Effect of Si Content on Phase Structure, Microstructure, and Corrosion Resistance of FeCrNiAl0.7Cu0.3Six High-Entropy Alloys in 3.5% NaCl Solution

Coatings, Journal Year: 2025, Volume and Issue: 15(3), P. 342 - 342

Published: March 15, 2025

This study examines the microstructure and corrosion resistance of FeCrNiAl0.7Cu0.3Six (x = 0, 0.1, 0.3, 0.5) high-entropy alloys (HEAs) in a 3.5% NaCl solution. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), electrochemical testing were employed to systematically analyze alloys’ microstructures behavior. The XRD results indicate that addition Si affects phase structure alloy. At alloy exhibits single BCC phase. By increasing content 0.1 BCC2 appears. 0.5, Si-containing intermetallic compounds form. SEM observations reveal as increases, develops distinct dendritic structure. Polarization tests solution show current density first decreases then increases with content. contents densities are 4.275 × 10−6 A·cm−2, 4.841 10−7 2.137 respectively. FeCrNiAl0.7Cu0.3S0.3 HEA lowest density, indicating lower rate. Electrochemical impedance (EIS) at has largest capacitive arc radius. charge-transfer (RCT) for 0.5 2.532 105 Ω·cm2, 4.088 4.484 2.083 FeCrNiAl0.7Cu0.3Si0.3 highest RCT, which indicates more stable passivation film better chloride ion intrusion. morphology observed after polarization shows all exhibit intergranular characteristics. alters distribution film-forming elements, Cr Ni. Compared other alloys, is complete. Combining polarization, EIS, results, it can be concluded best

Language: Английский

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Achieving high entropy in rare earth oxides: A detailed experimental procedure

Journal of Rare Earths, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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Hollow Multishelled High Entropy Oxide with Inert Aluminum Stabilizer for Boosted Electrochemical Lithium Storage

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

Published: March 16, 2025

Abstract High entropy oxides (HEOs) have gained increasing attention as lithium‐ion battery anodes, owing to their multi‐principal synergistic effect and structural stability. However, the conversion type HEOs also suffer from low intrinsic conductivity, volume expansion, slow kinetics traditional metal oxide. Herein, a (FeCoNiCrMn) 2 O 3 HEO with hollow multishelled structure Al‐doping (Al‐HEO‐HoMS) is successfully prepared by thermal diffusion‐assisted template method. The effectively accommodates changes mitigates strains, resulting in excellent electrochemical Most importantly, inserted Al dopant Al‐HEO‐HoMS serves pegging points, securely fastening other metallic elements Al─O bonds maintain stability of anodes during repeated lithiation/delithiation. Additionally, abundant oxygen vacancies optimized electronic brought doping been validated accelerate lithiation kinetics. Consequently, anode exhibits high reversible capacity 1540 mAh g −1 after 500 cycles at 1 A . combination inert regulation expected alleviate expansion problem, offering universal strategy for designing advanced batteries.

Language: Английский

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Data-driven discovery of vanadium-based anode materials for lithium-ion batteries

Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 118, P. 116290 - 116290

Published: March 20, 2025

Language: Английский

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Presodiation technology: progress, strategy and prospects of sacrificial cathode additives in sodium-based energy storage systems

Chemical Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

The sacrificial cathode additive (SCA) method holds great promise for industrial application. This review explores recent progress in SCA presodiation technology, with a focus on optimizing strategies to develop near-ideal SCAs.

Language: Английский

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High entropy materials as electrode materials for supercapacitors: A review

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 180153 - 180153

Published: March 1, 2025

Language: Английский

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High entropy nanomaterials for zero-emission energy systems: advanced structural design, catalytic performance and functional mechanisms

Journal of Energy Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

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Preparation of high-performance asymmetric supercapacitor self-supported electrodes with (NiCoCuCrMn)Se cathode and FeSe2 anode by microwave method

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 1010, P. 178073 - 178073

Published: Dec. 12, 2024

Language: Английский

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