Article
Energy & Fuels
Ni Tan, Ting Xie, Ping Hu, Yang Feng, Qi Li, Sai Zhao, Hao-Nan Zhou, Wen-Bo Zeng, Ju-Lan Zeng
Summary: Form-stable phase change materials (PCMs) prepared via sol-gel method showed improved loading of hydrophobic components and enhanced thermal conductivity with the incorporation of exfoliated graphite nano platelets (xGnP). The PCMs exhibited high latent heat and long-term thermal reliability, with the addition of xGnP significantly increasing thermal conductivity. The high thermal conductivity of CA-PA/silica/xGnP form-stable PCM makes it a promising candidate for latent heat storage materials for building comfort control.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Materials Science, Multidisciplinary
Suryakanta Parida, R. K. Parida, B. N. Parida, Rajib Padhee, Nimai C. Nayak
Summary: The research focuses on nano-composites of xGnP filled EVA/EOC blend, analyzing its thermal, dielectric, and conducting properties. The study shows that increasing xGnP content improves crystallization temperature, stability, and conductivity in the composites, but there is an optimal loading level for these enhancements.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Construction & Building Technology
Gokhan Hekimoglu, Ahmet Sari, Osman Gencel, V. V. Tyagi
Summary: In this study, raw silica fume was used as a carrier matrix to develop form-stable latent heat storage materials with enhanced thermal conductivity. The materials exhibited significantly improved thermal conductivity and resistance against PEG leakage during heating. Various characterization techniques were employed to analyze the materials' properties. The results showed that the prepared materials can be utilized for engineering building materials or elements with solar heat storage capability.
ENERGY AND BUILDINGS
(2022)
Article
Chemistry, Physical
Shiyu Hou, Shuaijie He, Tianle Zhu, Jihui Li, Liqiang Ma, Hongda Du, Wanci Shen, Feiyu Kang, Zheng-Hong Huang
Summary: The traditional method of exfoliated graphite production faces challenges in energy conservation and pollution abatement. A new preparation method under room temperature conditions has been developed to acquire high-performance exfoliated graphite with significant potential for industrial applications.
JOURNAL OF MATERIOMICS
(2021)
Article
Energy & Fuels
Jianghui Cheng, Guoyuan Chen, Sensen Li, Feng Hou
Summary: The article reports a novel method for preparing phase change composites with high thermal conductivity and inhibited leakage by constructing a network of graphite nanoplatelets and Cu nanoparticles. The method demonstrates a significant increase in thermal conductivity, showing potential for improving thermal management performance in high-energy consumption devices.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Polymer Science
Jin Seob Kim, Kwan Han Yoon, Young Sil Lee, Jong Hun Han
Summary: The thermal conductivities of epoxy composites with Al-exfoliated graphite nanoplatelets increased with filler content, with partially inserted composites showing the highest thermal conductivity. Fully inserted composites had the highest tensile and flexural moduli, but all composites exhibited lower tensile and flexural strengths with increased filler content due to weaker interfaces between the epoxy matrix and filler.
MACROMOLECULAR RESEARCH
(2021)
Article
Materials Science, Composites
Xiaotong Wang, Zhichen Pu, Yiming Yang, Baojie Wei, Shuangqiao Yang
Summary: In this study, a highly thermally conductive percolation network was achieved by introducing a small amount of 2D graphene nanoplatelets into polymer-copper composites, resulting in a high isotropic thermal conductivity. The resulting composite material possesses excellent thermal management ability, acid resistance, and mechanical properties.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Minqiang Wu, Tingxian Li, Pengfei Wang, Si Wu, Ruzhu Wang, Jie Lin
Summary: A dual-encapsulation strategy was used to fabricate highly conductive and liquid-free phase change composites by constructing polyurethane/graphite nanoplatelets hybrid networks. The new material exhibited excellent mechanical strength, liquid-free phase change, and stable thermal properties.
Article
Chemistry, Physical
Tingxian Li, Minqiang Wu, Si Wu, Shizhao Xiang, Jiaxing Xu, Jingwei Chao, Taisen Yan, Tao Deng, Ruzhu Wang
Summary: By aligning vertically-aligned RGNPs inside PCCs, highly conductive PCCs with superior thermal and electrical conductivity were successfully fabricated. This method not only achieves efficient energy management with PCMs, but also makes significant progress in solar-thermal utilization and other heat-related processes.
Article
Materials Science, Ceramics
Francesca R. Lamastra, Mehdi Chougan, Emanuele Marotta, Samuele Ciattini, Seyed Hamidreza Ghaffar, Stefano Caporali, Francesco Vivio, Giampiero Montesperelli, Ugo Ianniruberto, Mazen J. Al-Kheetan, Alessandra Bianco
Summary: The addition of graphite nanoplatelets (GNPs) improved the density, compressive, and flexural strength of mortar, with high aspect ratio GNPs showing the best mechanical properties. However, the use of low aspect ratio GNPs resulted in decreased electrical resistivity and increased thermal conductivity in cementitious nanocomposites.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Multidisciplinary
Yingchun Liu, Kun Wu, Maoping Lu, Jun Shi, Liyan Liang, Mangeng Lu
Summary: A new bio-based epoxy thermoset with a Schiff base structure was synthesized and used to prepare high thermal conductivity nanocomposites by constructing microcapsule-structured BE/GNP powder. The nanocomposites exhibited significantly enhanced GNP dispersion and efficient TC network construction, leading to superior thermal conductivity performance compared to traditional epoxy materials. This approach not only showed promising thermal management applications for LED heat sinks, but also demonstrated the potential for environmentally friendly and highly thermal conductive polymeric composites.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Engineering, Environmental
Yu-Hao Ning, Ye Tan, Chuan-Huang Lin, Qi Li, Lin-Ping Yu, Zhong Cao, Li-Xian Sun, Chuan-Chang Li, Ju-Lan Zeng
Summary: Alumina-silica (Al-Si) and Al-Si/exfoliated graphite nanoplatelets (xGnPs) composite aerogels were prepared using an epoxide method followed by ambient pressure drying and heat treatment. The addition of xGnPs in Al-Si aerogels resulted in composite aerogels with high specific surface area and low volume shrinkage. The synthesized aerogels were then used to prepare form-stable phase change materials (FSPCMs) by vacuum infiltrating erythritol (ET). The FSPCMs exhibited enhanced thermal conductivity and light-to-thermal conversion efficiency, as well as good long-term thermal reliability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Abimannan Sethurajaperumal, Vanmathi Ravichandran, Ivan Merenkov, Kostya (Ken) Ostrikov, Eswaraiah Varrla
Summary: Liquid-phase exfoliation of 3D solid precursors into ultra-thin sheets of layered materials has gained global interest due to its simplicity and industrial applicability. The characteristics of exfoliated graphene depend on the processing technique and properties of the starting precursor materials. This study explored the role of initial 3D precursors in creating 2D materials by exfoliating graphite flakes of different sizes, and assessed the morphology and defects of the resulting nanosheets.
Article
Materials Science, Multidisciplinary
Ziwei Xu, Jingyi Deng, Yongjian Lai, Jianming Chen, Yirong Chen, Shijun Huang, Anfu Chen, Jingjing Zhang, Caihong Lei
Summary: This study investigates the exfoliation mechanism of graphene nanoplatelets (GNP) in polymer melts under elongational flow. The results show that the designed convergent-divergent channel can efficiently exfoliate GNP and significantly enhance the thermal conductivity of the composite material.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Construction & Building Technology
Yi Fang, Jialai Wang, Haibin Ma, Liang Wang, Xin Qian, Pizhong Qiao
Summary: Functionalizing colloidal nano-silica with tannic acid can significantly enhance the performance and durability of silica fume blended mortars, improving their mechanical properties and reducing porosity. Experimental results demonstrate that TA functionalization increases workability, decreases porosity, and enhances compressive strength of the mortars.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Young Uk Kim, Ji Hun Park, Beom Yeol Yun, Sungwoong Yang, Seunghwan Wi, Sumin Kim
Summary: The study found that impregnating carbon materials and phase change materials in lightweight aggregates can improve the thermal performance of artificial stone, but may slightly decrease compressive strength. By adjusting the type and amount of carbon materials added, thermal conductivity can be enhanced and peak temperature adjusted.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Thermodynamics
Dimberu G. Atinafu, Seunghwan Wi, Beom Yeol Yun, Sumin Kim
Summary: Efforts are being made to develop shape-stabilized composite phase change materials (PCMs) for renewable energy storage systems. This study engineered hybrid materials based on commercially available biochar and multiwalled carbon nanotubes, showing promising energy storage capacity in the composite PCMs.
Article
Construction & Building Technology
Seong Jin Chang, Youngtag Kim, Gyeong Seok Choi, Seunghwan Wi, Yujin Kang, Sumin Kim
Summary: Applying enhanced insulation products to buildings can improve building energy performance and reduce carbon emissions, aiding in climate change mitigation. This study developed new materials and technologies to improve the thermal performance of VIPs, proposing a VIP composite board for enhanced constructability.
ENERGY AND BUILDINGS
(2021)
Article
Environmental Sciences
Dimberu G. Atinafu, Beom Yeol Yun, Seunghwan Wi, Yujin Kang, Sumin Kim
Summary: In this study, four carbon materials were used to support heptadecane as phase change materials, showing varying effects on the PCM content and latent heat storage capacity of the composite PCMs. Intermolecular interactions and surface functionality of the encapsulating agents were found to play a major role in the thermal performance.
ENVIRONMENTAL RESEARCH
(2021)
Article
Thermodynamics
Jiwon Yoo, Seong Jin Chang, Sungwoong Yang, Seunghwan Wi, Young Uk Kim, Sumin Kim
Summary: The study utilized the WUFI software for thermal moisture simulation of buildings, finding the need for a vapor barrier paper inside walls to reduce mold growth and the higher moisture content of wool insulation materials compared to polyester. Evaluations of CLT walls with different insulation types showed vulnerability of glass wool-insulated walls to heat and humidity, while walls with PF insulation performed excellently in resisting heat and humidity.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Engineering, Environmental
Dimberu G. Atinafu, Beom Yeol Yun, Young Uk Kim, Seunghwan Wi, Sumin Kim
Summary: This study explores the use of "green" composite phase change materials prepared using biochar materials and organic phase change material n-eicosane (ES) for efficient thermal energy storage applications. The research found that composite materials derived from wheat straw biochar showed high energy storage capacity, while those derived from softwood biochar had lower latent heat storage capacity.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Construction & Building Technology
Beom Yeol Yun, Yujin Kang, Young Uk Kim, Seunghwan Wi, Sumin Kim
Summary: This study aimed to analyze the effect of using phase change materials (PCMs) to stabilize room temperature and solve the problem of temperature instability for temporary hospital beds. The results showed that the application of macro packed PCMs (MPPCM) in buildings can effectively reduce box temperature, providing a comfortable indoor space for temporary beds.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Young Uk Kim, Beom Yeol Yun, Jihee Nam, Ji Yong Choi, Seunghwan Wi, Sumin Kim
Summary: The strength performance of specimens was slightly degraded when 6% biochar was incorporated, while biochar use within 4% yielded similar or higher strength results. Moreover, the thermal conductivity decreased as the amount of biochar in the mixture increased; these thermal conductivity characteristics depended on the pore characteristics of the biochar type.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Environmental Sciences
Ji Hun Park, Young Uk Kim, Jisoo Jeon, Seunghwan Wi, Seong Jin Chang, Sumin Kim
Summary: Pervious concrete is an eco-friendly pavement material that allows water to percolate through its porous structure, solving environmental issues caused by impervious pavements in cities. The study shows that pervious concrete made with blast-furnace slag and amorphous metallic fibers has good water absorption and thermal conductivity, allowing faster evaporation of water and enhancing the evaporative cooling effect.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Sungwoong Yang, Hyeonseong Yuk, Beom Yeol Yun, Young Uk Kim, Seunghwan Wi, Sumin Kim
Summary: This study highlights the importance of improving building airtightness to reduce indoor fine dust concentration. By applying technologies such as sealing film, sealing lid, and padding, the experiment demonstrated a significant reduction in air leakage and indoor fine dust concentration.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Dimberu G. Atinafu, Beom Yeol Yun, Sungwoong Yang, Yujin Kang, Sumin Kim
Summary: This article reports on the thermal performance of a hybrid material supported n-alkane after one year of storage and 50 heating/cooling cycles. The hybrid material, consisting of metal-organic framework (MOF) and graphite, showed improved shape/thermal stability of tetradecane (TD) with high latent heat retention capacity, low leakage rate, and high PCM loading capacity, making it suitable for thermal management applications such as industrial waste heat recovery systems. The intermolecular interactions and capillary forces between the hybrid materials and TD provided high stability and compatibility, indicating the potential of the hybrid material in developing composite PCMs with comprehensive thermal characteristics.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Construction & Building Technology
Su-Gwang Jeong, Seunghwan Wi, Seong Jin Chang, Sumin Kim
Summary: In this study, a high heat storage capacity material was prepared by combining fine aggregates based on paraffinic shape-stabilized phase change materials with exfoliated graphite nanoplatelets as stabilizing additives. The resulting material displayed acceptable chemical stability, high thermal performance, and a considerable latent heat capacity, with peak temperatures lower than plain CSHC. Additionally, the material showed a time lag effect exceeding 720 min and resulted in an 8.18% maximum cooling energy reduction in energy simulation analysis.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Seunghwan Wi, Sungwoong Yang, Young Uk Kim, Yujin Kang, Sumin Kim
Summary: Traditionally, insulation materials were developed to prevent heat loss or gain in buildings, but they are flammable and emit harmful chemicals. This study evaluated the fire resistance performance of five insulation materials, with phenolic foam being the only one meeting the noncombustible grade criteria.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Thermodynamics
Yujin Kang, Ho Hyen Jo, Sungwoong Yang, Seunghwan Wi, Sumin Kim
Summary: This study proposed a process for evaluating indoor hygrothermal performance using two different simulations and investigated the hygrothermal performance of the indoor environment based on the hygrothermal behavior of walls. The results showed that high relative humidity and water content were found inside wall and floor layers, and improving hygrothermal performance by changing building materials resulted in decreased heat and moisture fluxes.
APPLIED THERMAL ENGINEERING
(2022)
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)
