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Coatings
Special Issues
Micro/Nanomaterials for Heat Transfer, Energy Storage and Conversion
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Micro/Nanomaterials for Heat Transfer, Energy Storage and Conversion

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Engineering for Energy Harvesting, Conversion, and Storage".

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 11379

Special Issue Editors

Dr. Mingjian He

E-Mail Website
Guest Editor
School of Energy Science and Engineering, Harbin Institute of Technology, 92 West DaZhi Street, NanGang District, Harbin, China
Interests: photothermal conversion; metamaterials; near-field radiative heat transfer
Dr. Yasong Sun

E-Mail Website
Guest Editor
School of Power and Energy, Northwestern Polytechnical University, Youyi West Rd 127, Xi’an 710072, China
Interests: radiative heat transfer; heat and mass transfer in two phase flow; thermal management in high temperature equipment
Dr. Zhaolong Wang

E-Mail Website
Guest Editor
College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China
Interests: bionic interface; low-carbon functional devices; wearable devices; 3D printing technique; metasurfaces
Special Issues, Collections and Topics in MDPI journals
Dr. Boxiang Wang

E-Mail Website
Guest Editor
Institute of Engineering Thermophysics, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Interests: micro/nanoscale thermal radiation and metamaterial-based energy devices; radiative transfer in disordered/porous media; topological, quantum and non-Hermitian optics/photonics

Special Issue Information

Dear Colleagues,

We are pleased to invite you to submit your work to this Special Issue of Coatings on “Micro/Nanomaterials for Heat Transfer, Energy Storage and Conversion”.

Micro/Nanomaterials are known to exhibit a number of interesting physical properties with excellent performance in the fields of heat transfer, energy conversion and storage, which also have great promise in nanoscale electronics, sensors, photonics devices and biomedical applications. With the continuous increase of CO2 emission and the shrinking of fossil energy supply, there is a great demand for clean and renewable energy technologies. Towards this aim, we are establishing a Special Issue of Coatings, which provides a platform for researchers in related fields to publish their research efforts.

In this Special Issue, original research articles and reviews are welcome. Research areas may include, but are not limited to, the following:

  • Theoretical and experimental research, new ideas in heat transfer, energy storage and conversion using micro/nanomaterials;
  • Synthetic and natural characterization of advanced energy storage micro/nanomaterials.

We look forward to receiving your contributions.

Dr. Mingjian He
Dr. Yasong Sun
Dr. Zhaolong Wang
Dr. Boxiang Wang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Coatings is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • energy storage
  • heat transfer enhancement
  • solar energy harvesting
  • radiative cooling
  • fuel cells
  • solar desalination
  • perovskite structure
  • thermoelectric
  • metamaterials
  • 2D materials

Published Papers (7 papers)

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Editorial

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7 pages, 248 KiB  
Editorial
Micro/Nanomaterials for Heat Transfer, Energy Storage and Conversion
by Ming-Jian He, Ya-Song Sun, Zhao-Long Wang and Bo-Xiang Wang
Coatings 2023, 13(1), 11; https://doi.org/10.3390/coatings13010011 - 21 Dec 2022
Cited by 4 | Viewed by 1725
Abstract
It is well known that micro/nanomaterials exhibit many physical properties in the fields of heat transfer, energy conversion and storage, and also have great prospects in nanoelectronics, sensors, photonic devices and biomedical applications [...] Full article
(This article belongs to the Special Issue Micro/Nanomaterials for Heat Transfer, Energy Storage and Conversion)

Research

Jump to: Editorial

14 pages, 1750 KiB  
Article
Analysis and Kinetics Modeling of the Isothermal Oxidation Behavior of Silicide Coatings
by Dongyang An, Jingsheng Zhang, Zhipeng Liang, Yunji Xie, Mingyu Gao, Deshun Sun, Peng Xiao and Jingmin Dai
Coatings 2023, 13(8), 1464; https://doi.org/10.3390/coatings13081464 - 20 Aug 2023
Viewed by 613
Abstract
In this paper, an online apparatus was developed for isothermal thermogravimetric measurement of silicide coatings within a wide temperature range (from −180 °C to 2300 °C) based on thermogravimetric analysis. Firstly, the measuring principle and method regarding silicide coatings of this apparatus were [...] Read more.
In this paper, an online apparatus was developed for isothermal thermogravimetric measurement of silicide coatings within a wide temperature range (from −180 °C to 2300 °C) based on thermogravimetric analysis. Firstly, the measuring principle and method regarding silicide coatings of this apparatus were studied. Secondly, on the basis of oxidation kinetics analysis, the intrinsic mechanism and kinetic parameters of three stages (oxidation, diffusion, and fall-off) of silicide coatings were studied, and the oxidation kinetics features were also analyzed. In addition, according to mathematical physics methods, a kinetics model of silicide coatings in different stages of oxidation was established, including parameters such as weight change, oxidation rate, oxidation time, etc. Finally, online isothermal experiments from −180 °C to 2300 °C werecarried out and analyzed. The results showed that the kinetic model established in this paper was in good agreement with the oxidation process of silicide coatings. In this paper, a complete kinetics model including different oxidation stages is proposed for the entire oxidation process of a silicide coating, revealing its oxidation mechanism. The research will play a significant role in the study of preparation technology improvement and high-temperature environment application. This paper studied two measuring methods: weight gain and weight loss measuring methods. Also, an experiment was carried out on the silicide coatings to explore the physical oxidation process between −180 °C and 2300 °C. The results proved the perfect consistency of the kinetics model proposed by this paper and the oxidation process of silicide coatings. This paper will play a significant role in the study of preparation technology enhancement and high-temperature environment application. It also provides a theoretical foundation for accelerated aging and life evaluation methods. Full article
(This article belongs to the Special Issue Micro/Nanomaterials for Heat Transfer, Energy Storage and Conversion)
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18 pages, 11965 KiB  
Article
Enhanced Performance of Nickel–Cobalt Oxides as Selective Coatings for Flat-Plate Solar Thermal Collector Applications
by Reyna Dianela Bacelis-Martínez, Dallely Melissa Herrera-Zamora, Manuel Ávila Santos, Octavio García-Valladares, Adriana Paola Franco-Bacca, Geonel Rodríguez-Gattorno and Miguel Ángel Ruiz-Gómez
Coatings 2023, 13(8), 1329; https://doi.org/10.3390/coatings13081329 - 28 Jul 2023
Viewed by 855
Abstract
Solar thermal collectors represent a practical option to capture energy from the sun, providing low-cost domestic and industrial heating and decreasing the dependency on fossil fuels. Spinel-type metal oxides show interesting physicochemical properties and so can be used as active materials for converting [...] Read more.
Solar thermal collectors represent a practical option to capture energy from the sun, providing low-cost domestic and industrial heating and decreasing the dependency on fossil fuels. Spinel-type metal oxides show interesting physicochemical properties and so can be used as active materials for converting solar energy to electrical, chemical, and heat energy. We report the synthesis and characterization of nickel–cobalt mixed metal oxides used as an active phase in selective paints for solar absorber coatings applied to a domestic flat collector. The nickel–cobalt mixed oxides crystallized in the cubic phase related to the spinel structure, exhibiting good thermal stability and reproducibility. These mixed oxides presented oxidation states (2+ and 3+) for both nickel and cobalt. The coatings fabricated from the selective paints based on nickel–cobalt mixed oxides showed a solar absorptance value of 94%, while for the commercial paint Solkote®, the value was 93%. A representative coating based on the NiCo2O4 composition was evaluated for the first time in a domestic-type flat solar collector for water heating under real operating conditions, achieving an outstanding performance that competes with that of commercial collectors. The potential application of nickel–cobalt mixed oxides in solar collectors opens up new opportunities for future innovations and developments in functional absorber coatings. Full article
(This article belongs to the Special Issue Micro/Nanomaterials for Heat Transfer, Energy Storage and Conversion)
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17 pages, 10252 KiB  
Article
Element Differential Method for Non-Fourier Heat Conduction in the Convective-Radiative Fin with Mixed Boundary Conditions
by Jing Ma, Yasong Sun and Sida Li
Coatings 2022, 12(12), 1862; https://doi.org/10.3390/coatings12121862 - 30 Nov 2022
Cited by 3 | Viewed by 1291
Abstract
Fin is an efficient and straightforward way to enhance heat transfer rate. When the heat source varies dramatically in a very short time, non-Fourier heat conduction should be considered. In the paper, taking advantage of numerical stability and no integral and easy-to-implement features [...] Read more.
Fin is an efficient and straightforward way to enhance heat transfer rate. When the heat source varies dramatically in a very short time, non-Fourier heat conduction should be considered. In the paper, taking advantage of numerical stability and no integral and easy-to-implement features of an element differential method, a numerical model is developed to evaluate the fin efficiency of the convective-radiative fin within non-Fourier heat conduction. In this fin, heat is generated by an internal heat source and dissipated by convection and radiation. Both periodic and adiabatic boundary conditions are considered. The accuracy and efficiency of the element differential method is validated by several numerical examples with analytical solutions. The results indicate that the element differential method has high precision and flexibility to solve non-Fourier heat conduction in convective-radiative fin. Besides, the effects of Vernotte number, dimensionless periodicity, thermal conductivity coefficient, and emissivity coefficient on dimensionless fin tip temperature, instantaneous fin efficiency, and average fin efficiency are comprehensively analyzed. Full article
(This article belongs to the Special Issue Micro/Nanomaterials for Heat Transfer, Energy Storage and Conversion)
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10 pages, 5560 KiB  
Article
A Split-Ring Resonator-Loaded Honeycomb Sandwich Structure for Broadband Microwave Absorption
by Yiming Zhao, Qingwei Liu, Zhonghao Xu, Guoliang Ji and Ran Mo
Coatings 2022, 12(11), 1706; https://doi.org/10.3390/coatings12111706 - 09 Nov 2022
Viewed by 1078
Abstract
Split-ring resonators are excellent left-handed metamaterials for significant electromagnetic coupling behavior. In this work, a split-ring resonator prepared with Ni-doped zeolitic imidazolate framework-67/epoxy resin (ZIF-67/ER) was embedded in the top layer to optimize microwave absorption efficiency in the 2–4 GHz frequency band. The [...] Read more.
Split-ring resonators are excellent left-handed metamaterials for significant electromagnetic coupling behavior. In this work, a split-ring resonator prepared with Ni-doped zeolitic imidazolate framework-67/epoxy resin (ZIF-67/ER) was embedded in the top layer to optimize microwave absorption efficiency in the 2–4 GHz frequency band. The Ni-doped ZIF-67/epoxy resin served as the bottom layer to improve microwave absorption efficiency in the 4–8 GHz frequency band. Honeycomb with a conductive carbon black coating served as the middle layer to generate electromagnetic loss for the overall frequency band. Based on the composite structure integration technology, RL < −10 dB was realized under the oblique incidence of 0–70 degrees. Both simulation and experiments indicate that a split-ring resonator made of lossy material can be an effective strategy to broaden the effective absorption bandwidth and increase the corresponding structure’s insensitivity to polarization and the incidence angle of microwave. Full article
(This article belongs to the Special Issue Micro/Nanomaterials for Heat Transfer, Energy Storage and Conversion)
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15 pages, 7964 KiB  
Article
Investigation of Leakage and Heat Transfer Properties of the Labyrinth Seal on Various Rotation Speed and Geometric Parameters
by Zhiguo Wang, Bo Zhang, Yuanxiang Chen, Sheng Yang, Hongmei Liu and Honghu Ji
Coatings 2022, 12(5), 586; https://doi.org/10.3390/coatings12050586 - 25 Apr 2022
Cited by 2 | Viewed by 1785
Abstract
To investigate the influence of the variation of geometric parameters on the leakage and heat transfer characteristics of labyrinth seals at various rotational speeds, the labyrinth seal models with different geometric parameters were numerically simulated based on the control variable methods. Results show [...] Read more.
To investigate the influence of the variation of geometric parameters on the leakage and heat transfer characteristics of labyrinth seals at various rotational speeds, the labyrinth seal models with different geometric parameters were numerically simulated based on the control variable methods. Results show the aerodynamic mechanism of leakage characteristics changing with rotational speed, as well as the leakage characteristics of labyrinth seals under the coupling action of geometric parameters and rotating speeds. When the characteristic scale changes along the direction of centrifugal force, the variation trend of labyrinth seal leakage characteristics is consistent at different rotational speeds. However, the leakage characteristics of labyrinth seals show the difference of rotational speed when the feature scale changes along the axis. At the same time, the laws of convective heat transfer on the surface of the rotor and stator are shown by the results of the studies, which provides reference for the thermodynamic analysis of labyrinth seals. Full article
(This article belongs to the Special Issue Micro/Nanomaterials for Heat Transfer, Energy Storage and Conversion)
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12 pages, 2287 KiB  
Article
Enhanced Electrocatalytic CO2 Reduction of Bismuth Nanosheets with Introducing Surface Bismuth Subcarbonate
by Shiyuan Liu, Botao Hu, Junkai Zhao, Wenjun Jiang, Deqiang Feng, Ce Zhang and Wei Yao
Coatings 2022, 12(2), 233; https://doi.org/10.3390/coatings12020233 - 11 Feb 2022
Cited by 13 | Viewed by 3067
Abstract
The electrocatalytic CO2 reduction reaction (CO2RR) into hydrocarbon products is one of the most promising approaches for CO2 utilization in modern society. However, the application of CO2RR requires optimizing state-of-the-art catalysts as well as elucidating the catalytic [...] Read more.
The electrocatalytic CO2 reduction reaction (CO2RR) into hydrocarbon products is one of the most promising approaches for CO2 utilization in modern society. However, the application of CO2RR requires optimizing state-of-the-art catalysts as well as elucidating the catalytic interface formation mechanism. In this study, a flower-like nano-structured Bi catalyst is prepared by a facile pulse current electrodeposition method wherein the morphologies could be accurately controlled. Interestingly, nano-structured Bi is inclined to generate Bi2O2CO3 in the air and form a stable Bi2O2CO3@Bi interface, which could enhance the CO2 adsorption and conversion. In-situ Raman spectroscopy analysis also proves the existence of Bi2O2CO3 on the electrode surface. In a practical CO2 reduction test by a flow-cell reactor, the Bi2O2CO3@Bi electrode delivers a high faradaic efficiency of the CO2 to formate/formic acid (~90%) at −1.07 V vs. reversible hydrogen electrode (RHE) with no obvious decay during more than a 10 h continuous test. The introducing surface Bi2O2CO3 in nano-structured Bi supports a promising strategy as well as facile access to prepare improved CO2RR electrocatalysts. Full article
(This article belongs to the Special Issue Micro/Nanomaterials for Heat Transfer, Energy Storage and Conversion)
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