Novel properties of stearic acid / MXene - Graphene oxide shape - Stabilized phase change material: Ascended phase transition temperature and hierarchical transition

doi:10.1016/j.solmat.2022.111948

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	Novel properties of stearic acid / MXene - Graphene oxide shape - Stabilized phase change material: Ascended phase transition temperature and hierarchical transition
	Yang, Bochao; Zhang, Ting; Wang, Jianjun; Lv, Jie; Zheng, Yi; Zhang, Yu; Wang, Yi
刊名	Solar Energy Materials and Solar Cells
	2022-10-15
卷号	247
关键词	Activation energy Graphene Heat storage Hybrid materials Latent heat Nanosheets Stearic acid Storage (materials) Van der Waals forces Ascended phase change temperature Confinement effects Graphene oxides Hierarchical transition Latent heat storage Phase change temperature Phase transition temperatures Photothermal conversion Property Shape stabilized phase change material
ISSN号	0927-0248
DOI	10.1016/j.solmat.2022.111948
英文摘要	To develop novel materials with active photothermal conversion and latent heat storage properties, the shape-stabilized phase change material was fabricated via self-assembly method employing stearic acid (SA) as heat storage medium, graphene oxide and MXene as hybrid matrix (GM) and photothermal conversion agent. The morphology, structure, properties and phase transition behavior were investigated by various techniques. The results shown that SA/GM has sandwich-like structure and SA is confined between matrix nanosheets in multiple crystallographic forms. Due to the superposition of host-guest interaction and intrinsic van der Waals force between nanosheets, the primary melting temperature of SA/GM climbs 27.7 °C approximately than that of SA, as well as the total latent heat decreases by 28.55%–30.85% compared with theoretical values. The confinement effect increases the crystallization activation energy of confined SA, and leads to the formation of non-phase transition layer, transitional confinement layer and proximate bulk layer. However, the above observations are applicable to fatty acids/GM, only the suppressed latent heat occurs in all GM-matrix composites. In addition, the SA/GM7 has excellent photothermal conversion efficiency, as high as 93.34%, and gradient latent heat storage capacity, 45.96 J g−1 at 74.43 °C and 91.19 J g−1 at 92.37 °C. © 2022 Elsevier B.V.
WOS研究方向	Energy & Fuels ; Materials Science ; Physics
语种	英语
出版者	Elsevier B.V.
WOS记录号	WOS:000849800000003
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/159716]
专题	石油化工学院
作者单位	College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Yang, Bochao,Zhang, Ting,Wang, Jianjun,et al. Novel properties of stearic acid / MXene - Graphene oxide shape - Stabilized phase change material: Ascended phase transition temperature and hierarchical transition[J]. Solar Energy Materials and Solar Cells,2022,247.
APA	Yang, Bochao.,Zhang, Ting.,Wang, Jianjun.,Lv, Jie.,Zheng, Yi.,...&Wang, Yi.(2022).Novel properties of stearic acid / MXene - Graphene oxide shape - Stabilized phase change material: Ascended phase transition temperature and hierarchical transition.Solar Energy Materials and Solar Cells,247.
MLA	Yang, Bochao,et al."Novel properties of stearic acid / MXene - Graphene oxide shape - Stabilized phase change material: Ascended phase transition temperature and hierarchical transition".Solar Energy Materials and Solar Cells 247(2022).