Article
Energy & Fuels
Surya Tanwar, Raminder Kaur
Summary: The study focuses on preparing Micro-PCMs capsules with caprylic acid as the core material and PMMA as the shell using suspension-like polymerization method. The Micro-PCMs were characterized by various techniques and showed good thermal stability and heat storage/release performance. They have the potential for applications in thermal energy storage, such as passive space heating or cooling, smart textiles, and thermo-responsive functional coatings.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Construction & Building Technology
Dongdong Xu, Yun Huang, Wenwei Liu, Tong Sun, Meiju Zhang
Summary: This paper presents a new microencapsulated phase change material (MPCM) with high thermal conductivity and great enhancement in thermal conductivity. When added to phosphogypsum (PG), a composite PG-MPCM with good thermal storage capacity and compatibility is formed. The composite material maintains its thermal stability even after 2000 thermal cycles.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Energy & Fuels
Takahiro Kawaguchi, Hiroki Sakai, Ryosuke Ishida, Yuto Shimizu, Ade Kurniawan, Takahiro Nomura
Summary: This study presents an improved method for the preparation of microencapsulated PCM with high heat storage density and cyclic durability, showing promise for future medium-to-high temperature heat applications.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Engineering, Environmental
Shuo Wang, Ke Lei, Zhiyuan Wang, Hao Wang, Deqiu Zou
Summary: This paper provides an overview of the classification, preparation methods, and applications of metal-based phase change material microcapsules. The performance of the microcapsules is evaluated by comparing thermophysical properties. Furthermore, existing problems and future research directions are discussed.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Multidisciplinary
Veerakumar Chinnasamy, Jaehyeok Heo, Hoseong Lee, Yongseok Jeon, Honghyun Cho
Summary: This study focuses on the preparation and thermophysical characterization of microencapsulated stearyl alcohol (SA) for thermal energy storage and heat transportation applications. The synthesized PCM microcapsules show good morphological structure, with an average diameter of 4.7 mm. The developed MPCM exhibits thermally stability and chemical stability during the phase change process.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Yeliz Konuklu, Hasan Burak Akar
Summary: This study developed a microencapsulated material for thermal energy storage based on poly(allyl methacrylate) and palmitic acid, which exhibited a good latent heat storage capacity and showed potential for thermal management applications, particularly in buildings.
Article
Chemistry, Applied
Vennapusa Jagadeeswara Reddy, Prakhar Dixit, Jitendra Singh, Sujay Chattopadhyay
Summary: The main objective of this study is to prepare completely biodegradable macrocapsules for thermal energy storage. Three different organic phase change materials were encapsulated inside barium crosslinked pectin shell. The results showed that the pectin-PCM capsules had high encapsulation efficiency and thermal stability, and could provide long-lasting thermal buffering effects.
CARBOHYDRATE POLYMERS
(2022)
Article
Energy & Fuels
Yuto Shimizu, Takahiro Kawaguchi, Hiroki Sakai, Kaixin Dong, Ade Kurniawan, Takahiro Nomura
Summary: In this study, an MEPCM using Al-5 wt.%Ni alloy was developed, which exhibited high latent heat capacity with a higher melting and solidification point. The developed MEPCM maintained its original shape and high latent heat capacity, even after multiple cycles of melting and solidification. Al-Ni alloy-based MEPCM is expected to be applied in the next-generation high-temperature latent heat thermal energy storage systems.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Energy & Fuels
Samaneh Sami, Nasrin Etesami
Summary: In this study, nanoparticles of MgO, TiO2, and Graphite were added to the microencapsulated Lauric acid to investigate their effects on thermal properties. The microencapsulation ratio increased with MgO and TiO2 mass ratios, but decreased with a higher mass ratio of nano graphite. TiO2 nanoparticles showed the highest microencapsulation ratio and improved thermal stability.
Article
Energy & Fuels
Takahiro Kawaguchi, Julalak Yoolerd, Hiroki Sakai, Yuto Shimizu, Ade Kurniawan, Takahiro Nomura
Summary: This study improves the durability of an Al-based MEPCM with an Al2O3 coating and reports its excellent heat storage capacity of 186 J g(-1). By modifying the conventional process and adding Al(OH)3, the proposed Al-based MEPCM is able to withstand 300 melting and solidification cycles. This Al-based MEPCM with excellent durability and high heat storage capacity may be further developed for use in future thermal energy storage and management systems.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Materials Science, Multidisciplinary
Sumit Parvate, Jitendra Singh, Prakhar Dixit, Jagadeeswara Reddy Vennapusa, Tushar Kanti Maiti, Sujay Chattopadhyay
Summary: This study successfully synthesized dual-functional microcapsules with thermal energy storage and photocatalytic activity using a novel approach, where TiO2 was used as a particle stabilizer and photocatalyst. The thermal energy storage and photocatalytic properties were comprehensively characterized for the microcapsules.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Energy & Fuels
Yuto Shimizu, Shunsuke Cho, Takahiro Kawaguchi, Keita Tanahashi, Kaixin Dong, Tomokazu Nakamura, Ade Kurniawan, Melbert Jeem, Takahiro Nomura
Summary: A core-shell-type microencapsulated phase change material (MEPCM) with a ternary eutectic alloy system was successfully developed for the first time in this study. The MEPCM exhibited a high melting point and latent heat, and had a significantly higher heat storage density compared to other reported MEPCMs. Furthermore, it showed great durability, retaining over 90% of its latent heat capacity after 100 cycles of heat storage and release tests.
JOURNAL OF ENERGY STORAGE
(2024)
Article
Construction & Building Technology
Osman Gencel, Ahmet Sari, Serkan Subasi, Muhammed Bayram, Aamar Danish, Muhammed Marasli, Gokhan Hekimoglu, Abid Ustaoglu, Togay Ozbakkaloglu
Summary: The light-transmitting cementitious composite with microencapsulated phase change material aims to reduce energy utilization in buildings and improve solar thermal energy efficiency. The study findings have significant implications for enhancing lighting efficiency and energy saving in buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Energy & Fuels
Fatma Erzin, Yeliz Konuklu
Summary: This study aimed to synthesize and characterize microencapsulated phase-change material for thermal energy storage applications, using hexadecane as the core material. Microcapsules were synthesized using different resins and amounts of resorcinol, resulting in colored hexadecane microcapsules with good thermal properties and mechanical stability. Characterization through DSC, SEM, and FTIR confirmed the successful synthesis of leakage-free microcapsules.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Thermodynamics
Abdul Malik Turan, Yeliz Konuklu
Summary: In recent years, polymer/mineral composites have been produced by adding natural minerals to polymers, resulting in desired properties due to their natural resource, low costs, and ease of use. In this study, capric acid was microencapsulated with melamine formaldehyde and colemanite-doped melamine formaldehyde composites were used as thermal energy storage materials. The analysis results showed that the addition of colemanite improved the thermal stability and thermal energy storage capacity of the microcapsules. These microcapsules melted at -28 degrees C with a latent heat of -89 J/g. The usage of these microcapsules and composites in buildings can help reduce energy load and greenhouse gas emissions.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Energy & Fuels
Kemal Cellat, Beyza Beyhan, Yeliz Konuklu, Cengiz Dundar, Okan Karahan, Caner Gungor, Halime Paksoy
Article
Energy & Fuels
Aysegul Cetin, Yusuf Kagan Kadioglu, Halime Paksoy
Article
Energy & Fuels
Nurten Sahan, Halime Paksoy
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2020)
Article
Chemistry, Physical
Abrar Ahmad, Gurbet Yerlikaya, Zia-ur-Rehman, Halime Paksoy, Guifeza Kardas
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Review
Energy & Fuels
Burcu Kocak, Ana Ines Fernandez, Halime Paksoy
Article
Energy & Fuels
B. Kocak, A. Fernandez, H. Paksoy
Summary: Waste materials, such as demolition wastes from urban regenerations in Turkey, have shown promising potential as sustainable and durable sensible thermal energy storage materials. The study compared the storage performance of demolition wastes with other waste and by-product storage materials, revealing that demolition wastes can be used effectively for high temperature thermal energy storage applications.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Energy & Fuels
Burcu Kocak, Ana Ines Fernandez, Halime Paksoy
Summary: The study confirms that STESM developed from demolition waste demonstrates good thermal and mechanical stability, making it a reliable option for long-term use in solar heat industrial applications.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Abrar Ahmad, Fatih Tezcan, Gurbet Yerlikaya, Zia-ur-Rehman, Halime Paksoy, Gulfeza Kardas
Summary: In this study, a three-dimensional double layered rosette-rod TiO2/Bi2S3 heterojunction was successfully fabricated using a two-step hydrothermal method and solvothermal route. The seed layer approach was utilized to achieve uniform distribution of Bi2S3 and form a perfect heterojunction between TiO2 and Bi2S3. The photoelectrochemical performance testing showed that the synthesized RT_Bi2S3 photoanode demonstrated superior photocurrent density compared to other TiO2 and Bi2S3 based photoanodes reported in the literature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Energy & Fuels
Gizem Bicer Goktepe, Mohammed Farid, Halime Paksoy
Summary: Fluidized beds are commonly used for heat and mass transfer in chemical processes, as well as for storing thermal energy and utilizing solar energy. Fine-tuning the properties of microencapsulated PCMs is essential for their effectiveness in fluidized beds. Experimental studies show that efficient thermal storage using microencapsulated PCM can be achieved in air-fluidized beds with high efficiencies.
Article
Energy & Fuels
Burcu Kocak, A. Ines Fernandez, Halime Paksoy
Summary: This study investigates the potential of using waste materials as low-cost thermal energy storage materials, which can be converted into high-performance STESMs through pre-treatment processes, making them suitable for solar heat industrial applications.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Energy & Fuels
Fatma Erzin, Yeliz Konuklu
Summary: This study aimed to synthesize and characterize microencapsulated phase-change material for thermal energy storage applications, using hexadecane as the core material. Microcapsules were synthesized using different resins and amounts of resorcinol, resulting in colored hexadecane microcapsules with good thermal properties and mechanical stability. Characterization through DSC, SEM, and FTIR confirmed the successful synthesis of leakage-free microcapsules.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Fatih Tezcan, Abrar Ahmad, Gurbet Yerlikaya, Guelfeza Zia-ur-Rehman, Halime Paksoy, Gulfeza Kardas
Summary: In this research, alpha-Fe2O3/Bi2S3 heterojunction photoelectrodes were successfully fabricated on FTO substrate using hydrothermal and solvothermal approaches to improve photoelectrochemical water splitting. The optimized alpha-Fe2O3/Bi2S3 photoanode demonstrated significantly higher photocurrent density compared to pristine alpha-Fe2O3, and showed enhanced photo catalytic performance under solar irradiation. The improvements were attributed to improved light-harvesting efficiency, enhanced conductivity, and effective charge separation at the alpha-Fe2O3/Bi2S3 interface.
Article
Energy & Fuels
Sedat Emir, Halime Paksoy
Summary: Phase change materials (PCM) were microencapsulated to improve handling and compatibility, while enhancing thermal conductivity. A low-cost and facile self-assembly method was used to synthesize microencapsulated PCMs with increased thermal conductivity, achieved through successful encapsulation.
Article
Energy & Fuels
Burcu Kocak, Halime Paksoy
Article
Chemistry, Multidisciplinary
Berk Kazanci, Kemal Cellat, Halime Paksoy
Article
Energy & Fuels
Shahriyar Safat Dipta, Md Habibur Rahaman, Walia Binte Tarique, Ashraful Hossain Howlader, Ayush Pratik, John A. Stride, Ashraf Uddin
Summary: Implementing a double-sided passivation approach can enhance the performance of n-i-p structured PSCs and improve the stability and photovoltaic properties of the cells.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Daniel Ourinson, Andreas Brand, Andreas Lorenz, Marwan Dhamrin, Sebastian Tepner, Michael Linse, Nathalie Goettlicher, Kosuke Tsuji, Jonas D. Huyeng, Florian Clement
Summary: This work presents two approaches to reduce the amount of silver on the rear side of M2-sized industrial iTOPCon solar cells. The Cu-based approach shows promise with similar power conversion efficiency compared to the conventional approach, while the Al-based approach exhibits some limitations but demonstrates the potential of such type of contact for iTOPCon solar cells.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Abasifreke Ebong, Donald Intal, Sandra Huneycutt, Thad Druffel, Ruvini Dharmadasa, Kevin Elmer, Apolo Nambo
Summary: This study demonstrates the successful metallization of a PERC silicon solar cell using screen-printable copper (Cu) paste. The Cu paste contains antioxidant additives and diffusion inhibitors to prevent oxidation and diffusion of Cu. The Cu-printed cells achieved an efficiency of 19% and showed no Cu diffusion after characterization tests. The long-term stability and effectiveness of the Cu diffusion barrier were also confirmed.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Senami Zogbo, Wilfried Favre, Olivier Bonino, Marie-Estelle Gueunier-Farret
Summary: Measuring specific contact resistivity (pc) is crucial for interface engineering in high efficiency solar cells. The Transfer Length Method (TLM) is commonly used for evaluating layer sheet resistance (Rsheet) and pc, but it is not suitable for metal/Transparent Conductive Oxide (TCO) interface evaluation in silicon heterojunction (SHJ) cells. This study investigates the parameters that restrict current confinement within the TCO, including mid-gap trap density (Dit) at the a-Si:H/c-Si interface and the activation energy (Ea = Ec - EF) variation of a-Si:H contact layers.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Jean-Baptiste Charpentier, Philippe Voarino, Julien Gaume
Summary: The phenomenon of ribbon lengthening in PV modules exposed to thermal cycling is not well explained in the literature. In this study, a three layers model is proposed to explain this effect, and the predictions of the model are validated through finite element method simulations and experiments. The results show that the model predictions are consistent with the indirect measurements, but not with the direct measurements. Additionally, it is inferred that the encapsulant plays a role after the solder failure.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Jean-Baptiste Charpentier, Philippe Voarino, Julien Gaume
Summary: This study investigates the problematic ribbon lengthening observed in PV modules exposed to high amplitude thermal cycling. A simplified system model is proposed and accurate predictions are obtained using the Finite Element Method. The results show that the thickness of the encapsulant has a substantial impact on the lengthening of the ribbons.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
S. Catalan-Gomez, E. Martinez Castellano, M. Schwarz, M. Montes Bajo, L. Dorado Vargas, A. Gonzalo, A. Redondo-Cubero, A. Gallego Carro, A. Hierro, J. M. Ulloa
Summary: This study investigates the use of core-shell gallium nanoparticles as functional light scatterers on solar cells. By optimizing the nanoparticle size, the short-circuit current of the solar cells is significantly improved. The underlying physical mechanism is studied through optical measurements and simulations, and a method to reduce the plasmonic effect of the nanoparticles is demonstrated.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
M. Gamel, G. Lopez, A. M. Medrano, A. Jimenez, A. Datas, M. Garin, I. Martin
Summary: In this study, a highly reflective ohmic contact to p-type c-Ge material is demonstrated, which can improve the efficiency of thermophotovoltaic devices. The experimental results show that this contact can simultaneously meet the requirements of good back surface passivation, low electrical resistivity, and high reflectivity. Moreover, simulations suggest that implementing these back contacts has the potential to achieve conversion efficiencies comparable to high-efficiency c-Ge TPV cells.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Hongyang Wei, Qing Xu, Dongchu Chen, Min Chen, Menglei Chang, Xiufang Ye
Summary: This study prepared solar selective absorption films based on anodic aluminum oxide (AAO) photonic crystals using a unique electrodeposition method. The Co-Ag electrodeposited film exhibited superior solar selective absorption properties and thermal stability.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Ankit Kumar, Ankit Chauhan, Jordi Llobet, Helder Fonseca, Patricia C. Sousa, Carlos Calaza, Gil Shalev
Summary: This study found that decorating subwavelength arrays with SiO2 quasi-nanolenses (qNL arrays) can enhance the absorption of the solar spectrum. Optical absorption mechanisms in qNL arrays were investigated using near-field scanning optical microscopy (NSOM), revealing that the enhancement is a result of the combination of effective antireflection coating, increased optical interactions between adjacent dielectrics for elevated light trapping, and strong light concentration due to the presence of qNLs.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
S. Pingel, T. Wenzel, N. Goettlicher, M. Linse, L. Folcarelli, J. Schube, S. Hoffmann, S. Tepner, Y. C. Lau, J. Huyeng, A. Lorenz, F. Clement
Summary: This study demonstrates the potential to reduce silver consumption in highly efficient SHJ cells through fine-line screen printing using low temperature paste with various screens. The results show that using finer mesh allows for narrower grid fingers and lower resistance, leading to improved cell efficiency. Simulation results indicate that module wire configuration is crucial for reducing silver consumption.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Xibo He, Jun Qiu, Wei Wang, Yicheng Hou, Yong Shuai
Summary: This paper proposes a novel phase change material with high thermal conductivity and stability for fast photo-thermal conversion and storage. The experimental results demonstrate excellent durability and stability of the phase change material, with good performance in thermal conductivity and thermal storage efficiency.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Qingyuan Liu, Lin Wang, Zheng Liu, Guohua Liu
Summary: A new evaporating structure consisting of liquid marble with tunable nanowire array is proposed to enhance solar evaporation. The experiments show that the liquid marble with nanowire array exhibits outstanding evaporation performance, which has significant implications for seawater desalination or wastewater treatment.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Hao Liu, Qiming Liu, Jinpei Liu, Yonggang Zhao, Yingjie Yu, Yue An, Ganghui Wei, Yanzheng Li, Yujun Fu, Junshuai Li, Deyan He
Summary: Moisture in the air is identified as the main cause of performance degradation in organic-inorganic hybrid solar cells. Exposure to air leads to the growth of thin oxide layer on the interface and the formation of silver sulfide, increasing the series resistance and decreasing the fill factor, thus degrading the cell performance.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
E. Blanco, P. Martin, M. Dominguez, P. Fernandez-Palacios, I. Lombardero, C. Sanchez-Perez, I. Garcia, C. Algora, M. Gabas
Summary: This study addresses the lack of optical parameters for p-type Ge wafers by determining the complex refractive indices of commercial Ge wafers with varying doping levels. The obtained data successfully reproduces the critical points associated with interband transitions and absorption features below the bandgap. The refractive indices were validated through experimental measurements and solar cell simulations.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
