Nanosilver modified navel orange peel foam/polyethylene glycol composite phase change materials with improved thermal conductivity and photo-thermal conversion efficiency. (1st December 2022)

• Record Type: Journal Article
• Authors: Xiao, Shikun; Zou, Minming; Xie, Yuqiong; Chen, Wenjing; Hu, Xiaowu; Ma, Yan; Zu, Shuai; Che, Yinhui; Jiang, Xiongxin
• Is Part Of: Journal of energy storage. Volume 56:Part A(2022)
• Publication Date: 2022-12-01
• Subjects: CPCMs composite phase change materials -- BPC peel-based porous carbon -- PEG polyethylene glycol -- PCM phase change material; Navel orange peel-based porous carbon -- Nano-Ag -- Thermal conductivity -- Photo-thermal conversion; Energy storage -- Periodicals; Energy storage -- Research -- Periodicals; 621.3126
• DOI: 10.1016/j.est.2022.105976
• Languages: English
• ISSNs: 2352-152X

Abstract

Abstract: Porous carbon-based composite phase change materials (CPCMs) have received widespread attention from researchers for their stable shape and considerable latent heat storage capacity. Here, using navel orange peel-based porous carbon (BPC) as the support carrier, nano-Ag as the surface modification material and polyethylene glycol (PEG) for the phase change medium, a novel PEG/BPC-Ag (Ag@CPCM) was fabricated by vacuum impregnation. Surprisingly, the experimental results indicated that nano-Ag modified the BPC could make the Ag@CPCM have stronger photo-thermal conversion ability, higher thermal conductivity and better thermal reliability. Significantly, the addition of nano-Ag increased the thermal conductivity of navel orange peel-based CPCMs to 0.639 W/m K (Ag@CPCM) from 0.313 W/m K (PEG/BPC), and its relative enthalpy efficiency η raised to 107.2 % from 104.8 %, and its photo-thermal conversion efficiency θ increased to 94.7 % from 77.2 %. Furthermore, the prepared novel CPCMs maintained its original phase change properties after 100 thermal cycles of testing, which demonstrated that the prepared CPCMs possessed favorable thermal stability and reusability. Overall, the Ag@CPCM materials have great potential for applications such as thermal management and solar energy storage. Highlights: This work provides the first example of nano-Ag modified navel orange peel foam. The PEG/BPC-Ag exhibits a high thermal conductivity (0.639 W/mK). The photo-thermal conversion efficiency of the Ag@CPCM can reach 94.7 %. The relative enthalpy efficiency of the Ag@CPCM can be up to 107.2 %. The Ag@CPCM has excellent thermal stability and reusability.