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The utilization of graphene aerogel encapsulated phase change materials (PCMs) presents a promising strategy to achieve solar-thermal energy conversion and storage. However, the self-stacking effect and inherent lattice defects in graphene aerogel significantly restrict its overall performance in the encapsulation of PCMs.
Graphene-based nanostructures, as either graphene nanosheets or graphene-based porous nanostructures, can improve the thermal conductivity of phase change materials and shape stability of these energy storage systems significantly.
Moreover, recent studies presented here suggest that graphene-based phase change composites can be considered as promising energy harvesting systems for solar-to-thermal and solar-to-electrical energy conversion and storage applications. 1. Introduction
The phase change system can be stable for more than 100 thermal cycles [ 87 ]. Functionalized graphene can also be used as the Pickering stabilizer to encapsulate stearic acid through the Pickering emulsion to fabricate high-performance core-shell PCCs with high thermal conductivities and energy storage characteristics [ 86 ].
However, low thermal conductivity and shape-instability through the phase transition process are two main drawbacks of phase change materials towards industrialization. In this review paper, recent progresses in employing graphene-based nanostructures as a versatile solution for the aforementioned shortcomings are presented in detail.
Increased thermal conductivity of eicosane-based composite phase change materials in the presence of graphene nanoplatelets M. Amin, N. Putra, E.A. Kosasih, E. Prawiro, R.A. Luanto, T.M.I. Mahlia Thermal properties of beeswax/graphene phase change material as energy storage for building applications
Thermal conductivity and latent heat are crucial performance parameters for phase change materials (PCMs) in thermal energy storage. To enhance the thermal performance of PCMs, with the help of graphene oxide …
The energy is stored by phase change materials during the phase transition process. The obtained hybrid nanocomposites exhibit excellent thermal stability with high melting–freezing enthalpy and excellent reversibility. Furthermore, …
To overcome fatal shortcomings of organic phase change materials (PCMs), such as leakage during work, low thermal conductivity and shortage of multiple driving ways, we propose a novel strategy to synthesize …
Phase changing materials (PCM) release or absorb heat in high quantity when there is a variation in phase. PCMs show good energy storage density, restricted operating temperatures and hence find application in various systems like heat pumps, solar power plants, electronic devices, thermal energy storage (TES) systems. Though it has extensive usage in such a diverse range …
Fabrication of shape-stable composite phase change materials based on lauric acid and graphene/graphene oxide complex aerogels for enhancement of thermal energy …
Energy is stored as sensible heat, latent heat, thermochemical heat or a combination of them. A latent heat storage system by phase change materials (PCMs) is much more advantageous than other methods because it has high energy density and can be performed at a constant temperature [1].PCMs are classified into different groups, including …
EG can adsorb liquid phase change materials (PCMs) mainly because of capillary action; however, EG is hydrophobic, which makes it less compatible with hydrated salts. Herein, hydrophilic EG (HEG) was prepared with Triton X-100 (TX-100) as surface modifier. The HEG–magnesium nitrate hexahydrate (HEG-MNH) composite as a PCM was investigated for ...
Graphene-based nanostructures, as either graphene nanosheets or graphene-based porous nanostructures, can improve the thermal conductivity of phase change materials and shape stability of these ...
With the increasing importance of electronic devices in modern industry, considerable efforts have been devoted to solving the problem that the electronic devices fail to work normally in a cold environment. Herein, we designed and fabricated a graphene wrapped wood-based phase change composite with electro-thermal conversion and energy storage …
A non-volatile silicon photonics switch based on phase-change materials actuated by graphene heaters shows a switching energy density that is within an order of magnitude of the fundamental ...
Phase change materials (PCMs) have attracted more and more attention in the field of latent heat storage. In order to solve the leakage behavior and improve heat transfer performance of polyethylene glycol (PEG), a method of self-assembled hybrid aerogel filled with carbon nanotubes (CNTs) combined with reduced graphene oxide (rGO) nanosheets is …
The expanded graphite/PCM phase change composite eliminates leakage and increases effective thermal conductivity while the graphene coating enables radiative cooling for PCM regeneration. The composite demonstrates excellent thermal performance in a real BTMS and shows a 26% decrease in temperature when compared to conventional BTMS materials.
Thermal energy storage (TES) systems using phase change materials (PCMs) are of increasing interest for more efficient energy utilization. Herein, sodium sulfate decahydrate (Na2SO4·10H2O; SSD)/nanofibrillated cellulose (NFC)/graphite PCM composites were prepared by a simple blending method. NFC and graphite were used to improve the performance of SSD …
The expanded graphite/PCM phase change composite eliminates leakage and increases effective thermal conductivity while the graphene coating enables radiative cooling …
Here we show anion intercalation in protonated graphite phase carbon nitride (GCN) that tunes the interlayer spacing and functions of GCN-based membranes for selective permeation in aqueous ...
Carbon nanotube graphene multilevel network based phase change fibers and their energy storage properties†. Xiaoyu Yang ab, Jingna Zhao * b, Tanqian Liao c, Wenya Li c, Yongyi Zhang b, Chengyong Xu a, Xiaohua Zhang * d and Qingwen Li b a School of Science, Nanchang Institute of Technology, Nanchang 330099, China b Key Laboratory of …
Phase change materials (PCMs) have attracted significant attention in thermal management due to their ability to store and release large amounts of heat during phase transitions. However, their widespread application is restricted by leakage issues. Encapsulating PCMs within polymeric microcapsules is a promising strategy to prevent leakage and increase …
Ag-graphene/PEG composite phase change materials for enhancing solar-thermal energy conversion and storage capacity
Such abilities, though rare, lead to a number of exciting phenomena, such as phase-change memory effects. In the case of trilayer graphene, there are two common stacking configurations (ABA and ...
The utilization of graphene aerogel encapsulated phase change materials (PCMs) presents a promising strategy to achieve solar-thermal energy conversion and storage. …
The low thermal conductivity and liquid-phase leakage of phase change materials seriously hinder their large-scale applications. Porous materials have been identified as an effective way to address the leakage and provide a thermally conductive network. Therefore, we designed an expanded graphite-based multifunctional composite phase change thermal …
3D porous graphene aerogel exhibits a high surface area which can hold plenty of pure phase change material (PCM) into the internal space. In order to maintain the flexibility of PCM without volume shrinkage under the external force, cross-linked graphene aerogel was prepared by the cysteamine vapor method. The cross-linked graphene aerogel had a high …
Graphene-Based Phase Change Composite Nano-Materials for Thermal Storage Applications Marina T selepi 1, Costas Prouskas 2, *, Dimitrios G. Papageorgiou 2, Isaac.
Paraffin with 5 °C phase change temperature (Pn5) was employed as the phase change material (PCM). It was integrated into graphite, expanded graphite, and two types of …
Graphene-based phase change composites hold significant potential for solar energy utilization, but their poor thermal conductivity hinders their practical applications. In this work, an air-dried graphene skeleton (AGS) with excellent thermal conductivity enhancement efficiency was constructed by the ice templating method and syneresis, and ...
This study examines the recent advancements in graphene-based phase change composites (PCCs), where graphene-based nanostructures such as graphene, graphene oxide …
Phase change materials (PCMs), which can store thermal energy as latent heat and release the heat at a constant phase change temperature, have been considered as smart materials for thermal storage and intelligent temperature-control [1, 2].Therefore, PCMs have attracted extensive attention for smart textiles since they can keep the body in a comfortable …
Graphene aerogel-supported phase change material (PCM) composites sustain the initial solid state without any leakage problem when they are melted. The high portion of pure PCM in the composite ...
The phase transition temperature of Sb 2 Se 3 is 473 K and the melting temperature of Sb 2 Se 3 is 893 K [33,34], where the upper temperature limit of the proposed device is 1100 K.
Incorporation of graphene to the hydrocarbon-based phase change material allows one to increase its thermal conductivity by more than two orders of magnitude while preserving its latent heat ...