Thermophysical Investigation of Multiform NiO Nanowalls@carbon Foam/1-Octadecanol Composite Phase Change Materials for Thermal Management

• Published in: Molecules (Basel, Switzerland) Vol. 29; no. 18; p. 4453
• Main Authors: Wang, Xiuli, Wang, Qingmeng, Cheng, Xiaomin, Xiong, Wen, Chen, Xiaolan, Cheng, Qianju
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 19.09.2024; MDPI
• Subjects: Adsorption; Carbon; carbon foam; Composite materials; Electric properties; Energy storage; Force and energy; Heat conductivity; Investigations; Metal oxides; multiform NiO; Nanoparticles; PCMs; Pore size; Spectrum analysis; thermal management; Thermal properties; China; multiform NiO; PCMs; carbon foam; thermal management
• DOI: 10.3390/molecules29184453
• ISSN: 1420-3049

Multiform NiO nanowalls with a high specific surface area were constructed in situ on carbon foam (CF) to construct NiO@CF/OD composite phase change materials (CPCMs). The synthesis mechanism, microstructures, thermal management capability, and photothermal conversion of NiO@CF/OD CPCMs were systematically studied. Additionally, the collaborative enhancement effects of CF and multiform NiO nanowalls on the thermal properties of OD PCMs were also investigated. NiO@CF not only maintains the porous 3D network structure of CF, but also effectively prevents the aggregation of NiO nanosheets. The chemical structures of NiO@CF/OD CPCMs were analyzed using XRD and FTIR spectroscopy. When combined with CF and NiO nanosheets, OD has high compatibility with NiO@CF. The thermal conductivity of NiO@CF/OD-L CPCMs was 1.12 W/m·K, which is 366.7% higher than that of OD. The improvement in thermal conductivity of CPCMs was theoretically analyzed according to the Debye model. NiO@CF/OD-L CPCMs have a photothermal conversion efficiency up to 77.6%. This article provided a theoretical basis for the optimal design and performance prediction of thermal storage materials and systems.