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基于碳化聚合物/凯弗拉纳米纤维复合气凝的单向结构磁性相变复合材料,用于促进太阳能-热电能转换

Tao Shi¹, Huan Liu¹, Xiaodong Wang¹

¹State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.

ACS applied materials & interfaces

|February 16, 2024

概括

这项研究引入了一种新的磁性相变复合材料,用于高效的太阳能热电能能量转换. 该材料展示了高光热转换和持续发电,为清洁能源解决方案铺平了道路.

科学领域:

材料科学材料科学材料科学
能源转换能源转换
纳米技术纳米技术

背景情况:

开发高效的太阳能电力转换方法对于可持续能源至关重要.
现有的太阳能热电系统在储能和转换效率方面面临着挑战.

研究的目的:

开发一种新的单向结构的磁性相变复合材料,用于高效的太阳能热电能转换.
研究使用这种复合材料的太阳能热电发电系统 (STEGS) 的性能.

主要方法:

使用碳化聚胺/Kevlar纳米纤维气凝,CoFe2O4纳米颗粒,聚乙烯甘醇 (PEG) 和聚烯醇制造复合材料.
复合材料的结构,热性能和光热转换效率的表征.
在不同的太阳辐射和环境条件下,与复合材料相结合的STEGS的建造和测试.

主要成果:

复合材料具有很高的潜热容量 (150 J g-1),优异的形状稳定性和84.8%的光热转换效率.
与空气相比,STEGS在冰水中实现了显著更高的输出电压和电流.
由于PEG的潜在热释放,观察到持续发电810秒.
一个交替的磁场提高了输出电压和电流,分别高达13.7%和11.5%.

结论:

开发的磁性相变复合材料为高效的太阳能热电能转换和储存提供了一个有前途的平台.
独特的结构和磁性特性有助于提高太阳能利用率.
这项工作提出了一种创新的方法,用于使用先进的功能性材料来生产清洁的电力.

关键词:

碳化聚合物/Kevlar纳米纤维复杂气凝磁性相变复合材料的复合材料光热能储能系统是光热能储能系统,用于储能.太阳能 - 热能 - 电能转换热电发电是一个热电发电的过程.

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