High-entropy materials for energy-related applications

Fu, Maosen; Ma, Xiaoqian; Zhao, Kangning; Li, Xiao; Su, Dong

doi:10.1016/j.isci.2021.102177

Cited by 183 publications

(102 citation statements)

References 124 publications

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“…High-entropy materials (HEMs) can be regarded as any solid solution materials that are comprised of quasi-equimolar multicomponent [1]. HEMs have a broad range of applications in the field of materials science due to their unique and novel characteristics [2][3][4][5][6]. This class of materials may provide an opportunity for developing advanced and innovative materials, thereby breaking the limitations of traditional materials properties [7,8].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterizations of (Mg, Co, Ni, Cu, Zn)O high-entropy oxides

et al. 2021

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High-temperature structural ceramic materials require stability in terms of thermal and mechanical properties. High entropy oxides (HEOs) are among the emerging novel family of advanced ceramic materials with peculiar functional properties. However, their thermal stabilities and mechanical properties are not well investigated. In this work, HEO systems were synthesized from binary oxides of MgO, CoO, NiO, CuO, and ZnO using solid-state reaction method at high temperature, after obtaining the individual oxides through co-precipitation methods. The phase purity of as-synthesized and sintered samples was characterized using X-ray powder diffraction, while the microstructural investigation was performed using Scanning electron microscopy. Mechanical property of the sintered samples at different sintering times and temperatures was investigated and the sample sintered at a sintering temperature of 1200 °C for 15 h sintering time showed a maximum Vickers hardness of about 16 GPa. This result is comparable with some of the hard ceramic materials, and therefore the materials could be a potential candidate for structural applications.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterizations of (Mg, Co, Ni, Cu, Zn)O high-entropy oxides

et al. 2021

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“…In recent years, more reviews focused on diffusion studies [57], deformation behavior [58,59], corrosion [60,61], fracture and fatigue [62,63], defects and radiation resistance [64][65][66], refractory HEAs [67], HEAs composites [68] and ceramics [69] were published. Moreover, high entropy alloys have applications in different fields such as biomedical [70,71], energy [72], wear [73,74], nuclear [75,76] and creep [63], corrosion [60,[77][78][79].…”

Section: Introduction 1the History Of High Entropy Alloysmentioning

confidence: 99%

Recent Advances in Additive Manufacturing of High Entropy Alloys and Their Nuclear and Wear-Resistant Applications

Sonal

Lee

2021

Metals

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Alloying has been very common practice in materials engineering to fabricate metals of desirable properties for specific applications. Traditionally, a small amount of the desired material is added to the principal metal. However, a new alloying technique emerged in 2004 with the concept of adding several principal elements in or near equi-atomic concentrations. These are popularly known as high entropy alloys (HEAs) which can have a wide composition range. A vast area of this composition range is still unexplored. The HEAs research community is still trying to identify and characterize the behaviors of these alloys under different scenarios to develop high-performance materials with desired properties and make the next class of advanced materials. Over the years, understanding of the thermodynamics theories, phase stability and manufacturing methods of HEAs has improved. Moreover, HEAs have also shown retention of strength and relevant properties under extreme tribological conditions and radiation. Recent progresses in these fields are surveyed and discussed in this review with a focus on HEAs for use under extreme environments (i.e., wear and irradiation) and their fabrication using additive manufacturing.

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“…In general, high-entropy materials (HEMs) are defined as solid-solution materials that consist of quasi-equimolar multi component (typically five or more). [32] However, these…”

mentioning

confidence: 99%

“…In general, high-entropy materials (HEMs) are defined as solid-solution materials that consist of quasi-equimolar multi component (typically five or more). [32] However, theseThe high-entropy materials have raised much attention in recent years due to their extraordinary performances in mechanical, catalysis, energy storage fields. Herein, a new type of high-entropy hydroxides (e.g., NiFeCoMnAl(OH) x ) that are amorphous and capable of broad solar absorption is reported.…”

mentioning

confidence: 99%

Amorphous High‐Entropy Hydroxides of Tunable Wide Solar Absorption for Solar Water Evaporation

Bao

Wang

Lyu

et al. 2021

Part & Part Syst Charact

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water purification has become an urgent task to alleviate this crisis. Solar water evaporation (SWE) is regarded as one of the most promising and clean methods for realizing industrial-grade water purification. [4,5] Several effective SWE material systems have been reported in previous research, including carbon materials, [6][7][8] noble metal nanoparticles, [9][10][11] hydrogel materials, [12][13][14] and semiconducting photothermal materials. [15][16][17][18][19][20] Among them, semiconducting photothermal materials with broad solar absorption, such as the black oxides (e.g., black titanium dioxides [15][16][17][18][19][20] ) and transition metal sulfides, [21][22][23] are particularly attractive for efficiently harvesting and using the solar energy. However, the current techniques of these materials generally exhibit major disadvantages, e.g., photo-degradation, instability, environmental hazards, high cost, or tedious fabrication methods. For example, black TiO 2 materials are generally fabricated using complex and costly reduction methods (e.g., heated at high temperature in pure H 2 or with Mg or Al powders) [24,25] and are vulnerable to chemical instability and photobleaching.Bandgap engineering of semiconductors to achieve abroad solar-spectrum absorption is heavily investigated for wideranging functionalities. Traditional strategies involve high-temperature vapor deposition of multiple compounds of similar lattice structures. [26,27] Other common methods include chemical reduction, doping, or lattice straining. [28,29] However, these methods are limited by the following difficulties: 1) complex and difficult synthetic routes of low production rates and small sample sizes, 2) restricted to specific material systems, 3) small tunable range of bandgap refraining functionalities particularly for achieving wide solar absorption. Therefore, these methods are not applicable for synthesizing massive photothermal materials for SWE. Encouragingly, two recent studies reported that high-entropy design can achieve bandgap reduction by overlapping the electron orbitals of multiple cations: the rare earthbased oxide, (Ce,Gd,La,Nd,Pr,Sm,Y)O 2−δ , displayed a narrowed bandgap (from ≈3 eV of CeO 2 down to ≈2 eV) [30] ; the other transition metal-based oxide, TiZrHfNbTaO 11 , possessed a main bandgap of 2.9 eV (smaller than that of any monoxides). [31] The high-entropy strategy provides a new insight for bandgap engineering. In general, high-entropy materials (HEMs) are defined as solid-solution materials that consist of quasi-equimolar multi component (typically five or more). [32] However, theseThe high-entropy materials have raised much attention in recent years due to their extraordinary performances in mechanical, catalysis, energy storage fields. Herein, a new type of high-entropy hydroxides (e.g., NiFeCoMnAl(OH) x ) that are amorphous and capable of broad solar absorption is reported. A facile one-pot co-precipitation method is employed to synthesize these amorphous high-entropy hydroxides (a-HEHOs) under ambient c...

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High-entropy materials for energy-related applications

Cited by 183 publications

References 124 publications

Synthesis and characterizations of (Mg, Co, Ni, Cu, Zn)O high-entropy oxides

Synthesis and characterizations of (Mg, Co, Ni, Cu, Zn)O high-entropy oxides

Recent Advances in Additive Manufacturing of High Entropy Alloys and Their Nuclear and Wear-Resistant Applications

Amorphous High‐Entropy Hydroxides of Tunable Wide Solar Absorption for Solar Water Evaporation

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