自组装的化纳米板基气凝作为高效的热能储存相变材料的支持框架
Lanshu Xu1, Yujie Ding1, Laishun Wang2
1Zhuhai Fudan Innovation Institution Zhuhai 518057 China.
RSC advances
|November 29, 2023
概括
化纳米片和减少的氧化石墨烯形成了用于相变材料 (PCM) 的新型气凝. 这些复合PCM提供了增强的导热性和形状稳定性,用于高效的能量储存和热管理.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 储能 储能 储能 储能 储能 储能
背景情况:
- 换相材料 (PCM) 对于热能储存和管理至关重要.
- 传统PCM的局限性包括低导热性和不良形状稳定性.
- 增强的热性能和结构完整性对于先进的PCM应用至关重要.
研究的目的:
- 开发一种新的复合相变材料,其热导率,形状稳定性和潜热保持性得到改善.
- 使用化纳米片 (BNNSs) 和减少的氧化石墨烯 (rGO) 来创建一个坚固的气凝支结构.
- 在BNNS/rGO气凝中封装聚乙烯甘醇 (PEG),以增强热能存储.
主要方法:
- 使用热水和冷干燥工艺合成BNNS/rGO气凝.
- 化纳米板 (BNNSs) 与减少氧化石墨烯 (rGO) 纳米板进行了交叉链接.
- 聚乙烯甘醇 (PEG) 被封装在多孔气凝框架内,以创建复合PCM.
主要成果:
- 复合PCM,称为BG气凝,表现出高热导率高达1.12W m-1 K-1.
- 观察到出色的形状稳定性,材料在90°C下保持其形状10分钟.
- 实现了187.2 J g-1的高潜热,保留了97.3%的纯PEG潜热.
结论:
- 开发的BNNS/rGO基于气凝的复合PCM显示出优越的热性能和结构完整性.
- 这些材料显示出在先进的储能系统中应用的巨大潜力.
- 这些发现表明,克服目前用于热管理的相变材料技术局限性的有希望的途径.
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