Scholarlink

<p>As a sustainable energy source, solar power has emerged as a key focus in renewable energy research. Nevertheless, its practical implementation faces substantial challenges due to inherent spatiotemporal intermittency. This investigation presents an innovative approach to overcome these limitations through advanced phase change material (PCM) engineering. This work developed hierarchically structured composite PCMs via scalable injection molding technology, integrating high-density polyethylene (HDPE), polyketone (PK), and functional graphite additives. The engineered materials demonstrate an elevated phase transition temperature (Tm = 129.1&#xa0;°C, ΔH = 101.2&#xa0;J g⁻¹), making them particularly suitable for mid-temperature solar energy conversion. A breakthrough alternating layered encapsulation architecture enables scalable manufacturing while preventing leakage; 95% dimensional retention is achieved after 100 melt–freeze cycles with &lt; 5.1% latent-heat loss. The synergistic incorporation of 4.5 wt % graphite nanofillers enhances thermal conductivity by 36% (from 0.50 to 0.68&#xa0;W m⁻¹ K⁻¹), enabling a photothermal conversion efficiency of 23.4% under 250 mW cm⁻² (AM 1.5). These multifunctional composites demonstrate significant potential for next-generation thermal energy management systems, particularly in addressing critical energy storage challenges in solar applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

High density polyethylene-based composite phase change materials with enhanced comprehensive performance for efficient photothermal energy conversion

  • 期刊论文

  • 发表日期：

    2026年2月2日

查看全文
  • Pengcheng Qiao,
  • Junyao Dai,
  • Zhipeng Niu,
  • Yujun Li,
  • Di Lan,
  • Yuanxue Yi,
  • Yu Cao,
  • Yue Wang,
  • Libo Chen

摘要

As a sustainable energy source, solar power has emerged as a key focus in renewable energy research. Nevertheless, its practical implementation faces substantial challenges due to inherent spatiotemporal intermittency. This investigation presents an innovative approach to overcome these limitations through advanced phase change material (PCM) engineering. This work developed hierarchically structured composite PCMs via scalable injection molding technology, integrating high-density polyethylene (HDPE), polyketone (PK), and functional graphite additives. The engineered materials demonstrate an elevated phase transition temperature (Tm = 129.1 °C, ΔH = 101.2 J g⁻¹), making them particularly suitable for mid-temperature solar energy conversion. A breakthrough alternating layered encapsulation architecture enables scalable manufacturing while preventing leakage; 95% dimensional retention is achieved after 100 melt–freeze cycles with < 5.1% latent-heat loss. The synergistic incorporation of 4.5 wt % graphite nanofillers enhances thermal conductivity by 36% (from 0.50 to 0.68 W m⁻¹ K⁻¹), enabling a photothermal conversion efficiency of 23.4% under 250 mW cm⁻² (AM 1.5). These multifunctional composites demonstrate significant potential for next-generation thermal energy management systems, particularly in addressing critical energy storage challenges in solar applications.