Impressive high-temperature oxidation resistance of FeCrNiMnAl high entropy alloy coating on the ferritic/martensitic steel with primordial Al2O3 and Mn3O4 gradient films

He, Mingyu; Kang, Hongjun; Lin, Shouyuan; Liu, Yanyan; Zhang, Peng; Wei, Qin; Wu, Xiaohong

doi:10.1016/j.jallcom.2022.167109

Cited by 13 publications

(2 citation statements)

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“…In this case, it is likely that the larger particles were covered with this passive oxide layer, while the core of the particles remained metallic. However, a phase transformation of the metallic phase occurred from Im-3m to Fm-3m, similar to the transformation observed in [36][37][38][39][40]. According to [41], Fe, Co, and Ni possess high electronic conductivity in lithium-ion batteries, which makes them valuable for enhancing the electrical conductivity of materials with poor conductivity.…”

Section: Materials Characterizationsupporting

confidence: 56%

“…The metallic content, determined by Rietveld refinement with Rwp = 1.28%, was approximately 9.8 wt.%. This can be attributed to the oxidation resistance of specific elements such as Cr and Al, which can form a passive oxide layer on the surface of the particles, hindering further oxidation [36][37][38][39][40]. In this case, it is likely that the larger particles were covered with this passive oxide layer, while the core of the particles remained metallic.…”

Section: Materials Characterizationmentioning

confidence: 99%

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High-Entropy Composite Coating Based on AlCrFeCoNi as an Anode Material for Li-Ion Batteries

et al. 2023

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In this study, a high entropy composite coating was synthesized by oxidizing a high entropy alloy, AlCrFeCoNi, at elevated temperatures in a pure oxygen atmosphere. X-Ray diffraction (XRD) analysis revealed that the prepared material was a dual-phase composite material consisting of a spinel-structured high entropy oxide and a metallic phase with a face-centered cubic structure. The metallic phase can improve the electrical conductivity of the oxide phase, resulting in improved electrochemical performance. Scanning electron microscopy with energy dispersive spectroscopy (SEM/EDS) analysis unveiled the compositional homogeneity of the composite material. The prepared material was utilized as an anode active material in lithium-ion batteries. Cyclic voltammetry (CV) revealed the oxidation and reduction regions, while the electrochemical impedance spectroscopy (EIS) measurements showed a decrease in the charge transfer resistance during the cycling process. A long-term rate capability test was conducted at various current densities: 100, 200, 500, 1000, and 2000 mA g−1. During this test, a notable phenomenon was observed in the regeneration process, where the capacity approached the initial discharge capacity. Remarkably, a high regeneration efficiency of 98% was achieved compared with the initial discharge capacity. This phenomenon is typically observed in composite nanomaterials. At a medium current density of 500 mA g−1, an incredible discharge capacity of 543 mAh g−1 was obtained after 1000 cycles. Based on the results, the prepared material shows great potential for use as an anode active material in lithium-ion batteries.

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