Nanoconfinement of phase change materials within carbon aerogels: phase transition behaviours and photo-to-thermal energy storage

Huang, Xinyu; Xia, Wei; Zou, Ruqiang

doi:10.1039/c4ta04605f

Cited by 136 publications

(67 citation statements)

References 63 publications

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“…The thermal conductivities of organic PCMs and salt hydrates range from ≈0.1 to 1 W m −1 K −1 , and those of inorganic salts range from ≈0.5 to 5 W m −1 K −1 . [26] There are generally two approaches to tuning k PCM : filling additives [29] or encapsulating into porous matrixes or shells [30] with high thermal conductivities. Extensive available reviews related to the thermal conductivity enhancement of PCMs have been reported, which summarized the strategies for improving thermal conductivities in detail.…”

Section: Thermal Conductivity Enhancement Of Pcmsmentioning

confidence: 99%

Engineering the Thermal Conductivity of Functional Phase‐Change Materials for Heat Energy Conversion, Storage, and Utilization

Yuan

Shi

Aftab

et al. 2019

Adv Funct Materials

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275

136

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Thermal energy storage technologies based on phase‐change materials (PCMs) have received tremendous attention in recent years. These materials are capable of reversibly storing large amounts of thermal energy during the isothermal phase transition and offer enormous potential in the development of state‐of‐the‐art renewable energy infrastructure. Thermal conductivity plays a vital role in regulating the thermal charging and discharging rate of PCMs and improving the heat‐utilization efficiency. The strategies for tuning the thermal conductivity of PCMs and their potential energy applications, such as thermal energy harvesting and storage, thermal management of batteries, thermal diodes, and other forms of energy utilization, are summarized systematically. Furthermore, a research perspective is given to highlight emerging research directions of engineering advanced functional PCMs for energy applications.

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Section: Thermal Conductivity Enhancement Of Pcmsmentioning

confidence: 99%

Engineering the Thermal Conductivity of Functional Phase‐Change Materials for Heat Energy Conversion, Storage, and Utilization

Yuan

Shi

Aftab

et al. 2019

Adv Funct Materials

Self Cite

275

136

View full text Add to dashboard Cite

show abstract

“…However, these efforts would certainly lessen the energy storage density of PCMs due to the presence of inactive mass . At present, nanoconfinement technologies have attracted a lot of interest and present a new opportunity for considerable refinement in the thermophysical properties of PCMs while sustaining their energy storage capacity . There are several advantages associated with nanoconfinement like small domain size, large surface area, diverse surface functionalities, controlled volume expansion, reduced reactivity with the external environment, and high heat transfer rate.…”

Section: Introductionmentioning

confidence: 99%

The micro‐/nano‐PCMs for thermal energy storage systems: A state of art review

et al. 2019

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Summary With advancement in technology—nanotechnology, various thermal energy storage (TES) materials have been invented and modified with promising thermal transport properties. Solid‐liquid phase change materials (PCMs) have been extensively used as TES materials for various energy applications due to their highly favourable thermal properties. The class of PCMs, organic phase change materials (OPCMs), has more potential and advantages over inorganic phase change materials (IPCMs), having high phase change enthalpy. However, OPCMs possess low thermal conductivity as well as density and suffer leakage during the melting phase. The encapsulation technologies (ie, micro and nano) of PCMs, with organic and inorganic materials, have a tendency to enhance the thermal conductivity, effective heat transfer, and leakage issues as TES materials. The encapsulation of PCMs involves several technologies to develop at both micro and nano levels, called micro‐encapsulated PCMs (micro‐PCM) and nano‐encapsulated PCMs (nano‐PCM), respectively. This study covers a wide range of preparation methods, thermal and morphological characteristics, stability, applications, and future perspective of micro‐/nano‐PCMs as TES materials. The potential applications, such as solar‐to‐thermal and electrical‐to‐thermal conversions, thermal management, building, textile, foam, medical industry of micro‐ and nano‐PCMs, are reviewed critically. Finally, this review paper highlights the emerging future research paths of micro‐/nano‐PCMs for thermal energy storage.

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“…Previous researches have been testied that the phase change temperatures of organic phase change materials decrease as the supporting spaces become narrower. 45,50,51 Thus, the SA molecules adsorbed in serial narrower pore exhibited different lower temperature of phase change just like SA/SG 1 and SA/SG 5 (Fig. 5a).…”

Section: -49mentioning

confidence: 99%

“…It resulted in the phase change temperatures further shied to lower temperature due to the rotation of the hydrocarbon chains require more low thermal energy in this condition. 50,51 Compared with the pore size distribution in incremental pore volume of the SG 1 and SG 5 (20-60 nm and 40 nm), the SG 10 had a smaller and concentrated size range (5-30 nm and 25 nm), generating a dened phase change peaks occurring 10 C lower. Also, the interaction (including surface tension forces and capillary forces) occurred between the SA and the SG matrix would be strong enough to disturb its phase change process when the pore can conne the crystallization of the PCM.…”

Section: -49mentioning

confidence: 99%

Graphene-decorated silica stabilized stearic acid as a thermal energy storage material

Xie

Chen

2017

RSC Adv.

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Novel thermal energy storage materials were synthesized from graphene-decorated silica (SG) and stearic acid (SA) by vacuum impregnation method. Three kinds of SG (SG 1 , SG 5 , and SG 10 ) were prepared by decorating silica with different contents of graphene and were then used to stabilize SA to prepare SA/ SG 1 , SA/SG 5 , and SA/SG 10 composites. The structures and thermal energy storage performances of the SA/SG composites were investigated. It is of interest that the thermal energy storage behaviors of the SA/ SG composites were dramatically changed with different contents of graphene, presenting more than one endothermal or exothermal peak in the differential scanning calorimetry (DSC) curves while pure SA had only one. The SA in SA/SG 1 and SA/SG 5 showed higher crystallinity (F c , 84.44% and 84.39%) and greater effective energy storage per unit mass (E ef , $150 J g À1 ) than that of SA in SA/SG 10 . These thermal energy storage behaviors and properties were revealed to be related to the pore structures of the SG.The thermal stability of the SA/SG composites was analyzed by a thermogravimetric analyzer (TGA), and the SA/SG composites have good thermal stability. Addition of graphene was beneficial to the enhancement in thermal conductivity of the SA/SG composite, which could reach 0.90 W m, and 1.12 W m À1 K À1 for SA/SG 1 , SA/SG 5 , and SA/SG 10 , respectively; and were 246%, 304%, and 331% higher than pure SA, respectively. SA/SG 5 has potential for application in thermal energy storage, especially in thermal gradients due to it having both high E ef and thermal conductivity.

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Nanoconfinement of phase change materials within carbon aerogels: phase transition behaviours and photo-to-thermal energy storage

Cited by 136 publications

References 63 publications

Engineering the Thermal Conductivity of Functional Phase‐Change Materials for Heat Energy Conversion, Storage, and Utilization

Engineering the Thermal Conductivity of Functional Phase‐Change Materials for Heat Energy Conversion, Storage, and Utilization

The micro‐/nano‐PCMs for thermal energy storage systems: A state of art review

Graphene-decorated silica stabilized stearic acid as a thermal energy storage material

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