Stabilized multifunctional phase change materials based on carbonized Cu‐coated melamine foam/reduced graphene oxide framework for multiple energy conversion and storage

Abstract

The leakage of organic phase change materials (OPCMs) at temperatures above their melting point severely limits their large-scale application. The introduction of porous supports has been identified as an efficient leakageproofing method. In this study, a novel carbonized Cu-coated melamine foam (MF)/reduced graphene oxide (rGO) framework (MF/rGO/Cu-C) is constructed as a support for fabricating stabilized multifunctional OPCMs. MF serves as the supporting material, while rGO and Cu act as functional reinforcements. As a thermal energy storage material, polyethylene glycol (PEG) is encapsulated into MF/rGO/Cu-C through a vacuum-assisted impregnation method to obtain PEG@MF/rGO/Cu-C composite with excellent comprehensive performance. PEG@MF/rGO/Cu-C exhibits high phase change enthalpies of 148.3 J g −1 (melting) and 143.9 J g −1 (crystallization), corresponding to a high energy storage capability of 92.7%. Simultaneously, MF/rGO/Cu-C endues the composite with an enhanced thermal conductivity of 0.4621 W m −1 K −1 , which increases by 463% compared to that of PEG@MF. Furthermore, PEG@MF/rGO/Cu-C displays great light-to-thermal and electric-to-thermal conversion capabilities, thermal cycle stability, light-tothermal cycle stability, and shape stability, showing promising application prospects in different aspects.

A robust solvothermal-driven solid-to-solid transition route from micron SnC2O4 to tartaric acid-capped nano-SnO2 anchored on graphene for superior lithium and sodium storage

“…3f), suggesting that the capping of TA molecules improves the electronegativity of SnO 2 -TA NPs. 58,59 The TEM images of SnO 2 NPs-TA (Fig. 3g and h) exhibit a slightly better dispersion than the SnO 2 NPs (Fig.…”

Tightened 1D/3D carbon heterostructure infiltrating phase change materials for solar–thermoelectric energy harvesting: Faster and better

“…[37][38][39] PCMs can effectively harvest thermal energy by a solid-liquid transition, which have been intensively explored for advanced utilization in solar-thermal conversion, electric-thermal conversion, magnetic-thermal conversion, and thermal management of electronics. [40][41][42][43] Numerous studies have focused on achieving improvements in TE conversion performance and thermal energy conversion efficiency of PCMs. [44][45][46][47] Notably, the integration of multiple thermal energy sources freely existing in the environment for multiple purposes is another approach to achieve carbon neutrality.…”

Improved Anisotropic Thermal Transfer Property of Form-Stable Phase Change Material Supported by 3D Bionic Porous Copper

“…23 Hu et al constructed a novel Cu-coated carbonized melamine foam/reduced graphene oxide, which was used as the supporting framework for preparing PCC and exhibited good photothermal and electrothermal conversion capabilities, thermal cycling stability, and shape stability. 24 Wang et al investigated the embedding of PW into the Cu foam to form a PCC, and the results showed that the Cu foam can effectively improve the heat transfer uniformity inside PW and reduce the heat storage time by 40%. 25 Among those supporting additives, porous Cu is commonly used as a conductively supporting framework for accommodating PCMs due to its high thermal conductivity and good mechanical properties.…”

“…Buonomo et al used a numerical study method to investigate the effect of Al foam and ceramic nanoparticles together on enhancing the heat transfer properties of the system, and the results indicated that the metal foam significantly improved the heat transfer between the PCM and the heat transfer fluid related to the addition of nanoparticles . Hu et al constructed a novel Cu-coated carbonized melamine foam/reduced graphene oxide, which was used as the supporting framework for preparing PCC and exhibited good photothermal and electrothermal conversion capabilities, thermal cycling stability, and shape stability . Wang et al investigated the embedding of PW into the Cu foam to form a PCC, and the results showed that the Cu foam can effectively improve the heat transfer uniformity inside PW and reduce the heat storage time by 40% …”