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本文将氧化石墨烯(GO)、羧基化多壁碳纳米管(c-MWCNTs)等纳米碳材料通过水热的方法与氢氧化锂进行反应,得到碳基氢氧化锂化学蓄热复合材料。采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射分析仪(XRD)以及热重/同步差热分析仪(TGA-DSC)等表征手段获取了复合材料的表观形貌、负载组分、蓄热密度等关键热物性参数。研究表明纳米碳材料的复合使LiOH的单体水合速率大幅度提升,与此同时蓄热密度有着不同程度地增大,其中以GO/LiOH复合材料的化学蓄放热性能最为突出。除此之外,材料整体的导热系数也由于GO的复合有着显著的提高。本研究拓展了碳材料在储能领域的应用范围,针对纳米碳化学蓄热复合材料提供了理性的设计方法。
In this paper, GO, carboxylated MWCNTs and other carbon nanomaterials were reacted with lithium hydroxide by hydrothermal method to obtain carbon-based lithium hydroxide chemical heat storage composite material. The morphologies of the composites were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and thermogravimetric / synchronous differential thermal analysis (TGA- Load components, heat storage density and other key thermophysical parameters. The results show that the recombination of nano-carbon materials can greatly improve the monomer hydration rate of LiOH, while the heat storage density increases to some extent. Among them, GO / LiOH composites have the most prominent chemical heat storage and thermal performance. In addition, the overall thermal conductivity of the material is also significantly improved due to the GO composite. This research expands the application range of carbon materials in the field of energy storage, and provides a rational design method for carbon nanocomposite materials.