Phase change material filled hybrid 2D / 3D graphene structure with ultra-high thermal effusivity for effective thermal management. (May 2021)

• Record Type: Journal Article
• Authors: Liang, Gengyuan; Zhang, Jianwei; An, Shaohang; Tang, Jun; Ju, Su; Bai, Shuxin; Jiang, Dazhi
• Is Part Of: Carbon. Volume 176(2021)
• Page Start: 11
• Page End: 20
• Publication Date: 2021-05
• Subjects: Graphene -- Nanocomposite -- Thermal management -- Interface; Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2020.12.046
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Graphene-based energy storage and renewable material has increasingly attracted research interest, due to its high thermal conductivity and light weight. Researchers fill phase change material (PCM) into three-dimensional graphene foam, to obtain a composite with high energy storage capability and moderate thermal conductivity. However, heat transfer mode of this kind of composite is single and cannot maximize the advantages of graphene. Herein, a stearic acid filled graphene-foam composite (GFSAC) connected with graphene paper (GP) through gravity-assisted wetting attaching process is demonstrated. The GP/GFSAC/GP composite possesses a high thermal conductivity of 1.72 Wm −1 K −1 (with 0.53 wt % graphene loading), and an excellent effective thermal effusivity of 18.45 Jcm −3/2 m −1/2 s −1/2 K −1/2 . The GP/GFSAC/GP composite is shown to be an ideal material for thermal energy storage and renewable. Additionally, the low thermal resistance connection is achieved between 3D GFSAC and 2D GP, which plays a key role in the improvement of the composite's thermal effusivity. Compared to other samples, the maximum temperature of the GP/GFSAC/GP composite is significantly lower and its temperature uniformity is much better, under the same heating condition. More importantly, after stop heating, the GP/GFSAC/GP composite shows the best temperature maintenance capacity. Graphical abstract: Image 1