Journal of Energy Storage
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2023
·
IF 9.4
Huan Liu,Lingyu Li,Xinxin Tian,Xiaodong Wang
To meet the requirement of multipurpose applications in infrared thermal camouflage and solar photothermal energy storage, we have developed a series of multifunctional composite films based on polyurethane (PU) as a flexible matrix and double-layered phase-change microcapsules as an additive. The double-layered microcapsules were first constructed by encapsulating n -docosane as a phase-change material in a titanium dioxide shell, followed by depositing a polyaniline (PANi) functional layer. Then, the microcapsules were incorporated into the PU matrix to form the composite films through in situ polycondensation . A high latent heat capacity of over 130 J g −1 was achieved by the microcapsules as a result of a high n -docosane loading. This can generate an effective thermal buffer for the composite films and thus endow them with a good thermal camouflage capability. The composite films also show good solar energy-storage performance thanks to their superior sunlight absorptivity derived from the PANi coating layer of the microcapsules. The composite films present a much higher surface temperature (68.6 °C) than pure PU film (41.9 °C) under simulated sunlight irradiation for 1488 s. In addition, the composite films exhibit a self-cleaning surface and high flexibility. Integrating the double-layered microcapsules and flexible PU matrix may provide an innovative strategy for developing flexible functional films for infrared thermal camouflage and photothermal energy storage applications .
研究领域:
材料科学
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能源存储
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2016
·
IF 6.198
Jie Yang,Guo-Qiang Qi,Yang Liu,Rui-Ying Bao,Zheng-Ying Liu,Wei Yang,Bang-Hu Xie,Ming-Bo Yang
Hybrid graphene aerogels (HGA) consisting of graphene oxide (GO) and graphene nanoplatelets (GNP) were prepared and introduced into polyethylene glycol (PEG) via vacuum impregnation, aiming at obtaining composite phase change materials (PCMs) with high thermal conductivity, outstanding shape-stabilization, high energy storage density, commendable thermal repeatability and the ability to light-to-heat energy storage. GO nanosheets formed a three-dimensional supporting network to keep the shape of PEG stable during phase change and GNP dispersed uniformity along the network structure of GO and thus a thermal conductive pathway was constructed. The incorporation of HGA remarkably enhanced the thermal conductivity and shape-stabilization of the composite PCMs. The PEG/HGA composite PCM with only ca. 0.45 wt% GO and ca. 1.8 wt% GNP, showed an enhanced thermal conductivity of 1.43 W/mK from 0.31 W/mK of pure PEG and an improvement of 361%, much higher than the improvement that can be achieved by solution or melt blending. Moreover, an energy conversion from light to heat was realized with the composite PCMs. Thus, this work provides a simple, green and environmentally friendly way to achieve simultaneous enhancement of the thermal conductivity, energy storage density and shape-stabilization of PCMs and realize light-to-thermal energy conversion.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 45
·2507162
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IF 19
Wenbo Tian,Yu Han,Fei Song,Jialin Fu,Ke Wang,Dongxing Song
A solid-state photothermal (PT) energy storage film based on norbornadiene (NBD) molecules has been developed, which converts solar energy into chemical energy through photoisomerization reactions and releases it as thermal energy upon heating. The optical absorption, energy storage properties, tensile strength, and thermal conductivity of the four NBD molecules are evaluated. Among them, the NBD4 film demonstrates the highest thermal storage capacity, reaching up to 202 J g −1 . In addition, the influence mechanism of different substituents and polystyrene (PS) concentrations on NBD is analyzed from a microscopic perspective. When integrated with photovoltaic (PV) cells, the solid-state PT energy storage films absorb UV light, lowering the PV cell temperature ≈5 °C while simultaneously storing UV photons as chemical energy. This results in ≈3% increase in overall system efficiency. After irradiation, the NBD film is additionally integrated with the thermoelectric generator (TEG). The stored energy is converted into electrical energy, enhancing thermoelectric conversion efficiency. The solid-state film proposed in this study effectively addresses the issues of poor thermal stability and leakage associated with liquid-based systems while remaining fully compatible with existing PV modules, thereby enhancing solar energy storage and heat release efficiency.
研究领域:
材料科学
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可再生能源
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光化学
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能量存储
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 49
·2303113
·
IF 13.3
Yan Gao,Jinjie Lin,Xiao Chen,Zhaodi Tang,Geng Qin,Ge Wang
2D MXene is highly preferred for photothermal energy conversion and microwave absorption. However, the aggregation issue, insufficient dielectric loss capacity, and lack of magnetic loss capacity for MXene severely hinder its practical applications. Herein, the authors propose multi-dimensional nanostructure engineering to electrostatically assemble 2D MXene and layered double hydroxides (LDH) derived from ZIF-67 polyhedron into a 3D hollow framework (LDH@MXene), and subsequently calcined to construct a Co nanoparticle-modified 3D hollow C-LDH@MXene framework to encapsulate a paraffin wax (PW) phase change material (PCM). The 3D hollow C-LDH@MXene framework not only prevents 2D MXene from aggregation but also contributes a high thermal energy storage density (131.04 J g −1 ). Benefiting from a 3D conductive network facilitating the rapid transport of photons and phonons from the interface to the interior and the synergistic localized surface plasmon resonance (LSPR) effect of MXene and Co magnetic nanoparticles, the C-LDH@MXene-PW composite PCM yielded a high photothermal storage efficiency of 96.52%. Besides, C-LDH@MXene-PW composite PCMs also exhibited efficient microwave absorption with a minimum reflection loss of −20.87 dB at 13.30 GHz with a matching thickness of only 2 mm. This distinctive design provides constructive references for the development of integrated composite materials for energy storage and microwave absorption.
研究领域:
材料科学
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纳米技术
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能源存储
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电磁材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）