Journal of Energy Storage
·
2025
·
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
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2022
·
IF 8.907
Yang Tian,Xianglei Liu,Li Zhang,Qinyang Luo,Qiao Xu,Haichen Yao,Fengyi Yang,Jianguo Wang,Chunzhuo Dang,Yiming Xuan
The eutectic salt as latent heat storage (LHS) media has been widely employed in various fields, but its thermophysical properties are difficult to be predicted accurately. Here, a prediction model of thermophysical properties of eutectic salts based on the backpropagation (BP) artificial neural network method combined with bio-inspired algorithms (polar bear optimization (PBO) or genetic algorithm (GA)) is proposed. The average prediction error of melting temperature of 26 chlorine eutectic salts is the lowest by employing the BP-PBO algorithm, which is reduced by 42 % and 38 % compared to the BP algorithm and BP-GA, respectively. The advantage of BP-PBO is more obvious in predicting phase change enthalpy of chlorine eutectic salts, whose average error decreases by 71 % and 68 % compared with BP and BP-GA, respectively. For more intuitive comparisons, experiment measurements, BP-PBO, phase diagram , and molecular dynamics are used for characterizing thermophysical properties of fabricated KCl-LiCl eutectics. Again, BP-PBO demonstrates extremely accurate prediction performance and unique advantage of avoiding the difficulty of choosing appropriate phase equilibrium data or potential functions. The work provides accurate and fast prediction methods of thermophysical properties of chlorine eutectic salts and guides their designs for different applications.
研究领域:
材料科学
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能源工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiaoyan Yao,Yunwei Chang,Heng Gu,Jiangrong Guo,Deqiu Zou
The development of thermal storage material is crucial for the utilization of thermal energy. At present, eutectic salt/ceramic composite has been widely studied as latent heat storage material, however, its thermal conductivity is low and its latent heat per unit volume is still not ideal, despite its high latent heat per unit mass. Herein, a metallic microcapsule with high thermal conductivity and latent heat per unit volume is introduced to improve the above properties. Using MgO as the support material, metallic microcapsule (Sn@Void@SiO 2 ) and eutectic salt (LiNO 3 -NaCl) with almost the same temperature range as phase change material, metallic microcapsule/eutectic salt/ceramic composite was prepared by cold-pressure sintering method. The result shows that the best performance of metallic microcapsule/eutectic salt/ceramic composite was achieved with the addition of 30 wt% Sn@Void@SiO 2 instead of MgO, the latent heat per unit volume and per unit mass of the composite are 237.1 J/cm 3 and 117.9 J/g, which are improved by 56.72 % and 15.48 % respectively. And the thermal conductivity of the composite was improved by 63.79 %, from 0.58 W/(m·K) to 0.95 W/(m·K). Further, the addition of a small amount of Sn to metallic microcapsule/eutectic salt/ceramic composite can not only increase its latent heat but also improve its thermal conductivity as Sn fills the pores inside the composite after melting. The result showed that the thermal conductivity of the composite was increased by 155.17 % than that of eutectic salt/ceramic composite when Sn was added at 5 wt%. Finally, thermal cycle results showed that composites have high thermal reliability and proved high thermal cycling stability of metallic microcapsule prepared by “double-layer coating, sacrificial inner layer” method.
研究领域:
材料科学
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热能工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF PHARMACEUTICS
·
2015
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IF 3.65
Pin Dong,Ling Lin,Yongcheng Li,Zhengwei Huang,Tianqun Lang,Chuanbin Wu,Ming Lu
The purpose of this work was to explore in - situ synchrotron wide-angle X-ray diffraction (WAXD) as a rapid and accurate tool to screen and monitor the formation of cocrystal/salts during heating. The active pharmaceutical ingredients (caffeine, carbamazepine and lamotrigine) were respectively mixed with the coformer (saccharin), and then heated by the hot stage. Real-time process monitoring was performed using synchrotron WAXD to assess cocrystal formation and subsequently compared to differential scanning calorimetry (DSC) measurements. The effect of heating rates and cocrystal growth behavior were investigated. Synchrotron WAXD was fast and sensitive to detect cocrystal formation with the appearance of characteristic diffraction rings, even at the heating rate of 30 °C/min, while DSC curves showed overlapped peaks. Unlike the indirect characterization of DSC on endo/exothermic peaks, synchrotron WAXD can directly and qualitatively determine cocrystal by diffraction peaks. The diffraction intensity–temperature curves and the corresponding first-derivative curves clearly exhibited the growth behavior of cocrystal upon heating, providing useful information to optimize the process temperature of hot melt extrusion to continuously manufacture cocrystal. The study suggests that in - situ synchrotron WAXD could provide a one-step process to screen cocrystal at high efficiency and reveal the details of cocrystal/salts growth behavior.
研究领域:
药学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Hui Dang,Zhidong Chang,Xue Wu,Sihang Ma,Yifei Zhan,Na Li,Wenbo Liu,Wenjun Li,Hualei Zhou,Changyan Sun
Effectively extracting lithium at a relatively low temperature from the slag produced by the pyrometallurgical treatment of spent lithium-ion batteries remains a great challenge, which limits the acquirement of lithium. Herein, we proposed a eutectic system to roast slag at a lower temperature based on sodium sulfate–sodium chloride (Na 2 SO 4 –NaCl) binary eutectic salts. The optimal roasting conditions are as follows: the slag was roasted at 750 °C with a (SO 4 2– +Cl – )/Li + molar ratio of 5:1 for 120 min. Followed by aqueous leaching 5 min at room temperature with a water/roasted samples mass ratio of 30:1, it can get 97.07% lithium extraction efficiency.
研究领域:
冶金学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Huiyan Wu,Hailong Huang,Lingzhi Cao,Yiyang Liu,Jianxing Dai,Cuilan Ren,Min Ge,Yuan Qian,Shuxian Hu,Xiaobin Fu,Hongtao Liu
In this study, it was demonstrated that Na+ ionic doped crystals could be formed during the solidification of FLiNaK melts. The ionic adulterating behavior between Li+, Na+, and K+ ions was investigated in detail by using various 1D/2D solid-state NMR methods and theoretical calculations. 2D 19F–23Na and 19F–7Li HETCOR NMR showed that the Na+ ions could be doped into LiF and KF crystals to generate new adulterating phases. Furthermore, the doped ionic Na+ ions exhibited different dynamics in LiF and KF crystals, which is correlated to the bonding length of the lattice and the Na–F coordinated interactions. This study provides more insights into the ionic doped crystal phase formation in such simple alkali metal fluorides, which may be of greater significance in the application as optical devices.
研究领域:
材料科学
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Refrigeration
·
2024
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IF 3.5
Xinlong Chen,Yutang Fang,Zhengguo Zhang,Xuenong Gao,Junyi Niu
Attention to the use of phase change materials (PCMs) in cold chain transportation has increased in recent years. In this work, a form-stable composite phase change material (CPCM) prepared by a novel eutectic salt (Na 2 SO 4 ·10H 2 O-MgSO 4 ·7H 2 O H 2 O) PCM composite with modified expanded graphite (MEG) was investigated. The hydrophilicity of expanded graphite (EG) and its compatibility with the eutectic salts were improved by coating SiO 2 . The results showed that microstructure of the EG was maintained after modification, and adsorption of the PCM by the MEG was 55.23 wt% higher than that of the EG. The CPCM with 20 wt% MEG exhibit a high enthalpy of 180.8 J/g, the phase transition temperature of −5.6 °C and a high thermal conductivity of 5.183 W/(m·K). The thermal conductivity of CPCM was 8 times as large as that of the PCM. Moreover, the thermal performance of the CPCM was small change after 200 thermal cycling, exhibiting good thermal cyclic reliability. Besides, a potential application test of the form-stable CPCM was performed through a low temperature insulation box. It showed that form-stable CPCM can control sudden temperature fluctuation and maintain stable temperature for longer time inside the insulation box.
研究领域:
材料科学
·
热能工程
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化学工程
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物流与运输
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2020
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IF 4.608
Tingrui Xu,Xuejiao Li,Lili Guo,Feng Wang,Zhongfeng Tang
First principle molecular dynamics (FPMD) simulations in combination with experimental measurements are applied to investigate the phase transition behavior of NaCl-MgCl 2 eutectic salt from 823 to 573 K. First, the essential phase transition indexes of thermal expansion coefficient, density, melting point, and enthalpy of fusion for NaCl-MgCl 2 eutectic obtained by simulations and experiments are in good agreement with each other. Second, the micro-structural characteristics during phase transition are depicted by the temperature dependences of angular distribution function, radial distribution function and coordination number. The structural evolution of NaCl-MgCl 2 eutectic is illustrated from the rearrangement of polyhedral M g C l n 2 - n clusters, and it is founded that high and low temperature are conducive to the formation of 4-fold and 6-fold coordinated structure, respectively. Third, the ionic self-diffusion coefficients for NaCl-MgCl 2 eutectic are predicted and concluded that Mg 2+ behaves like a complex than as a free ion resulting in less diffusivity. Therefore, the shear viscosities of molten NaCl-MgCl 2 as well as the corresponding pre-exponential factor and activation energy are evaluated considering the solvodynamic mean radius of all the diffusive particles. Ultimately, two figures of merit for molten NaCl-MgCl 2 are deduced to evaluate the heat-transfer and heat-loss performance by integrating multiple thermal properties including density, viscosity, specific heat capacity and thermal conductivity. Overall, these simulation results are in satisfactory agreement with available reference data, indicating that the FPMD simulations work extremely well in predicting the thermophysical and structural properties of NaCl-MgCl 2 , which also provide insights for the applications of binary chloride salts in thermal energy storage.
研究领域:
材料科学
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计算化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 6
·062511
·
IF 4.316
Da-Wei Yang,Shi-Lin Jiang,Ya-Lan Liu,Tai-Qi Yin,Mei Li,Lin Wang,Wan Luo,Zhi-Fang Chai,Wei-Qun Shi
Studying the electrodeposition mechanism of La3+ in LiCl-KCl salt is extremely important for understanding the main characteristics of the deposition of An/Ln in the pyrochemical reprocessing of spent nuclear fuels. In this work, cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and Tafel methods were employed to investigate the electrodeposition mechanism and kinetic processes of La3+ on Al, Ga and Al-Ga alloy cathodes in LiCl-KCl eutectic salt at the temperature range of 723−873 K. The EIS spectra were measured by applying a minimum overpotential near the equilibrium potential, and the suitable equivalent circuits were fitted. The values of exchange current density (i0) calculated by EIS ranged from 0.078 to 0.42 A cm−2. Finally, Al2Ga2La ternary and Al3La, Ga6La binary alloys were obtained by the potentiostatic electrolysis, which were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS).
研究领域:
材料科学
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电化学工程
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核能技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Dewei Wang,Zhaorui Sun,Xinliang Han
The exploration of a non-corrosive and sustainable strategy to produce thin graphene-like porous carbon nanosheets with large specific surface area for electrochemical energy storage applications is highly desired yet a huge challenge. Herein, we report a eutectic salt induced self-activation process for the synthesis of a serials of porous carbon nanosheets with well-controlled microstructures just by simply changing the type of eutectic salt. The experiment results illustrated that the in-situ formed Na 2 CO 3 , which is usually “inert” when serves as a chemical activation reagent at relatively low temperature, display a significant enhanced chemical activation in eutectic salt medium. Specifically, thin graphene-like porous carbon nanosheets with a large specific surface of 1739.5 m 2 /g can be obtained in CsCl-NaCl eutectic salt. When acts as a cathode for Zn-ion hybrid supercapacitors (ZSCs), a high specific capacity of 169.1 mAh/g (at 0.1 A/g), large specific energy of 62.24 W h kg −1 (at an ultrahigh specific power of 16 kW g −1 ) and cyclic stability of 91.7 % after 10,000 cycles. In addition, a quasi-solid-state ZSC device, which can freely realize series to increase the working voltage, demonstrated its hold a potential for practical application. This strategy combines the advantages of the in-situ chemical activation with the advantages of the eutectic salt medium, which offers an alternative way for the producing of various functional nanocarbons for a variety of applications including electrochemical energy storage.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
ENERGY
·
2024
·
IF 9
Chunlei Wu,Qing Wang,Xinmin Wang,Shipeng Sun,Yuqi Wang,Shuang Wu,Jingru Bai,Hongyu Sheng,Jinghui Zhang
Eutectic salts, a promising thermal storage material for the next generation of concentrating solar power plants , have attracted extensive attention. Its thermal performance is a crucial factor affecting the efficient utilization of efficient solar energy. Utilizing NaCl–KCl–LiCl as the phase-change material and introduced Al 2 O 3 nanoparticles to enhance thermal conductivity , thus study explores potential mechanisms for improving heat transfer and thermal storage performance. Experimental and molecular dynamics results consistently showed that doping Al 2 O 3 nanoparticles significantly increased the specific heat and thermal conductivity of eutectic salt. Specifically, at a nanoparticle content of 1.0 wt%, liquid-specific heat and thermal conductivity increased by 44.58 % and 21.43 %, respectively. Experimental and simulation results mutually validated a consistent upward trend. However, nanoparticle introduction unavoidably led to increased viscosity , with a maximum increase of 32.15 %. Subsequently, detailed simulation analysis of a shell-and-tube heat storage unit for composite materials highlighted that heat conduction rate was influenced by both natural convection and heat conduction. Therefore, viscosity and thermal conductivity should be simultaneously considered in the system applications. This scientific strategy holds promise for widespread application of eutectic salts in solar thermal energy storage, further promoting sustainable development of renewable energy.
研究领域:
材料科学
·
能源工程
·
计算模拟
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2022
·
IF 8.907
Zeyang Kang,Sihan Huang,Xiangyang Liu,Ying Zhang,Maogang He
Suitable eutectic point, high specific heat capacity , large latent heat, low cost and other factors were considered to design a new type of molten salt in this work, and composite phase change materials (CPCM) were prepared for the utilization of solar energy by thermal energy storage . The designed molten salt is NaF-Na 2 CO 3 -Na 2 SO 4 eutectic salt ( x NaF = 36.29 mol%, x Na 2 CO 3 = 29.93 mol% and x Na 2 SO 4 = 33.78 mol% with melting temperature of 936.1 K), high liquidus specific heat capacity (1.76 J·(g·K) −1 ) and high latent heat (342.9 J·g −1 ), expanded graphite (EG) is used for improving structural stability and thermal conductivity , and graphene nanoplatelets (GNPs) is used for further improvement on thermal conductivity. The thermophysical properties of base salt and the effects of EG and GNPs nanomaterials additives on the thermophysical properties of the composite were investigated, especially the greatly increased effect on thermal conductivity (1120 % enhancement for EG-PCM and 1109 % enhancement for EG-GNPs-PCM). The prepared NaF-Na 2 CO 3 -Na 2 SO 4 eutectic base salt and EG-PCM, EG-GNPs-PCM composites have a promising application prospect in the high-temperature energy storage.
研究领域:
材料科学
·
能量存储
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太阳能
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）