以石蜡 (PW)为基体,膨胀石墨 (EG)为支撑材料,多壁碳纳米管 (WMCNTs)和碳纤维 (CF)为碳添加剂制备了PW/EG/WMCNTs/CF复合相变材料。采用扫描电子显微镜、差式扫描量热仪、X射线衍射仪、热导率分析仪对复合相变材料进行表征和测试。结果表明,CF与WMCNTs质量比为2∶3、WMCNTs质量分数为11.4%时,复合相变材料的渗漏率仅为1.12%,比PW/EG相变材料渗漏率降低了83.1%,其热导率为4.78W/ (m·K),为PW/EG相变材料热导率的2.69倍。将复合相变材料应用于锂离子电池,电池运行温度始终保持在50℃安全范围内。
Preparation of composite phase change materials using paraffin as matrix,expanded graphite as supporting material,multi-wall carbon nanotubes and carbon fiber as additives.It was characterized and tested by scanning electron microscope (SEM),differential scanning calorimeter (DSC),X-ray diffraction (XRD) and thermal conductivity tester.The results shown that when the mass ratio of CF to WMCNTs was 2∶3,and the mass fraction of WMCNTs was 11.4%,the leakage rate of phase change material was only 1.12%,which was 83.1% lower than that of PW/EG.The thermal conductivity was 4.78W/ (m·K),which was 2.69 times of paraffin wax/expanded graphite.Finally,the optimum carbon additive composite phase change material was applied to the lithium ion battery,and the operating temperature of the battery was kept in the safe temperature range of 50℃.
[1] Sharma A,Tyagi V V,Chen C R,et al.Review on thermal energy storage with phase change materials and applications[J].Renewable and Sustainable Energy Reviews,2009,13 (2):318-345.
[2] Jiang G,Huang J,Fu Y,et al.Thermal optimization of composite phase change material/expanded graphite for Li-ion battery thermal management[J].Applied Thermal Engineering,2016,108:1119-1125.
[3] Mazo M A,Tamayo A,Caballero A C,et al.Enhanced electrical and thermal conductivities of silicon oxycarbide nanocomposites containing carbon nanofibers[J].Carbon,2018,138:42-51.
[4] Xu B,Li Z.Paraffin/diatomite/multi-wall carbon nanotubes composite phase change material tailor-made for thermal energy storage cement-based composites[J].Energy,2014,72:371-380.
[5] 孙凯,晏凤梅,张步宁,等.膨胀石墨/石蜡复合相变储能材料的制备与性能研究[J].化工新型材料,2012,40 (8):148-150.
[6] Zhong Y,Guo Q,Li S,et al.Heat transfer enhancement of paraffin wax using graphite foam for thermal energy storage[J].Solar Energy Materials and Solar Cells,2010,94 (6):1011-1014.
[7] Sundarram S S,Li W.The effect of pore size and porosity on thermal management performance of phase change material infiltrated microcellular metal foams[J].Applied Thermal Engineering,2014,64 (1/2):147-154.
[8] 盛强,邢玉明,王泽.泡沫金属复合相变材料的制备与性能分析[J].化工学报,2013,64 (10):3565-3570.
[9] 程晓敏,向佳纬,喻国铭,等.硬脂酸甘油酯/泡沫金属相变材料储热性能[J].武汉理工大学学报,2015,37 (8):11-16.
[10] 吴淑英,汪南,朱冬生,等.纳米铜/石蜡复合相变蓄热材料的导热性能研究[J].化工新型材料,2012,40 (5):104-106.
[11] 陈杨华,杨皓月,郭文帅,等.石蜡/纳米铝在蓄能换热器中的热性能研究[J].化工新型材料,2016,44 (5):203-205.
[12] Xu B,Li Z.Paraffin/diatomite/multi-wall carbon nanotubes composite phase change material tailor-made for thermal energy storage cement-based composites[J].Energy,2014,72:371-380.
[13] Wang C,Cheng H,Hong C,et al.Lightweight chopped carbon fibre reinforced silica-phenolic resin aerogel nanocomposite:facile preparation,properties and application to thermal protection[J].Composites Part A:Applied Science and Manufacturing,2018,112:81-90.
[14] 刘菁伟,杨文彬,谢长琼,等.HDPE/EG/石蜡导热定形相变材料的制备及性能[J].材料工程,2015,43 (4):42-46.
[15] 徐斌,楼白杨,曹小海,等.纳米铜修饰多壁碳纳米管/石蜡相变驱动复合材料的制备及热性能[J].复合材料学报,2015,32 (2):427-434.
[16] 王大伟,余荣升,晏华,等.碳纤维/石蜡/膨胀石墨复合相变材料的制备及强化传热研究[J].材料导报,2014,28 (24):70-73.
[17] Bernardi D.A general energy balance for battery systems[J].Journal of the Electrochemical Society,1985,132 (1):5.
[18] Tian B,Yang W,Luo L,et al.Synergistic enhancement of thermal conductivity for expanded graphite and carbon fiber in paraffin/EVA form-stable phase change materials[J].Solar Energy,2016,127:48-55.
基金资助
国家自然科学基金(51762034);江西省自然科学基金(20181BAB206032)
PDF
(2703KB)
