Micro/nano-encapsulated phase-change materials (ePCMs) for solar photothermal absorption and storage: Fundamentals, recent advances, and future directions

Albdour, Samah A.; Haddad, Zoubida; Sharaf, Omar Z.; Alazzam, Anas; Abu‐Nada, Eiyad

doi:10.1016/j.pecs.2022.101037

Cited by 65 publications

(12 citation statements)

References 450 publications

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“…4 Compared to high-temperature energy storage, it does not require sacrificing much area to concentrating sunlight or overly tight thermal insulation. 5 Nevertheless, conventional phase change materials possess inherent limitations that hinder their practical applications. 6 Over the past few decades, various types of solid−liquid phase change materials (PCMs) have been used in the medium temperature range, such as hydrate salts, 7 eutectics, 8 and sugar alcohols.…”

Section: Introductionmentioning

confidence: 99%

“…Compared to low-temperature energy storage, its higher grade of heat allows for a wider range of applications, such as high-temperature sterilization, high-temperature hot water, sea water distillation, or combined with a heat engine for efficient power output for most everyday needs, etc . Compared to high-temperature energy storage, it does not require sacrificing much area to concentrating sunlight or overly tight thermal insulation . Nevertheless, conventional phase change materials possess inherent limitations that hinder their practical applications …”

Section: Introductionmentioning

confidence: 99%

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Oriented High Thermal Conductivity Solid–Solid Phase Change Materials for Mid-Temperature Solar-Thermal Energy Storage

Dai

Gao

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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As the global energy crisis intensifies, the development of solar energy has become a vital area of focus for many nations. The utilization of phase change materials (PCMs) for photothermal energy storage in the medium temperature range holds great potential for various applications, but their conventional forms face several challenges. For instance, the longitudinal thermal conductivity of photothermal PCMs is inadequate for effective heat storage on the photothermal conversion surface, and there is a risk of leakage due to repeated solid–liquid phase transitions. Here, we report a solid–solid phase change material, tris(hydroxymethyl)aminomethane (TRIS), which has a phase change temperature of 132 °C in the medium temperature range, enabling high-grade and stable solar energy storage. To overcome the low thermal conductivity problem, we propose a large-scale production of oriented high thermal conductivity composites by compressing a mixture of TRIS and expanded graphite (EG) using the pressure induction method to create in-plane highly thermally conductive channels. Remarkably, the resulting phase change composites (PCCs) exhibit a directional thermal conductivity of 21.3 W/(m·K). Furthermore, the high phase change temperature (132 °C) and large phase change entropy (213.47 J/g) enable a large-capacity high-grade thermal energy to be used. The developed PCCs, when combined with selected photo-absorbers, exhibit efficient integration of solar-thermal conversion and storage. Additionally, we also demonstrated a solar-thermoelectric generator device with an energy output of 93.1 W/m2, which is close to the power of photovoltaic systems. Overall, this work provides a technological route to the large-scale fabrication of mid-temperature solar energy storage materials with high thermal conductivity, high phase change enthalpy, and no risk of leakage, and also offers a potential alternative to photovoltaic technology.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Oriented High Thermal Conductivity Solid–Solid Phase Change Materials for Mid-Temperature Solar-Thermal Energy Storage

Dai

Gao

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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“…Solar energy is clean, renewable, and abundant and is recognized as an ideal energy source to replace traditional fossil fuels. − Through photovoltaics, photothermal conversion, and photochemical processes, solar energy can be converted into various energy sources such as electricity, fuel, and heat. − Among these technologies, photothermal conversion is one of the most direct and efficient methods to utilize solar energy, which has been widely used in seawater desalination systems, environmental purification, tumor therapy, and so on. , However, photothermal conversion systems are usually mismatched in space and time due to the intermittent and low energy flux density of solar irradiation, which makes it impossible to obtain sufficient and stable heat. , Endowing PCMs with the ability of photothermal conversion can effectively resolve the above mismatch problem because thermal energy storage and release through the process of photothermal conversion can be flexibly regulated by the phase transition process of PCMs . Thus, photothermal PCMs have gradually attracted the attention of many researchers. − Currently, there are two types of materials that have the ability to absorb light energy and convert it into heat: organic dyes and inorganic particles. Organic photothermal conversion dyes include azo dyes, anthraquinone dyes, polyaniline dyes etc., which can be easily constructed into the polymer network via covalent bonds, avoiding the degradation of the mechanical properties of materials due to the phase separation effect .…”

Section: Introductionmentioning

confidence: 99%

Reprocessable, Photothermal Phase Change Material-Based Hybrid Polymeric Networks for Solar-to-Thermal Energy Storage

Wei

Liu

Zhao

et al. 2023

Ind. Eng. Chem. Res.

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Polymeric photothermal phase change material composite (PPCMC) networks with excellent reprocessability, high latent heat, and intrinsic network stability have the great advantages of solar energy storage and conservation and environmental protection resulting from the covalent crosslinking network structure and long-life inorganic photothermal agents. Herein, the reprocessable PPCMCs were successfully prepared by introducing the reactive diisocyanate-terminated poly(ethylene glycol) (PEG) and multiple amino-functionalized carbon black (CB)that serve as the phase change component and the photothermal curing agent, respectively. The phase change properties, mechanical strength, and photothermal efficiency of PPCMCs can be tuned by the chain length of PEG and the loading content of CB and the catalyst. PPCMCs possess the largest latent heat of 126.7 J/g, the highest photothermal conversion efficiency of 89.0%, superior shape stability even at 140 °C, high thermal stability beyond 300 °C, and reprocessing ability by introducing the catalyst of the transcarbamoylation reaction. Also, the PPCMCs exhibit high thermal reliability after accelerated thermal cycling and reprocessing, featuring nearly consistent chemical and crystalline structures, latent heat, phase change temperature, and photothermal properties. This synthetic strategy provides an alternative to obtain multifunctional PPCMCs due to the enhanced interfacial interaction between inorganic particles and the polymer matrix via covalent linkages.

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“…It should be noted that the use of phase change micro/nanocapsule suspensions as a novel fluid for thermal energy storage and transfer has been demonstrated to be effective. 33 For example, in a direct absorption solar collector, solar radiation penetrates the heat transfer fluid and is absorbed directly by the phase change micro/nanocapsules. 34 Despite these findings, there is a lack of research regarding the photothermal conversion properties of sugar alcohol nanocapsule suspensions.…”

Section: Introductionmentioning

confidence: 99%

Enhanced thermal conductivity and photothermal conversion efficiency of MXene-doped sugar alcohol nanocapsules for medium-temperature solar utilization

Chen

et al. 2023

Sustainable Energy Fuels

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Micro/nano-encapsulated phase-change materials (ePCMs) for solar photothermal absorption and storage: Fundamentals, recent advances, and future directions

Cited by 65 publications

References 450 publications

Oriented High Thermal Conductivity Solid–Solid Phase Change Materials for Mid-Temperature Solar-Thermal Energy Storage

Oriented High Thermal Conductivity Solid–Solid Phase Change Materials for Mid-Temperature Solar-Thermal Energy Storage

Reprocessable, Photothermal Phase Change Material-Based Hybrid Polymeric Networks for Solar-to-Thermal Energy Storage

Enhanced thermal conductivity and photothermal conversion efficiency of MXene-doped sugar alcohol nanocapsules for medium-temperature solar utilization

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