扩展石墨/水泥复合材料用于大规模的能源采集:结构控制和热电性能
Peng Wang1, Jian Wei1, Lihang Sheng1
1College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
Langmuir : the ACS journal of surfaces and colloids
|July 16, 2025
概括
这项研究使用多尺寸扩展石墨 (EG) 和特定的水泥矿物质来增强水泥复合材料的热电性能. 这一创新提升了建筑结构的能源采集潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 收集能源 收集能源
- 热电材料 热电材料
背景情况:
- 建筑结构从长时间暴露在阳光下积累了大量的低级热能.
- 有扩张石墨 (EG) 的水泥基复合材料为热收获提供热电潜力.
- 关于EG粒子大小和水泥矿物质组成对热电特性的影响尚不清楚.
研究的目的:
- 研究多颗粒大小扩展石墨 (EG) 对EG/水泥基复合材料的热电特性的影响.
- 探索C2S和C4A3S̅水泥矿物质对热电性能的影响.
- 优化基于EG/水泥的复合材料,以实现高效的大规模热收集和能源供应.
主要方法:
- 用不同颗粒大小的酸蚀刻EG制备EG/水泥基复合材料.
- 加入高纯度的C2S和C4A3S̅水泥块单矿物质.
- 热电性质的表征,包括电导率和Seebeck系数.
主要成果:
- 多颗粒大小EG的协同效应显著改善了EG导电网络的连接性.
- 在EG/水泥基复合材料中,C2S和C4A3S̅的组合提高了载体的移动性.
- 达到峰值的热电特性:电导率7.43 S/cm,Seebeck系数-65.69 μV/K,功率因子3.23 μW m−2 K−2.
结论:
- 多颗粒大小的EG和协同的水泥矿物成分是提高热电性能的关键.
- 与含有单个矿物质的复合材料相比,EG/C2S-C4A3S̅复合材料显示出显著改善的功率因子.
- 这项研究突出了开发高效热电材料的有希望的途径,用于建筑集成的能源采集.
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