基于混合石墨烯气凝胶的复合相变材料用于热能存储的增强热性能

Enhanced Thermal Performance of Composite Phase Change Materials Based on Hybrid Graphene Aerogels for Thermal Energy Storage.

作者信息

Shang Yu, Zhang Dong, An Minrong, Li Zhao

机构信息

School of Materials Science and Engineering, Xi'an Shiyou University, Xi'an 710065, China.

Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China.

出版信息

Materials (Basel). 2022 Aug 4;15(15):5380. doi: 10.3390/ma15155380.

DOI:10.3390/ma15155380

PMID:35955314

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9369899/

Abstract

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 (GO) acting as a dispersing agent, well-defined hybrid graphene aerogels (HGAs) with a three-dimensional (3D) porous structure were successfully synthesized by hydrothermal reaction of GO and graphene nanoplatelets (GNPs). GNPs, dispersing uniformly along the interconnecting graphene network, acted as thermal conductive fillers and supporting materials. Palmitic acid (PA) was impregnated into the HGA by vacuum forces. It was found that the thermal conductivity of the PA/HGA was enhanced without compromising heat storage capacity. Compared with PA, the PA/HGA with 4.2 wt% GNPs exhibited enhanced thermal conductivity of 2.1 W/mK and high latent heat of 206.2 J/g simultaneously. The PA/HGA with good thermal performance has potential applications in thermal energy storage.

摘要

热导率和潜热是相变材料（PCM）在热能存储中的关键性能参数。为了提高PCM的热性能，在氧化石墨烯（GO）作为分散剂的帮助下，通过GO与石墨烯纳米片（GNP）的水热反应成功合成了具有三维（3D）多孔结构的明确的混合石墨烯气凝胶（HGA）。GNP沿着互连的石墨烯网络均匀分散，充当热传导填料和支撑材料。通过真空力将棕榈酸（PA）浸渍到HGA中。结果发现，PA/HGA的热导率提高了，而蓄热能力没有受到影响。与PA相比，含有4.2 wt% GNP的PA/HGA同时表现出增强的热导率2.1 W/mK和206.2 J/g的高潜热。具有良好热性能的PA/HGA在热能存储方面具有潜在应用。