Efficient solar energy harvesting enabled by high-entropy ceramic nanofilms through a co-sputtering method

He, Cheng‐Yu; Zhao, Peng; Gao, Xiang‐Hu; Liu, Gang; La, Peiqing

doi:10.1016/j.jallcom.2022.167899

Cited by 5 publications

(3 citation statements)

References 51 publications

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“…As a result, the IR radiation performance of MCFCCO in the 0.78−14 μm wave band remains stable, with only a slight decrease by 2.1% observed after annealing at 1300 °C for 100 h (Figure 3e,f). The slight change should be ascribed to the increased grain sizes, [61,62] as shown in Figures S17 and S18 and Table S5 (Supporting Information). The entropy-stabilized effect is responsible for the high-temperature robustness of the material, which overcomes the effect of enthalpy gain and leads to a decrease in Gibbs free energy.…”

Section: Ir Radiation Performance and Thermal Stabilitymentioning

confidence: 97%

High‐Entropy Engineering for Broadband Infrared Radiation

Wang

Liu

et al. 2023

Adv Funct Materials

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Developing high‐performance infrared (IR) radiation materials with desired broadband emissivity, excellent thermal stability, and scalable fabrication processes is highly desirable for energy‐saving applications and heat dissipation. However, it remains a grand challenge to concurrently meet these requirements in existing IR radiation materials. Herein, a high‐entropy (HE) approach is employed to advance the IR radiation performance of spinel oxide. This strategy efficiently narrows the bandgap due to the enhanced electron transitions and the introduction of oxygen vacancies (Ov), variable‐valence behavior, and orbital hybridization. In addition, the lattice distortion effect lowers the symmetry of lattice vibration. Therefore, the resulting HE spinel oxide exhibits near‐blackbody radiation performance, with its emissivity approximately three times higher than that of the binary spinel oxide. Moreover, the entropy‐dominating phase stabilization effect contributes to impressive thermal stability (stable at 1300 °C for 100 h). This makes it suitable for high‐temperature thermal radiation applications, such as energy conservation in industrial high‐temperature furnaces. More importantly, the HE spinel oxide can be readily spray‐coated on various substrates. And the coating on stainless steel reaches an outstanding emissivity of 0.943 in the 0.78−16 µm wavelength range. All these merits render the HE approach competitive for the development of high‐emissivity and thermally stable thermal radiation materials.

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Section: Ir Radiation Performance and Thermal Stabilitymentioning

confidence: 97%

High‐Entropy Engineering for Broadband Infrared Radiation

Wang

Liu

et al. 2023

Adv Funct Materials

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“…By cosputtering ZrNbMo and Cr targets, an absorber with a significant solar absorptance of 96.3%, a reduced emittance of 18.8% at 400 °C, and an angle-insensitive absorption ability was produced. [144] Dielectric constant calculations indicate a high imaginary part of HMVF layer across a wide spectrum, indicative of a superior photon trapping capability. Subsequent research replacing Cr with either Al or W still achieved highperformance spectrally selective absorbers.…”

Section: He Material-based Spectrally Selective Absorbersmentioning

confidence: 98%

High‐Entropy Photothermal Materials

He,

Li,

Zhou

et al. 2024

Advanced Materials

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High‐entropy (HE) materials, celebrated for their extraordinary chemical and physical properties, have garnered increasing attention for their broad applications across diverse disciplines. The expansive compositional range of these materials allows for nuanced tuning of their properties and innovative structural designs. Recent advances have been centered on their versatile photothermal conversion capabilities, effective across the full solar spectrum (300‐2500 nm). The HE effect, coupled with hysteresis diffusion, imparts these materials with desirable thermal and chemical stability. These attributes position HE materials as a revolutionary alternative to traditional photothermal materials, signifying a transformative shift in photothermal technology. This review delivers a comprehensive summary of the current state of knowledge regarding HE photothermal materials, emphasizing the intricate relationship between their compositions, structures, light‐absorbing mechanisms, and optical properties. Furthermore, the review outlines the notable advances in HE photothermal materials, emphasizing their contributions to areas such as solar water evaporation, personal thermal management, solar thermoelectric generation, catalysis, and biomedical applications. The review culminates in presenting a roadmap that outlines prospective directions for future research in this burgeoning field, and also outlines fruitful ways to develop advanced HE photothermal materials and to expand their promising applications.This article is protected by copyright. All rights reserved

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“…Among them, solar thermal conversion [3][4][5] is the most popular and straightforward strategy compared to solar electric and solar chemical conversion. So far, solar-to-thermal conversion has gained broad applications in wastewater separation/ purification [6], electricity generation [7,8], solar power generation [9], seawater desalination [10], solar thermoelectric generator [11] and concentrated solar power system [12].…”

Section: Introductionmentioning

confidence: 99%

Absorption characteristics and solar absorption capacity of Au core NR coated with various shell material

Xing

Wang

et al. 2023

Nanotechnology

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Au nanorods (NRs) can be used to improve the performance of direct absorption solar collectors (DASCs), however, the solar absorption of Au NRs should be further improved because the absorption of Au NRs in near-infrared range is strong while the absorption in visible range is relatively weak where the solar spectrum intensity is the strongest. Based on this tissue, a composite nanostructure composed of Au core NR and Mg shell is proposed to improve the solar absorption capacity. The choice of Mg material as the shell composition is explained. By optimizing the composition structure, the enhancement effect on the absorption properties of Au@Mg NR from visible range to near-infrared range is proven by the finite element method. Furthermore, the effect of imperfect shell on absorption capacity of Au@Mg NR is discussed. Finally, the DASCs performance based on optimal Au@Mg NR nanofluids is evaluated. The results show that when the volume fraction is lower than 2 ppm and the collector depth is 2 cm, the highest solar energy harvesting capacity (>92%) using Au@Mg NRs nanofluids can be obtained, showing an excellent Au-based material for DASCs application.

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Efficient solar energy harvesting enabled by high-entropy ceramic nanofilms through a co-sputtering method

Cited by 5 publications

References 51 publications

High‐Entropy Engineering for Broadband Infrared Radiation

High‐Entropy Engineering for Broadband Infrared Radiation

High‐Entropy Photothermal Materials

Absorption characteristics and solar absorption capacity of Au core NR coated with various shell material

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