相变储能材料六水氯化钙的储热性能优化研究  

Calcium Chloride Hexahydrate Phase Change Material with Enhanced Thermal Performance for Energy Storage

作　　者：张生娣 曾金波[1,2] 李翔 孙艳霞[1,2] 任秀峰 董生德[1,2,3] 祝绳龙 海春喜[1,2] 申月 ZHANG Sheng-di;ZENG Jin-bo;LI Xiang;SUN Yan-xia;REN Xiu-feng;DONG Sheng-de;ZHU Sheng-long;HAI Chun-xi;SHEN Yue(Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,810008,China;Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province,Xining,810008,China;University of Chinese Academy of Sciences,Beijing,100049,China)

机构地区：[1]中国科学院青海盐湖研究所,盐湖资源综合高效利用重点实验室,青海西宁810008 [2]青海省盐湖资源化学重点实验室,青海西宁810008 [3]中国科学院大学,北京100049

出　　处：《盐湖研究》2023年第2期19-24,共6页Journal of Salt Lake Research

基　　金：国家自然科学基金-柴达木盐湖化工科学研究联合基金(U1707603);中国科学院“西部之光”计划“西部青年学者”A类项目;青海省重点研发转化计划项目(2020-GX-108)。

摘　　要：六水氯化钙(CaCl_(2)·6H_(2)O)的相变温度约为29℃,相变潜热约180.0~190.8 J/g,因其潜热高,成本低,无毒等优点广泛应用于建筑材料中,但CaCl_(2)·6H_(2)O在实际应用中存在着储热性能差、衰减严重等缺点。通过差示扫描量热法(DSC)、原子力显微镜(AFM)、X射线衍射法(XRD)对比了CaCl_(2)·6H_(2)O在改性前后的潜热性能、形貌及晶体结构差异。结果表明,通过对CaCl_(2)·6H_(2)O的水含量进行精确调控,材料的相变潜热从158.6 J/g提升至194.8 J/g,潜热存储能力得到极大的提升。Calcium chloride hexahydrate(CaCl_(2)∙6H_(2)O)has a phase change temperature of approximately 29℃ and a phase change latent heat of about 180.0-190.8 J/g.It is widely used in building materials owing to the high latent heat,low cost and non-toxicity.However,CaCl_(2)∙6H_(2)O has some disadvantages in practical applications,such as poor heat storage performances and serious degradation.Characterized by differential scanning calorimetry(DSC),atomic force microscopy(AFM)and X-ray diffraction(XRD),the latent heat storage capacities,morphologies,and structures of CaCl_(2)∙6H_(2)O before and after modification were compared.The results show that the latent heat storage capacity has been improved significantly,from the initial value of 158.6 J/g to 194.8 J/g,through precise water control in CaCl_(2)∙6H_(2)O.

关 键 词：相变储能材料 水合盐 六水氯化钙 步进稀释法 潜热存储能力 

分 类 号：TB34[一般工业技术—材料科学与工程]