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Energy Storage and Conversion: From Materials, Devices to Applications

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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: 10 December 2024 | Viewed by 2735

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Special Issue Editor

Dr. Ning Sun

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Guest Editor

State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China
Interests: carbon and MXene-based materials for energy storage
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The development of renewable energy sources has aroused great interest in the field of energy storage and conversion technologies. This Special Issue, entitled "Energy Storage and Conversion: From Material, Device to Application" aims to report on the most recent advancements in developing innovative energy storage and conversion technologies, such as lithium/sodium/potassium ion batteries, lithium–sulfur batteries, supercapacitors, aqueous zinc-ion batteries, electrocatalysis, photocatalysis, etc. The contribution of original research articles and reviews on the material design, structural characterization, device fabrication, theoretical calculation, energy storage mechanism, and industrial engineering for energy storage and conversion are strongly encouraged in this Special Issue and would be gladly received.

We look forward to receiving your contributions.

Dr. Ning Sun
Guest Editor

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

secondary battery
supercapacitor
electrocatalysis and photocatalysis
energy storage
energy conversion
advanced material
device
application

Published Papers (4 papers)

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Research

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16 pages, 4212 KiB

Open AccessArticle

Synthesis of Flower-like Crystal Nickel–Cobalt Sulfide and Its Supercapacitor Performance

by Haoran Yu, Ding Shen, Ran Zhang and Shiyu Zhao

Coatings 2024, 14(5), 564; https://doi.org/10.3390/coatings14050564 - 2 May 2024

Viewed by 380

Abstract

In order to improve the pseudocapacitance performance of metal sulfide electrode materials and obtain supercapacitor energy storage devices with excellent electrochemical reversibility and long-term cycle stability, the synthesis of flower-shaped crystal nickel–cobalt sulfide and its supercapacitor performance were studied. NiCo₂S₄ flower-shaped crystal nickel–cobalt sulfide was prepared by the hydrothermal method with nickel foam as the raw material, and electrode materials were added to prepare supercapacitor electrodes for testing of the supercapacitor performance. The physical properties of flower-shaped crystal nickel–cobalt sulfide were tested by a scanning electron microscope and transmission electron microscope, and the voltammetric cycle and constant current charge and discharge of supercapacitor electrodes prepared from this sulfide were analyzed through experiments. The experimental results showed that the flower crystal microstructure had a positive effect on the electrochemical properties. The capacitance value was always high at different current densities, and the capacity was as high as 3867.8 A/g at pH 12. After 2000 voltage–charge–discharge cycle tests, the petal-like sulfide capacity still had a retention rate of 90.57, the flower crystal nickel–cobalt sulfide still showed an excellent supercapacitor performance and the specific capacity was still high, which demonstrates that this sulfide has excellent cyclic stability and durability in electrochemical applications. Full article

(This article belongs to the Special Issue Energy Storage and Conversion: From Materials, Devices to Applications)

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12 pages, 9469 KiB

Open AccessArticle

Optimized Field Emission from Graphene Sheets with Rare Earth Oxides

by ZhiJianMuCuo Dong, Jianlong Liu, Dayang Wang, Guoling Zhong, Xingyue Xiang and Baoqing Zeng

Coatings 2024, 14(5), 545; https://doi.org/10.3390/coatings14050545 - 27 Apr 2024

Viewed by 297

Abstract

This paper demonstrates a simple method to improve the field emission of graphene sheets (GSs) by coating them with thin films of rare earth oxides. The rare earth oxide films are coated on GS using drop coating, without changing the surface morphology, resulting in a remarkable improvement in the field emission properties of GSs. The field emission property of GSs is tunable and can be optimized by applying various rare earth oxide films at the appropriate level. It is found that the turn-on field of GSs is reduced from 4.2 V/mm to 1.7 V/mm by Gd₂O₃ and to 2.2 V/mm by La₂O₃. The threshold field of GS is also reduced from 7.8 V/mm to 3.4 V/mm and 4.8 V/mm, respectively. Field emission results indicate that the improvement is due to the low work function surface and more effective emission sites generated around the GS surface after coating. The field emission test and the emission pattern suggest that the field emission performance of GS can be significantly enhanced through the application of La₂O₃ and Gd₂O₃ coating, as well as by optimizing the concentration of rare earth oxides in the coating. Hence, the rare earth-coated GS can serve as a potential field emitter. Full article

(This article belongs to the Special Issue Energy Storage and Conversion: From Materials, Devices to Applications)

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14 pages, 4725 KiB

Open AccessArticle

Synergistic Defect Management for Boosting the Efficiency of Cu(In,Ga)Se₂ Solar Cells

by Wanlei Dai, Zhaoyi Jiang, Yali Sun, Juhua Wang, Zeran Gao, Haoyu Xu, Xinzhan Wang, Chao Gao, Qiang Ma, Yinglong Wang and Wei Yu

Coatings 2024, 14(2), 164; https://doi.org/10.3390/coatings14020164 - 26 Jan 2024

Viewed by 682

Abstract

In this study, a feasible strategy is proposed for directly depositing high-quality Cu(In,Ga)Se₂ (CIGS) films using Na-doped targets in a selenium-free atmosphere to boost the power conversion efficiency (PCE) of CIGS solar cells. Introducing a small amount of sodium dopant effectively promoted the textured growth of CIGS crystals in the prepared films, resulting in larger grain sizes and a smoother interface. The higher MoSe₂ content at the CIGS/Mo interface increased the carrier lifetime in the films. In addition, sodium doping increased the proportion of Se atoms on the film surface and reduced the concentration of defects caused by the direct sputtering of the films in the selenium-free atmosphere. Therefore, the separation and transportation of photo-generated carriers in the devices were effectively enhanced. Using the optimized parameters, a record-high PCE of 17.26% was achieved for the 7.5% Na-doped devices, which represents an improvement of nearly 63%. Full article

(This article belongs to the Special Issue Energy Storage and Conversion: From Materials, Devices to Applications)

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Review

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22 pages, 1514 KiB

Open AccessReview

Application of Photovoltaic and Solar Thermal Technologies in Buildings: A Mini-Review

by Hua Xiao, Wenjin Lai, Aiguo Chen, Shini Lai, Wenjing He, Xi Deng, Chao Zhang and Hongyun Ren

Coatings 2024, 14(3), 257; https://doi.org/10.3390/coatings14030257 - 21 Feb 2024

Viewed by 1110

Abstract

Buildings account for a significant proportion of total energy consumption. The integration of renewable energy sources is essential to reducing energy demand and achieve sustainable building design. The use of solar energy has great potential for promoting energy efficiency and reducing the environmental impact of energy consumption in buildings. This study examines the applications of photovoltaic and solar thermal technologies in the field of architecture, demonstrating the huge potential of solar energy in building applications. To ensure a fresh and thorough review, we examine literature that encompasses the advancements made in the utilization of solar energy in buildings over the past decade. The key factors to consider in this study are reliability, performance, cost and aesthetics in real applications of photovoltaic and solar thermal technologies in the field of architecture, which have a significant impact on people’s acceptance of solar energy technology. Recent developments in feasible and effective optimization solutions for solar energy technologies are summarized. Accurate and convenient simulation techniques are also summarized for reference. The results show that the rapid progress of BIPV systems is fueled by advancements in three crucial areas: enhancing solar cell and module efficiency, reducing manufacturing costs and achieving a competitive levelized cost of electricity. The results can provide researchers with a reference for understanding recent technological developments in the integration of solar energy into buildings. Full article

(This article belongs to the Special Issue Energy Storage and Conversion: From Materials, Devices to Applications)

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