Corrosion-Resistant Coating Based on High-Entropy Alloys

Metals, Journal Year: 2023, Volume and Issue: 13(2), P. 205 - 205

Published: Jan. 20, 2023

Metal corrosion leads to serious resource waste and economic losses, in severe cases, it can result catastrophic safety incidents. As a result, proper coatings are often employed separate metal alloys from the ambient environment thus prevent or at least slow down corrosion. Among various materials, high-entropy alloy (HEA coating) have recently received lot of attention due their unique entropy-stabilized structure, superior physical chemical properties, excellent resistance. To address recent developments remaining issues HEA coatings, this paper reviews primary fabrication methods elemental compositions highlights effects on resistance properties. It is found that FeCoCrNi-based refractory prepared by laser/plasma cladding method typically show better also briefly discusses future directions toward high-performing corrosion-resistant based design.

Language: Английский

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Nonprecious High‐Entropy Chalcogenide Glasses‐Based Electrocatalysts for Efficient and Stable Acidic Oxygen Evolution Reaction in Proton Exchange Membrane Water Electrolysis

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(35)

Published: July 17, 2023

Abstract Here,nonprecious high‐entropy chalcogenide glasses (N‐HECGs) consisting of Co, Fe, Ni, Mo, W, and Te are demonstrated in a first demonstration acidic oxygen evolution reaction (OER). N‐HECGs electrocatalysts with high activity stability synthesized using hierarchical hybrid approach based on combination electrochemical deposition tellurization process. The as‐prepared CoFeNiMoWTe exhibit an amorphous, porous structure arrayed nanosheets abundant active sites the increased valence states metal cations due to incorporated non‐metallic Te, enabling enhancement glass forming ability elements. Thanks their unique geometrical chemical structure, as well configuration entropy nature corrosion‐resistance ability, resultant excellent OER catalytic performance superior overpotential 373 mV outstanding 100 h at current density 10 mA cm −2 0.5 m H 2 SO 4 . Moreover, CoFeNiMoWTe‐based proton exchange membrane water electrolyzer is require cell voltage 1.81 V 70 °C obtain practically 1 A , exhibits remarkably long‐term for small potential degradation only 30 mV.

Language: Английский

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Targeted regeneration and upcycling of spent graphite by defect‐driven tin nucleation

Carbon Energy, Journal Year: 2023, Volume and Issue: 6(4)

Published: Aug. 8, 2023

Abstract The recycling of spent batteries has become increasingly important owing to their wide applications, abundant raw material supply, and sustainable development. Compared with the degraded cathode, anode graphite often a relatively intact structure few defects after long cycling. Yet, most is simply burned or discarded due its limited value inferior performance on using conventional methods that are complex, have low efficiency, fail in restoration. Herein, we propose fast, efficient, “intelligent” strategy regenerate upcycle based defect‐driven targeted remediation. Using Sn as nanoscale healant, used rapid heating (~50 ms) enable dynamic droplets automatically nucleate around surface upon cooling strong binding (~5.84 eV/atom), thus simultaneously achieving dispersion As result, regenerated showed enhanced capacity cycle stability (458.9 mAh g −1 at 0.2 A 100 cycles), superior those commercial graphite. Benefiting from self‐adaption dispersion, different degrees can be similar structures performance. EverBatt analysis indicates regeneration upcycling significantly lower energy consumption (~99% reduction) near‐zero CO 2 emission, yield much higher profit than hydrometallurgy, which opens new avenue for direct spend an green, profitable manner battery manufacture.

Language: Английский

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The understanding, rational design, and application of high-entropy alloys as excellent electrocatalysts: A review

Science China Materials, Journal Year: 2023, Volume and Issue: 66(7), P. 2527 - 2544

Published: May 18, 2023

Language: Английский

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Progress in electrocatalytic hydrogen evolution of transition metal alloys: synthesis, structure, and mechanism analysis

Nanoscale, Journal Year: 2023, Volume and Issue: 15(16), P. 7202 - 7226

Published: Jan. 1, 2023

The optimization strategies of transition metal binary, ternary, and high-entropy alloys applied to HER, including composition regulation, hybrid engineering, phase morphological engineering were emphatically discussed.

Language: Английский

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