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Facile preparation of flexible eicosane/SWCNTs phase change films via colloid aggregation for thermal energy storage

Author

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  • Chen, Renjie
  • Huang, Xinyu
  • Deng, Weibin
  • Zheng, Ruizhi
  • Aftab, Waseem
  • Shi, Jinmin
  • Xie, Delong
  • Zou, Ruqiang
  • Mei, Yi

Abstract

Carbon nanotubes (CNTs) based phase change composites have been widely reported to be used in areas related to energy conversion and storage. However, these bulk-like materials are not convenient for the further applications. Herein, we introduce the preparation of electrically conductive CNT/polymer films into the fabrication of conductive PCM films. The stable single wall carbon nanotube (SWCNT) dispersion was prepared by ultrasonic treatment with the help of surfactant. The SWCNT hydrogel was prepared by the addition of CaCl2 (aq.) via colloid aggregation (diffusion-limited cluster aggregation). Eicosane was infiltrated into the SWCNT skeleton by diffusion after solvent replacement, and the flexible phase change film (PCMF) was easily obtained by volatilization synchronously. According to the SEM images, eicosane was encapsulated in the SWCNT scaffolding. And PCMF exhibited a promising conductivity, flexibility, thermal stability and reversibility during the heat storage and release processes. For example, when the SWCNT ratio was 27.1%, the latent heat and conductivity were 204.8 J/g and 620.3 S/m, respectively. The results of 200 repeated melting and freezing cycles revealed that the sample have stable latent heat performance. The eicosane/SWCNT films could store thermal energy at modulated input voltage, which could be applied by conventional batteries. And the highest energy storage efficiency of samples was up to 91.3%. These flexible electro-driven films have wide prospect in smart electronic device, small scale heater, infrared stealth, wearable devices, etc.

Suggested Citation

  • Chen, Renjie & Huang, Xinyu & Deng, Weibin & Zheng, Ruizhi & Aftab, Waseem & Shi, Jinmin & Xie, Delong & Zou, Ruqiang & Mei, Yi, 2020. "Facile preparation of flexible eicosane/SWCNTs phase change films via colloid aggregation for thermal energy storage," Applied Energy, Elsevier, vol. 260(C).
  • Handle: RePEc:eee:appene:v:260:y:2020:i:c:s0306261919320070
    DOI: 10.1016/j.apenergy.2019.114320
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    2. Yang, Yang & Yuan, Wei & Zhang, Xiaoqing & Ke, Yuzhi & Qiu, Zhiqiang & Luo, Jian & Tang, Yong & Wang, Chun & Yuan, Yuhang & Huang, Yao, 2020. "A review on structuralized current collectors for high-performance lithium-ion battery anodes," Applied Energy, Elsevier, vol. 276(C).

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