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<p>With issues such as the modern fossil energy crisis and energy shortage, phase change energy storage plays an important role in the conversion of renewable energy sources such as solar energy. However, its application in thermal energy storage has been limited by problems such as easy leakage, low thermal conductivity, and low energy conversion efficiency. In this work, carbon-based carriers were obtained by acid–base activation pretreatment and hybrid ball-milling post-treatment with nanocellulose. Composite phase change materials (CPCMs) with high thermal conductivity, stable morphology, and good energy storage properties were prepared by loading paraffin wax (PW). Scanning electron microscopy and Fourier transform infrared spectroscopy showed that PW was encapsulated in the supporting skeleton. BET nitrogen adsorption–desorption demonstrated that the carbon material produced by activation pyrolysis had rich pore size structures. X-ray diffractometer, laser Raman spectrometer, and visible/near-infrared spectroscopy indicated that the carbon-based carrier had good crystallinity, highly graphitized, and good light absorption properties in the full band. Differential scanning calorimetry measured the latent heat of CPCMs reached around 100&#xa0;J/g, which maintained cycle stability after 50 heating/cooling cycles. With a photothermal conversion efficiency of 85.71%, this biomass-based CPCM has promising applications in solar thermal storage applications and contributes to the sustainable utilization of biomass waste.</p>

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Acid–Alkali Activation and Synergistic Ball-Milling Co-processing of Palm Silk for Photothermal Conversion

  • 期刊论文

  • 发表日期：

    2025年7月25日

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  • Yingao Jiao,
  • Bangyi Wu,
  • Guanzhi Wang,
  • Cheng Pan,
  • Xiaofei Li,
  • Guozhi Fan,
  • Yifei Long,
  • Qunpeng Cheng,
  • Haitao Yang

摘要

With issues such as the modern fossil energy crisis and energy shortage, phase change energy storage plays an important role in the conversion of renewable energy sources such as solar energy. However, its application in thermal energy storage has been limited by problems such as easy leakage, low thermal conductivity, and low energy conversion efficiency. In this work, carbon-based carriers were obtained by acid–base activation pretreatment and hybrid ball-milling post-treatment with nanocellulose. Composite phase change materials (CPCMs) with high thermal conductivity, stable morphology, and good energy storage properties were prepared by loading paraffin wax (PW). Scanning electron microscopy and Fourier transform infrared spectroscopy showed that PW was encapsulated in the supporting skeleton. BET nitrogen adsorption–desorption demonstrated that the carbon material produced by activation pyrolysis had rich pore size structures. X-ray diffractometer, laser Raman spectrometer, and visible/near-infrared spectroscopy indicated that the carbon-based carrier had good crystallinity, highly graphitized, and good light absorption properties in the full band. Differential scanning calorimetry measured the latent heat of CPCMs reached around 100 J/g, which maintained cycle stability after 50 heating/cooling cycles. With a photothermal conversion efficiency of 85.71%, this biomass-based CPCM has promising applications in solar thermal storage applications and contributes to the sustainable utilization of biomass waste.