocompatible miniature supercapacitors

Energy Materials, Journal Year: 2025, Volume and Issue: 5(7)

Published: March 10, 2025

With the advancement of wearable and implantable health medical electronics, biocompatible miniature energy storage devices were developed rapidly. In particular, supercapacitors (BMSCs) have advantages conventional supercapacitors, such as high-power density, fast charging/discharging rate, long operating lifetime, well strong selectivity materials. They are expected to play an important role in personalized electronic integration systems. Biocompatibility involves biosafety materials relates mechanics geometrical forms. For example, BMSCs should be thin compact, ensuring ease portability comfort for users. also flexible stretchable conform skin or tissue, providing stable power electronics even under deformation. Furthermore, biodegradability/ bioabsorbability ensures they both body- environment-friendly. This review summarizes recent research progress devices, including basic requirements selection components. Additionally, advanced applications multifunctional systems real-time monitoring treatment introduced, along with associated challenges prospects.

Language: Английский

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High-Performance Supercapacitor Electrode Materials: Cu/MnXx (X = O, S, C)-rGO Nanocomposites Derived from CuMn-BTC Metal–Organic Framework

Journal of Electronic Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 9, 2025

Language: Английский

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Layer‐By‐Layer Approach to Improve the Capacitance of Conducting Polymer Films

Advanced Electronic Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 15, 2025

Abstract In the pursuit of energy storage devices offering high power density, rapid charge and discharge rates, a layer‐by‐layer deposition approach is shown to improve capacitive properties conducting polymer‐based devices. This work describes synthesis characterization composite material based on poly(3,4‐ethylenedioxythiophene) (PEDOT) poly(3,4‐ethylenedioxypyrrole) (PEDOP) for supercapacitor applications. PEDOT PEDOP are sequentially electropolymerized using cyclic voltammetry form bilayer structures, overcoming challenges associated with copolymerization. The evaluation electrochemical performance PEDOT/PEDOP reveals superior areal capacitance (42.2 ± 2.8 mF cm −2 at scan rate 5 mV s −1 ) outperforming both homopolymers by up 30%. Microscopic spectroscopic surface analysis confirm uniform coating enhanced roughness resulting from formation 3D nanostructures, contributing improved performance. Further impedance demonstrates low transfer resistance (25 8 Ω) density respect area electrode (3.53 0.3 µWh 55 µW ), making promising high‐performance supercapacitors.

Language: Английский

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Mechanistic insights into electric fish-inspired power sources: A combined modeling and experimental approach

Electrochimica Acta, Journal Year: 2025, Volume and Issue: unknown, P. 146043 - 146043

Published: March 1, 2025

Language: Английский

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Advances in Electrode and Electrolyte Materials of Fiber-shaped Supercapacitors for Electrochemical Performance Improvement and Applications Extension

Energy storage materials, Journal Year: 2025, Volume and Issue: unknown, P. 104222 - 104222

Published: March 1, 2025

Language: Английский

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Heparin Doped Polyaniline for Anticoagulation Supercapacitors

Advanced Healthcare Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 9, 2025

Abstract With the rapid development of implantable electronic medical devices, supercapacitors have gained significant attention as energy storage devices due to their inherent advantages. However, these inevitably direct contact with blood and trigger coagulation or thrombus formation when implanted in body. In severe cases, negative effects compromise functionality system even jeopardize human health. Herein, a biocompatible electrode material high anticoagulant activity is designed by doping polyaniline macromolecule heparin under neutral conditions, which macromolecules dopants conditions not only avoids toxicity acids biological tissues de‐doping caused small molecules, but also imparts properties material. Based on situ polymerization approach, an all‐in‐one anticoagulation supercapacitor employed manufacture exhibits good electrochemical performance (energy density 18.89 µWh cm −2 power 197.8 µW ), cycling stability (capacitance retention 70.23% after 2, 000 cycles), (APTT 15.47 s, PT 16.57 TT 49.47 FIB 1.12 g L −1 tissue compatibility. The strategy provides valuable reference for supply bioelectronics.

Language: Английский

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Comparative transition molybdates (XMoO4 (X = Co, Mn, Ni, and Zn)) for high-performance supercapacitors

Inorganic Chemistry Communications, Journal Year: 2025, Volume and Issue: unknown, P. 114514 - 114514

Published: April 1, 2025

Language: Английский

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Harnessing Nanofibers for Next-Generation Energy Applications

IGI Global eBooks, Journal Year: 2025, Volume and Issue: unknown, P. 109 - 136

Published: April 11, 2025

Nanofibers, with their high surface area, tunable porosity, and superior mechanical electrical properties, are transforming energy technologies. This review explores role in storage conversion, highlighting applications batteries, where they enhance ion transport, capacity, cycling stability, supercapacitors, improving charge power density. In fuel cells, nanofibers act as catalysts membranes, boosting electrochemical efficiency, while hydrogen storage, enable adsorption desorption. Their integration solar cells thermoelectric systems enhances light absorption thermal conversion. Fabrication techniques like electrospinning self-assembly discussed, alongside challenges scalability, commercialization. With continued innovations, hold immense promise for next-generation sustainable systems.

Language: Английский

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Crystal‐Tuned Spinel Copper Cobaltite with Vertically Aligned Nanoribbons for High‐Performance Asymmetric Coin Cells Evaluated through Experimental and Theoretical Investigations

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

Abstract The development of sustainable, high‐performance electrode materials is essential for the future energy storage technologies such as supercapacitors (SCs) and batteries. 1D nanoribbons with unique fascinating properties are expected to revolutionize technologies. Herein, chemically tuned CuCo 2 O 4 (CNRs) outperform their counterparts (Co 3 Cu O) in SCs due high surface area, providing multiple active sites ion adsorption redox reactions. used nickel foam ensures a reliable electrical connection CNRs provides 3D‐conductive channels rapid transport synergistic effects. optimized CNR exhibits an impressive capacitance 1 126 F g −1 at mA cm −2 , retaining ≈93.51% its after 50 000 cycles. asymmetric coin cell SC device (CNRs//activated carbon (AC)) reveals exceptional density (ED) power (PD) values 32.2 W h kg 517 respectively. Furthermore, functional theory (DFT) based on first‐principle evaluations clarifies that diverse unbroken enhanced metallic nature. These results establish highly promising candidates next‐generation sustainable devices.

Language: Английский

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