一种低热阻和定向装配策略,使超高热导率相变复合材料能够实现高效的热管理
Si Wu1, Xiao Zhang1, Haoyuan Sang1
1Research Center of Solar Power & Refrigeration, Shanghai Jiao Tong University, Shanghai, 200240, China.
Small (Weinheim an der Bergstrasse, Germany)
|September 18, 2025
概括
研究人员开发了具有超高热导率的高性价比的基于石墨的相变复合材料 (PCC). 这项创新通过对准石墨颗粒来提高热管理和能量储存,从而实现更好的传热.
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:
- 变相材料 (PCM) 对于热管理和储能至关重要.
- 在PCM中,高热导率对于快速响应和高功率密度至关重要.
- 现有的石墨/PCM复合材料在实现高性能和低成本方面面临着挑战.
研究的目的:
- 开发一种新的策略,用于合成基于石墨的超高导热性相变复合材料 (PCC).
- 为先进的热管理和存储应用创建低成本,高性能PCC.
主要方法:
- 使用了一种新的策略,涉及PCM填充扩展石墨颗粒的低热阻和定向组装.
- 采用压缩诱导组装和局部加热处理来调整石墨板并降低界面热阻.
- 制造的PCC块含有受控制的石墨含量 (5-17体积%).
主要成果:
- 在PCC中实现了超高的导热率,范围为8.7-44.7 W m-1 K-1,比纯PCM高两倍.
- 证明了PCC块的优越的整体热效应性和出色的机械稳定性.
- 设计了一个优化的PCC设备,通过峰值负载转移将峰值冷却功率降低约35%.
结论:
- 开发的方法为制备高性能,具有成本效益的热储材料提供了一个有前途的途径.
- 定向组装策略显著提高了PCC的导热率和机械性能.
- 这些先进的PCC适用于各种与热相关的应用,需要高效的热管理和储存.
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