Journal of Energy Storage
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2025
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IF 9.8
Fengyi Yang,Yimin Xuan,Xianglei Liu
Eutectic salts are widely utilized as latent heat storage materials in various thermal energy storage and management applications. However, developing efficient and accurate methods to predict the thermophysical properties of molten salts and guide their design remains a significant challenge. This study focuses on thermal properties, constructing an element gene feature database, and introducing an integrated machine-learning strategy for the design, screening, and evaluation of eutectic salts. Marginal contribution analysis reveals that the melting point is primarily influenced by features related to structural stability, while the fusion enthalpy is strongly associated with features affecting atomic bonding strength. Based on these insights, five novel eutectic salts are designed and experimentally validated. Among them, NaCl-NaF (66.0–34.0 mol%) exhibits a melting point of 683.7 °C and a fusion enthalpy of 588.8 J/g. High-temperature testing demonstrates that the prediction accuracies for the melting point and fusion enthalpy of the five salts are 94.49 % and 95.01 %, respectively. This study presents an effective and efficient approach for the precise targeted design of novel eutectic salts, offering expanded possibilities and options for the efficient utilization of renewable energy.
研究领域:
材料科学
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能源工程
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DOI
高影响因子
CARBON
·
2024
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IF 10.5
Jiarong Zhang,Long Yu,Ya'nan Zhao,Tianran Zhao,Yi'na Yang,Chunna Yu,Chang Zhao,Guangjian Xing
The urgent need for multifunctional, high-performance materials is critical in addressing environmental pollution and energy shortages faced by contemporary society. This research presents innovative NH 2 -MIL-88B/Ta 4 C 3 T X /graphene aerogels that exhibit exceptional capabilities in photocatalysis and thermal energy storage utilizing solar energy. Synthesized through a combination of hydrothermal and freeze-drying methods, these aerogels feature unique structural characteristics, including a hierarchical porous structure, low density, and a large specific surface area. Furthermore, the synergistic effects of NH 2 -MIL-88B, Ta 4 C 3 T X MXene, and the aerogel matrix contribute to remarkable physicochemical properties, such as high sunlight absorptivity and an optimal optical band gap that aligns well with the solar spectrum. These attributes enable the aerogels to photodegrade various dye and antibiotic drug solutions with high concentrations. The photodegradation efficiencies achieved were 75.57 % for Congo red, 61.56 % for methylene blue, and 58.57 % for tetracycline hydrochloride. Additionally, these aerogels exhibit significant adsorption capacities for various dyes and drugs. Moreover, when the phase change material polyethylene glycol is successfully integrated into the aerogels, they exhibit excellent thermal energy storage performance with leak-proof capabilities. A high photothermal conversion efficiency of 90.15 %, a phase enthalpy of 202.13 J g −1 , and an enthalpy efficiency of 98.55 % provide evidence for this. This work provides valuable insights into the development of multifunctional aerogels aimed at addressing the challenges of wastewater treatment and energy shortages.
研究领域:
环境科学
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材料科学
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能源科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2018
·Vol. 29
·期 17
·15241-15248
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IF 2.324
Ma Xiaochun,Liu Yanjun,Liu Han,Xu Bin,Zhou Jing,Xiao Fan
In this study, the microencapsulated phase change material with paraffin as core and inorganic TiO 2 shell was successfully synthesized by in situ hydrolysis and polycondensation of tetrabutyl titanate in a nonaqueous oil-in-water emulsion using formamide as aqueous phase. The chemical compositions, crystalline structure, morphology and microstructure of paraffin@TiO 2 microcapsules were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffractometer (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The thermal properties and thermal stability of the microcapsules were measured by differential scanning calorimeter (DSC) and thermo-gravimetric analyzer (TGA). FT-IR and XRD results proved that there was no chemical reaction between paraffin core and TiO 2 shell material. SEM images indicated that the paraffin@TiO 2 microcapsules showed a regular spherical shape with the average diameters of 2–5 µm with a smooth shell. SEM and TEM studies also confirmed the paraffin was fully encapsulated with TiO 2 . DSC analysis indicated that the microcapsules had similar phase change behaviors as those of pure paraffin. Typical sample froze at 52.24 °C with a latent heat of 110.42 J g −1 and melt at 60.41 °C with a latent heat of 107.54 J g −1 , of which the encapsulation ratio achieved to 54.58%. TGA results indicated the thermal stability of paraffin was improved by the protection of TiO 2 shell through the encapsulation.
研究领域:
材料科学
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能源工程
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DOI
高影响因子
Micro & Nano Letters
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2018
·Vol. 13
·期 8
·1132-1135
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IF 0.841
Dengwu Wang,Jianlong Si,Sude Ma
The provisions and applications of renewable energy have great supply–demand gap problem, and thermal energy storage (TES) is a very promising solution to fully utilise the renewable energy and covers off-peak periods. The application of solid–liquid phase change material (PCM) is an effective way of TES based on the techniques of encapsulation and emulsion, but the capsules are easily broken and the emulsions are easily phase separated as they were phase changed for many times, so some other techniques should be developed. The microemulsion PCM slurry was prepared by the combination uses of emulsifiers (i.e. sorbitan monooleate 80 and polyoxyethylene sorbitan monooleate 80), coemulsifier (i.e. butanol), distilled water, purified paraffin and inorganic salts (i.e. potassium chloride). The average particle size in the slurry was about 50 nm, and the slurry was homogeneous after centrifugal acceleration of 1800 g (i.e. ‘ g ’ is the gravity acceleration) for 5 min and phase change cycles for 1000 times. The latent heat of the slurry was 72.25 J g −1 and the paraffin content in the microemulsion was 43.8 wt %. The slurry can overcome the shortcomings of some other techniques and be expected to be widely applied in the TES.
研究领域:
能源科学
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材料科学
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DOI
高影响因子
Energy Technology
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2017
·Vol. 5
·期 12
·2309-2316
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IF 2.789
Zhao Wang,Jinhe Sun,Shaolei Xie,Guixiang Ma,Yongzhong Jia
The thermal properties of a binary system composed of lauric acid (LA) and nonanoic acid (NA) and its binary phase diagram were studied. To put this binary system into practice, the mixture containing 96 wt % of LA was selected, which has a phase-change temperature of 41 °C and a latent heat of 163 J g −1 , which is suitable for a domestic water heating application. Additionally, its thermal and chemical structure stability, thermal conductivity, degree of supercooling, and thermal reliability were investigated by using thermogravimetric analysis, FTIR spectroscopy, thermal conductivity analysis, the T -history method, and an accelerated thermal cycle test for 1000 melt/freeze cycles, respectively. The results of these tests indicated that the mixture has a remarkable thermal stability, a good chemical structure stability, no supercooling, and an excellent thermal reliability. Therefore, the mixture can be a potential phase-change material for thermal energy storage.
研究领域:
材料科学
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能源工程
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DOI
高影响因子
RSC Advances
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2016
·Vol. 6
·期 53
·48033-48042
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IF 3.289
Songyang Liu,Huaming Yang
This paper aimed to develop a novel form-stable composite phase change material (PCM) by infiltrating molten Na2SO4 into a mullite-corundum porous ceramic preform (M-PCP). Sufficient coal-series kaolinite (Kc), aluminum hydroxide, aluminum fluoride and graphite were mixed and subsequently heated in air at 1450 °C to produce M-PCP. The microstructure, thermal properties and thermal reliability of the composite PCMs were characterized by thermogravimetric and differential scanning calorimetry, X-ray diffraction and scanning electron microscopy. The results indicate that the M-PCP/Na2SO4 was 54.33 J g−1 at its melting temperature of 882.17 °C. Impregnation experiments and numerical simulation demonstrated high-temperature chemical compatibility and wettability between molten Na2SO4 and M-PCP. The M-PCP/Na2SO4 composite showed good thermal stability after 30 thermal shock cycles, and could potentially be used in the thermal energy storage field.
研究领域:
材料科学
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能源工程
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DOI
高影响因子
Materials
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2018
·Vol. 11
·期 10
·2011
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IF 2.467
Xiaolong Su,Shikui Jia,Guowei Lv,Demei Yu
Polyethylene glycol (PEG)/hybrid carbon foam (CF) phase change materials (PCMs) were prepared by integrating PEG into CF via dynamic-vacuum impregnation. The hybrid CF was first synthesized by mixtures of graphene oxide (GO) and carbon nanotubes (CNTs) with different volume ratios. The morphologies, chemical structures, thermal conductivities, shape-stabilization levels, and photo-thermal energy conversion levels of these composite PCMs were characterized systematically. The prepared composite PCMs exhibited good shape-stabilization levels and showed their original shapes without any PEG leakage. It was found that the polyethylene glycol/carbon foam with multi-walled carbon nanotubes (PEG/MCF) composite PCMs had a better shape-stable performance below the temperature of 250 °C, and the thermal conductivity of the PEG/MCF composite PCMs reached as high as 1.535 W/(mK), which was obviously higher than that of polyethylene glycol/carbon foam with single-walled carbon nanotubes (PEG/SCF, 1.159 W/(mK)). The results of the photo-thermal simulation tests showed that the composite PCMs had the ability to absorb light energy and then convert it to thermal energy, and the maximum thermal energy storage efficiency of the PEG/MCF composite PCMs and the PEG/SCF composite PCMs was 92.1% and 90.6%, respectively. It was considered that a valuable technique to produce high-performance composite PCMs was developed.Keywords:polyethylene glycol;hybrid carbon foam;phase change;thermal energy storage
研究领域:
材料科学
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能源科学
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产品关联
DOI
PubMed
高影响因子
Scientific Reports
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2018
·Vol. 8
·期 1
·1-11
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IF 4.122
Zhuang Xueheng,Zhang Ying,Cai Chang,Zhang Jing,Zhu Yuejin
Magnetic microencapsulated phase change materials (magnetic MicroPCMs) are hotly researched for their dual-functions with phase change and magnetic properties, which provided the new applications in fields of maneuverable phase change materials and infrared electromagnetic dual shield. A series of magnetic MicroPCMs samples are synthesized by polymerization and coprecipitation method and the chemical composition contained poly(MMA-MAA) @ n-octadecane modified by Fe 3 O 4 . In addition, the characterizations exhibit the excellent magnetic and phase change properties. The magnetic MicroPCMs samples present 20 emu·g −1 saturation magnetization with still high enthalpy of 132 J·g −1 , which fully illustrates that the magnetic MicroPCMs fulfill both application on thermal energy storage and magnetic control.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY CONVERSION AND MANAGEMENT
·
2013
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IF 2.775
Keping Chen,Xuejiang Yu,Chunrong Tian,Jianhua Wang
Polyurethane phase change material (PUPCM) has been demonstrated to be effective solid–solid phase change material for thermal energy storage. However, the high cost and complex process on preparation of PUPCMs with high enthalpy and broad phase transition temperature range can prohibit industrial-scale applications. In this work, a series of novel form-stable paraffin/PUPCMs composites ( n -octadecane/PUPCM, n -eicosane/PUPCM and paraffin wax/PUPCM) with high enthalpy and broad phase transition temperature range (20–65 °C) were directly synthesized via bulk polymerization. The composites were prepared at different mass fractions of n -octadecane (10, 20, 25, 30% w/w). The results indicated that the maximum encapsulation ratio for n -octadecane/PUPCM10000 composites was around 25% w/w. The chemical structure and crystalline properties of these composites were characterized by Fourier transform infrared spectroscopy (FT-IR), polarizing optical microscopy (POM), wide-angle X-ray diffraction (WAXD). Thermal properties and thermal reliability of the composites were determined using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). From DSC analysis, the composites showed a typical dual phase change temperature. The enthalpy for the composite with 25% w/w n -eicosane was as high as 141.2 J/g. TGA analysis indicated that the composites degraded at considerably high temperatures. The process of preparation of PUPCMs and their composites was very simple, inexpensive, environmental friendly and easy to process into desired shapes, which could find the promising applications in solar energy storage and building.
研究领域:
材料科学
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能源工程
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产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
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IF 4.1
Ci Ao,Suying Yan,Xiaoyan Zhao,Na Zhang,Yuting Wu
Stearic acid (SA) as a phase change material (PCM) can solve the problem of solar energy mismatch in time and space. However, the low thermal conductivity limits its development. To improve the thermal conductivity of SA in thermal energy storage systems , a novel SA/boron nitride (BN) composite PCM was prepared by melting the blending method. Different physical parameters were measured to assess the comprehensive performance of SA/BN. SA/BN thermal properties , microstructure, crystal structure, and chemical stability are characterized using different instrumentation. Results demonstrated that the prepared SA/BN shows a lower melting temperature and a higher solidification temperature compared to SA. Meanwhile, when the loading amount of SA is 88 wt%, the crystallinity and melting enthalpy was 84.36 % and149.34 J·g −1 . The thermal conductivity of SA/BN is 2.82 times higher compared to pure SA, which is 0.96 W·m −1 ·K −1 . Furthermore, SA/BN displays excellent cycling stability and thermal stability, the melting and solidification enthalpy changed by 2.89 % and 2.18 % for 50 cycles. The weight loss of SA/BN occurs between 200 and 350 °C, which means that the SA/BN-12 is suitable for building heating.
研究领域:
材料科学
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能源工程
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产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2023
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IF 13.1
Yangeng Li,Yan Kou,Keyan Sun,Jie Chen,Chengxin Deng,Chaohe Fang,Quan Shi
Phase change materials (PCMs) have attracted much attention in the field of solar thermal utilization recently, due to their outstanding thermal energy storage performance. However, PCMs usually release their stored latent heat spontaneously as the temperature below the phase transition temperature, rendering thermal energy storage and release uncontrollable, thus hindering their practical application in time and space. Herein, we developed erythritol/sodium carboxymethylcellulose/tetrasodium ethylenediaminetetraacetate (ERY/CMC/EDTA-4Na) composite PCMs with novel spatiotemporal thermal energy storage properties, defined as spatiotemporal PCMs (STPCMs), which exhibit the capacity of thermal energy long-term storage and controllable release. Our results show that the composite PCMs are unable to lose latent heat due to spontaneous crystallization during cooling, but can controllably release thermal energy through cold crystallization during reheating. The cold-crystallization temperature and enthalpy of composite PCMs can be adjusted by proportional addition of EDTA-4Na to the composite. When the mass fractions of CMC and EDTA-4Na are both 10%, the composite PCMs can exhibit the optical cold-crystallization temperature of 51.7 °C and enthalpy of 178.1 J/g. The supercooled composite PCMs without latent heat release can be maintained at room temperature (10–25 °C) for up to more than two months, and subsequently the stored latent heat can be controllably released by means of thermal triggering or heterogeneous nucleation. Our findings provide novel insights into the design and construction of new PCMs with spatiotemporal performance of thermal energy long-term storage and controllable release, and consequently open a new door for the development of advanced solar thermal utilization techniques on the basis of STPCMs.
研究领域:
材料科学
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能源技术
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Weizhun Jin,Qinghua Huang,Haimeng Huang,Zhengxiang Lin,Jinghui Zhang,Fangfang Zhi,Guohui Yang,Zhiyou Chen,Lei Wang,Linhua Jiang
A suspension of microencapsulated phase change material (MPCM) and thermal conductivity enhanced by MXene for thermal energy storage was prepared. The dispersion stability of MPCM-suspensions and MPCM-suspensions/MXene was investigated. The phase change behaviors of MPCM-suspensions and MPCM-suspensions/MXene were measured. The thermal conductivity and viscosity of MPCM-suspensions and MPCM-suspensions/MXene at various temperatures from 20 °C to 60 °C were tested. The thermal performance of MPCM-suspensions and MPCM-suspensions/MXene was evaluated by the temperature detection system. Results manifest that the mass ratio of isopropyl alcohol (IPA) to water of 42:58 can be used to prepare the MPCM-suspension with good dispersion stability and the MPCM-suspension containing MXene within 0.5 wt% can maintain the good dispersion stability. The latent heat of suspensions increases with the increase of MPCM and MXene has little effect on the latent heat of MPCM-suspensions. The thermal conductivity of suspensions decreases gradually and the viscosity increases dramatically with the increase of MPCM. MXene can significantly enhance the thermal conductivity of MPCM-suspensions and MXene within 0.3 wt% can decrease the viscosity of MPCM-suspensions. The temperature of the heated suspensions decreases gradually with the increase of MPCM. MXene can effectively increase the temperature of the heated MPCM-suspensions at early stage. The prepared MPCM-suspension/MXene has good dispersion stability and low viscosity, high thermal conductivity and latent heat, and can be applied as an efficient functional thermal fluid for thermal energy storage.
研究领域:
材料科学
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热物理学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）