Preparation of binary eutectic chloride/expanded graphite as high-temperature thermal energy storage materials
Preparation of binary eutectic chloride/expanded graphite as high-temperature thermal energy storage materials
复制标题
高温储热材料二元共晶氯化物/膨胀石墨的制备
DOI：
10.1016/j.solmat.2015.12.038
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发表时间：
2016
影响因子：
6.9
通讯作者：
Ding J
中科院分区：
文献类型：
--
作者：
Tian Heqing;Wang Weilong;Ding Jing;Huang Chenglong;Wei Xiaolan;Wang WL;Ding J
采用浸渍法制备了二元共晶氯化物（NaCl-CaCl 2）/膨胀石墨（EG）复合相变材料，并利用TEM、DSC和Hotdisk技术研究了EG添加剂对复合盐热性能的影响。结果表明，复合相变材料的比热容和相变潜热均随EG含量的增加而减小，相变温度变化不大，复合相变材料的导热系数随EG含量和密度的增加而线性增加。其中，EG含量为20wt%、密度为2g/cm ~ 3的复合相变材料的热导率为4.937W/（m·K），比二元共晶氯化物的热导率高701.1%。复合相变材料的升温速率和降温速率均高于二元共晶氯化物，且随着EG含量的增加，相变材料的熔化和凝固平台时间也有所缩短。
Binary eutectic chloride (NaCl–CaCl2)/expanded graphite (EG) composite phase change materials (PCMs), used as high-temperature thermal energy storage materials, were prepared by an impregnating method, and the effects of EG additives on thermal properties of compound salts were investigated by TEM, DSC and Hotdisk techniques. The results revealed that both the specific heat capacity and phase change latent heat of composite PCMs decreased with the increase of EG content, the variation of phase change temperature was negligible, and the thermal conductivities of composite PCMs increased linearly with the addition of EG content and density. In particular, the thermal conductivity of the composite PCM with 20 wt% of EG and 2 g/cm3of density was 4.937 W/(m K), which showed 701.1% higher than binary eutectic chloride. The heating and cooling rate of composite PCMs were higher than binary eutectic chloride, and the melting and freezing platform time also reduced with the addition of EG content.