RSC Advances
·
2023
·Vol. 13
·期 36
·24944-24954
·
IF 3.9
Lin Li,Tao Zeng,Hongyu Huang,Jun Li,Noriyuki Kobayshi,Xiaohu Yang
In this study, the influences of nano γ-Al2O3 on the thermal storage performance of LiCl were experimentally investigated. The XRD results show that a complex of lithium aluminium oxychloride (LiAlOCl2) was formed through the LiCl·H2O and γ-Al2O3 composites preparation process. The in situ diffuse reflectance infrared Fourier transform spectroscopy measurement reveals that the addition of γ-Al2O3 accelerated the hydration rate of LiCl composites, concentrated the spectrum utilization range, and promoted the desorption rate of physical adsorbed H2O and low-frequency structural –OH in the materials. The highest specific surface area of the composite is 34.5 times higher than that of pure LiCl. The addition of γ-Al2O3 can increase the conversion rate of LiCl·H2O to approximately 100% at the hydration time of 1 h and the addition content of γ-Al2O3 at 15 wt%. A maximum heat storage density (HSD) for the LiCl·H2O-γ-Al2O3 composite can reach 714.7 kJ kgLiCl·H2O−1 in 1 h when the addition content of γ-Al2O3 was 15%wt and its water uptake can reach 0.26 g g−1 in 1 h. It also can be found that the addition of Al2O3 in LiCl resulted in a decrease of the activation energy from 90.89 kJ mol−1 to 79.76 kJ mol−1. However, the thermal conductivity of the LiCl·H2O-γ-Al2O3 composite slightly decreased with the increase of nano γ-Al2O3 content.
研究领域:
材料科学
·
能源存储
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2022
·
IF 7.305
Xiangyang Liu,Zeyang Kang,Jiahao Zhao,Shaoxuan Huang,Ying Zhang,Maogang He
Coupling with supercritical power cycle can improve the thermal efficiency of the concentrated solar system. Design the suitable thermal storage medium is critical to the new coupling system. A new ternary eutectic salt with low cost was developed composed of NaCl , Na 2 CO 3 , and Na 2 SO 4 based on the calculation method of phase diagram , meeting the requirements of solar energy storage over 873 K. The eutectic point and composition of the designed salt were predicted to be 900 K and 50 mol% NaCl-35 mol% Na 2 CO 3 -15 mol% Na 2 SO 4 . The designed salt shows high specific heat capacity and phase-change enthalpy, and low cost, which indicates it has good thermal storage capacity. Composite phase change materials with multi-walled carbon nanotubes and graphene nanosheets which can enhance the thermal conductivity and heat capacity of designed salt were prepared. The effects of preparation methods on the thermophysical properties of the composite phase change materials were analyzed.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
KEY ENGINEERING MATERIALS
·
2016
·
IF 0
Yan Yang Yang,Hao Wang,Guo Lin Song,Guo Yi Tang
Phase change method is one of the efficient approach in resolving energy problem for solar energy storage. However, phase change materials seriously affect the heat storage system with low heat releasing and absorbing rate for poor thermal conductivity performance, which result in an inefficient thermal energy storage technology and uncertain economic perspective. In this paper, we prepared dual-functional phase change nanocapsules based on n-octadecane core and polypyrrole shell. Polypyrrole was employed to enhance the electric conductivity and thermal conductivity. The nanocapsules was characterized using Fourier transformed infrared spectrophotometer (FTIR), field emission scanning electron microscope (FESEM), differential scanning calorimeter (DSC), thermal gravimetric analyzer (TGA) and infrared thermal imaging. The results shows a good thermal behavior and high latent heat of 81.99J/g. The dual-fuctional phase change nanocapsules can be expected with a prospect of future profits in energy storage technology.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Nan Sheng,Wenlong Li,Shasha Lu,Renjie Liu,Songcen Shi,Hongzhi Liu,Chunyu Zhu
Phase change thermal storage represents a valid solution to the problem of renewable energy indirection. Metals have a high heat storage density and high thermal conductivity, making them a promising material for high-temperature phase change materials, yet limited in application by corrosion. As a solution, a boiling and cold pressing with subsequent calcination method was proposed for the development of shape-stabilized PCMs with Al as a phase change material and Al 2 O 3 as the matrix. A three-step preparation process was involved: (1) Generation of precursor shell layer on the surface of Al micropowder by boiling water treatment. This step was crucial for leakage prevention. (2) Stabilization and composite formation of the phase change material by cold pressing. In this step, we carefully studied the effect of pressure on the structural strength of composite phase change materials (PCCMs) and finally concluded that 10 MPa was the optimal cold pressure. (3) Formation of structurally stable PCCM was finalized by thermal oxidation treatment. The phase transition temperature and latent heat of phase transition of PCCM were 653°C and 68 J/g, respectively. Importantly, these phase transition properties remained consistent over 100 thermal cycles, indicating a good cycling property. These results inform the application of metallic Al in high-temperature thermal storage.
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
Energy Technology
·
2021
·Vol. 9
·期 7
·2001086
·
IF 3.631
Lin Li,Shijie Li,Tao Zeng,Lisheng Deng,Hongyu Huang,Jun Li,Noriyuki Kobayshi,Lin Liu,You Zhou
3D Graphene (3D-GF) modified with different additive concentrations (phytic acid [PA] and ascorbic acid [AA]) is developed and then combined with different LiOH contents by the hydrothermal method to obtain composite materials. It can be found that the addition of PA and AA will not destroy the carbon skeleton structure of 3D-GF. With increasing additive content, the thermal conductivities of modified 3D-GF first increase and reach their maximum values at 8 mg mL −1 . The modified 3D-GF with the highest thermal conductivity is selected to be combined with different LiOH contents. The addition of PA and AA can broaden the charging temperature range from 60–110 to 30–200 °C and improve the LiOH hydration rate and heat storage density. Compared with the PA-modified composite, the AA-modified composite shows smaller (about 7.6 nm) and more uniform LiOH·H 2 O particles (the particles size standard deviation of 3D-GF-AA-LiOH·H 2 O is 1.1503), a larger specific surface area (119 m 2 g −1 ), higher heat storage density (the highest value of 2763 kJ kg −1 for LiOH⋅H2O, which can be about 4.2 times of pure LiOH), and less influenced by the change of LiOH content (the thermal conductivity standard deviation of 3D-GF-AA-LiOH·H 2 O is 0.123).
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Zhuoni Jiang,Wenbin Yang,Fangfang He,Changqiong Xie,Jinghui Fan,Juying Wu,Kai Zhang
Environmentally friendly microencapsulated phase change materials (MEPCMs) with calcium carbonate (CaCO3) shells were modified with graphene oxide (GO), and the effects of GO content and methodology on MEPCMs were examined. The core–shell structure of MEPCMs and crystal structure of CaCO3 shells were confirmed by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and X-ray diffractometer (XRD). The thermal properties and stability of MEPCMs were investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), suggesting that the addition of GO contributed to improving the heat storage capacity and thermal stability of MEPCMs. When the GO content was 1.0 wt %, the encapsulation ratio of MEPCMs was as high as 73.19%, and the leakage rate was reduced by 89.6% compared to the MEPCMs without GO. Furthermore, the thermal conductivity and mechanical properties of GO modified MEPCMs were improved significantly. The considerable latent heat storage, thermal stability, thermal conductivity, leakage-prevention, and mechanical properties of GO modified paraffin@CaCO3 MEPCMs offer potential in green energy applications.
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
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Haifeng Jiang,Chen Yang,Jiaxing Song,Peng Cao,Jie Chen,Jiaxin Wang,Wenpeng Hong
The development of low-cost energy storage materials and the high-value utilization of fly ash are two major challenges that need to be addressed in the field of renewable energy. This work proposes an alkaline hydrothermal treatment method suitable for fly ash modification and prepares a porous bamboo leaf-like structured supporting material for encapsulating polyethylene glycol (PEG) phase change components. The results show that the prepared modified fly ash-based thermal storage material has an excellent latent heat performance, reaching 103.9 J/g, which is 2.24 times that encapsulated by ordinary fly ash. Meanwhile, the thermal conductivity of the modified composites is increased by 48.6%. After 100 heat storage/release cycles, the latent heat value of PEG/MFA decreases by only 0.028%. The reason is that the bamboo leaf-like structure of the modified fly ash support material provides a larger specific surface area. At the same time, the interaction between the support material and PEG promotes the effective adsorption and filling of the PEG phase change material. Leakage tests show that the maximum filling amount of PEG in the composite is 65 wt %. Furthermore, the prepared phase change heat storage material shows a good temperature regulation ability in simulated environment applications. This work sheds light on developing effective disposal of solid waste in power plants and its applications in the field of energy storage.
研究领域:
能源材料
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Sustainability
·
2024
·
IF 7.1
Ting Yan,Xiao-Le Chang,Ying-Jie Huo,Zhi-Hui Li,Wei-Guo Pan
Designing and synthesizing the excellent heat storage and photothermal integrated composite phase change materials (PCMs) is an effective strategy for solar energy utilization. This work focuses on two kinds of CuS (cuboidal and 3D flower-shaped) with different morphology were designed as substrates and photothermal materials, and PA/F–CuS and PA/C–CuS composite PCMs have been prepared by melt-blending and vacuum impregnation method. Through SEM and pore structure characterization as well as leakage testing, it is proved that 3D layered flower-shaped CuS not only exposes the large specific surface area and rich adsorption sites, but also 2D thin layers can perform multiple reflections to improve the utilization rate of solar energy. The flower-shaped CuS is more suitable for the supporting material. Noteworthy, the latent heat of PA/F–CuS can reach 226.3 J/g, and the thermal conductivity is 0.3447 W/(m·K). Furthermore, compared with pure PA, the photothermal property of PA/F–CuS increased by 49.22–84.59%, and the photothermal conversion efficiency can reach 70.3%. This work provides an innovative idea for the design and manufacture of composite PCMs related to medium and low temperature solar energy storage, and has broad application potential in the field of thermal energy storage such as solar energy utilization and building insulation materials.
研究领域:
材料科学
·
太阳能利用
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Xuanxuan Wang,Yuting Wu,Chuan Li,Yuanwei Lu,Cancan Zhang,Ming Hong
As one of classic organic compounds, pentaerythritol (PE) has been reported to have two phase-change processes with one solid-solid transition and other solid-liquid transition. To utilize these two phase-change enthalpies and avoid the liquid leakage over heat storage process, this work for the first time proposes to encapsulate PE with use of silicon dioxide (SiO 2 ) as a shell substance through a so-called so-gel technology. The microstructure characterization and thermoproperties as well as the cycling performance of the PE- SiO 2 composite are detailedly investigated. The results showed that PE could be successfully covered by SiO 2 to form a spherical core-shell structure. Such an encapsulation has a mean size of 0.3 μm and an encapsulated rate of over 77.8 %. Due to the involvement of two phase-transition stages, the latent heat of the PE- SiO 2 composite reached to 255 kJ/kg, which is higher than other organic microencapsulations. In addition, the thermal conductivity is largely enhanced by adjusting the ratio of SiO 2 . For a given SiO 2 ratio of 77.8 %, the thermal conductivity of PE-SiO 2 composite is 0.93 W/m·K, 36.8 % higher than that of pristine PE. Apart from these, the results also indicated that the composite achieves excellent thermal cycling performance. After one hundred repeated heating-cooling cycles, the latent heat of the PE- SiO 2 composite decreases by less than 5 %, demonstrating that this composite material has a large potential for application in the field of thermal energy storage at low and medium temperatures.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2024
·
IF 8.3
Yanyun Li,Yu Fan,Ziyu Liu,Junying Zhang,Jue Cheng,Qingsong Lian
At present, the demand for green energy has reached a new height in history, and thermal energy storage technology has been widely used to reduce energy consumption. It is still a challenge to develop bio-based polymeric form-stable phase change materials (FSPCMs) with high enthalpy value and thermal conductivity (TC), short curing time, and multifunctional properties. This work not only exploited a series of adjustable and photo-curable comb/bottle brush bio-based epoxy resin/beeswax (bw) FSPCMs with the above superiorities, but also revealed the effects of cross-linking density on the energy storage capacity and encapsulation rate of the FSPCMs. As a result, the optimal system can encapsulate the maximum amount of bw (60 wt%) and obtain the highest enthalpy value (142.1 J/g) with only 0.5% enthalpy loss. Through further introducing the optimal curing system into the copper (Cu) foam, the electromagnetic interference shielding property, TC, tensile strength, and photo-thermal conversion efficiency of the final composite (modified by Cu of 95% porosity) can reach 110 dB, 2.387 W m −1 K −1 , 2.81 MPa, and 80%, respectively, and the enthalpy value (84.2 J/g) is still satisfactory. This study can provide theoretical guidance for the structural design of reliable fast photo-curable bio-based polymeric FSPCMs with excellent phase change performances and multifunctional properties.
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
COMPOSITES SCIENCE AND TECHNOLOGY
·
2023
·
IF 9.1
Gang Zhou,Ling Li,Seul-Yi Lee,Fei Zhang,Junwen Xie,Bin Ye,Wenhui Geng,Kuikui Xiao,Jong-Hoon Lee,Soo-Jin Park,Zhi Yang,Chengzhe Huang,Yinhang Zhang
The utilization of phase-change materials (PCMs) has garnered great interest in purposes of energy storage and thermal management due to its lightweight, high-energy efficiency, and cost-competitiveness. However, the intrinsic limitations of low thermal conductivity and leakage in PCMs impede their usage in high-power-density energy harvesting applications. Here, we designed multifunctional phase-change composites (PCCs) via a dual-encapsulation strategy to realize all-climate thermal managements for lithium-ion batteries. For PCMs, polyethylene glycol was interpenetrated into porous polyurethane network (PEG@PU) to enclose a considerable amount of PEG. Then, the PCMs were infiltrated into the highly oriented graphite frameworks (HOGF). A series of processes enabled to form multi-layered structures as well as alleviate the leakage issue of PEG, and thereby improving the thermal storage ability. The so-obtained PCCs exhibited excellent electrothermal properties (134.9 °C at 1.8 V) and high electromagnetic interference performances (larger than 90 dB). These findings presented that the thermal managements of PCCs can be utilized as active preheating or passive cooling system in a battery thermal management system for the all-climate demands.
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
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Yuandong Shen,Junyi Niu,Yuzhu Luan,Wei Liu,Haobin Qiu,Xuenong Gao
Heat accumulators using latent heat storage are commonly used in solar energy storage systems. Potassium aluminum sulfate dodecahydrate (Alum) is an inexpensive phase change material , but the high phase change temperature limits its application in heat accumulator. To address this limitation is controlling the melting temperature of Alum. In this study, Alum-urea mixtures were first developed by adding 10 wt% urea. Modified phase change materials (MPCM) without phase separation and supercooling were developed by adding NiSO 4 ·6H 2 O and xanthan gum to the Alum-urea mixture. Composite phase change materials (CPCM) with high thermal conductivity were developed by loading MPCM in expanded graphite . The melting temperature of the Alum-urea mixture was 72.52 °C with 10 wt% urea content, which was 21.4% lower compared to the Alum. The MPCM still has a high phase change enthalpy (157.7 J·g −1 ) and ignorable subcooling degree (0.8 °C). The thermal conductivity of CPCM is increased by 16 times, and it has good photothermal conversion ability. The CPCM holds significant promise for applications in latent heat energy storage.
研究领域:
能源材料
·
太阳能技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）