以石蜡(PW)作为相变基体,膨胀石墨(EG)和石墨烯协同增强导热,铝蜂窝作为结构增强材料,制备高性能、高导热的复合相变材料(CPCM)。在不同EG和石墨烯含量下,通过扫描电子显微镜、X射线衍射、差示扫描量热仪、热导率分析仪对所制相变材料进行表征与测试分析。结果表明:将EG质量分数控制为10%,复合相变材料的导热系数随着石墨烯质量分数的增加而不断增加,且PW、EG、石墨烯三者之间未发生化学反应;当石墨烯质量分数为2%时,PW/EG/石墨烯/铝蜂窝的导热系数为7.125W/(m·K);将制得的复合相变材料运用于方形锂离子电池,电池的工作温度控制在45℃以内的安全范围,这表明本实验制备的复合相变材料在一定范围内能取得较好的控温效果。
Paraffin wax (PW) was used as the phase change matrix,expanded graphite (EG) and graphene were synergistically enhanced heat conduction,and used aluminum(Al) honeycomb as a structural enhancement material to prepare high performance and high thermal conductivity composite phase change material(CPCM).Under different EG and graphene contents,CPCM was characterized and tested and analyzed by scanning electron microscope,X-ray diffraction,differential scanning calorimeter,and thermal conductivity analyzer.The results shown that the mass fraction of EG was controlled to 10%,the thermal conductivity of CPCM increased with the increase of the mass fraction of graphene,and there was no chemical reaction among PW,EG and graphene.When the mass fraction of graphene was 2%,the thermal conductivity of PW/EG/graphene/Al honeycomb was 7.125W/(m·K).The prepared CPCM was used in a square lithium-ion battery,and the battery's operating temperature was controlled within a safe range of 45℃,which shown that CPCM prepared in this experiment can achieve better temperature control effects within a certain range.
[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] Pielichowska K,Pielichowski K.Phase change materials for thermal energy storage[J].Progress in Materials Science,2014,65:67-123.
[3] 曹长斌,罗阳明,李文虎,等.聚乙二醇对沥青及其混合料储热性能的影响[J].化工新型材料,2013,41(4):137-139.
[4] 吕又付.圆柱形动力电源模组基于箱变材料的热管理研究及应用[D].广州:广东工业大学2017.
[5] 练晨,王亚楠,何鑫,等.相变材料在汽车动力电池热管理中的应用新进展[J].汽车技术,2019(2):38-47.
[6] Mulligan J C,Colvin D P,Bryant Y G.Microencapsulated phase-change material suspensions for heat transfer in spacecraft thermal systems[J].Journal of Spacecraft & Rockets,2012,33(2):278-284.
[7] Jilte R D,Kumar R,Ahmadi M H,et al.Battery thermal management system employing phase change material with cell-to-cell air cooling[J].Applied Thermal Engineering,2019,161:114199.
[8] 王文健.基于复合相变材料的锂离子电池热管理系统传热强化研究[D].徐州:中国矿业大学,2018.
[9] 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.
[10] 姜贵文.高导热复合相变材料的制备与动力电池热管理应用研究[D].南昌:南昌大学2017.
[11] Javani N,Dincer I,Naterer G F,et al.Heat transfer and thermal management with PCMs in a Li-ion battery cell for electric vehicles[J].International Journal of Heat and Mass Transfer,2014,72:690-703.
[12] 詹建,邹得球,李乐园.石墨烯及其复合材料的导热特性研究进展[J].功能材料,2015,46(S2):13-18.
[13] Stankovich S,Dikin D A,Dommett G H B,et al.Graphene-based composite materials[J].Nature,2006,442(7100):282.
[14] Fan He,Lin Ma.Thermal management of batteries employing active temperature control and reciprocating cooling flow[J].International Journal of Heat and Mass Transfer,2015,83:164-172.
[15] 高志勇,张晚佳.膨胀石墨的制备方法及应用研究进展[J].贵州大学学报(自然科学版),2018,35(6):19-25.
[16] 张昆.低硫膨胀石墨制备工艺与吸附性能研究[D].秦皇岛:燕山大学,2016.
[17] 郝勇敢,邵先坤,唐海娣,等.石蜡/TiO/活性炭复合相变材料的制备及其性能[J].材料工程,2016,44(11):51-55.
[18] 尹少武,李鸿坤,王立,等.80#石蜡/膨胀石墨定形复合相变材料的特性表征与分析[J].化工进展,2019,38(3):1494-1500.
[19] Warzoha Ron,Sanusi Omar,McManus Brian,et al.Development of methods to fully saturate carbon foam with paraffin wax phase change material for energy storage[J].Journal of Solar Energy Engineering,2012,135(2):21006-21006.
[20] 李琪.电动汽车锂离子电池液冷热管理研究[D].西安:长安大学,2019.
[21] Bernardi D,Pawlikowski E,Newman J.A general energy balance for battery systems[J].Journal of the Electrochemical Society,1984,132(1):5-12.
[22] 刘臣臻,张国庆,王子缘,等.膨胀石墨/石蜡复合材料的制备及其在动力电池热管理系统中的散热特性[J].新能源进展,2014(3):233-238.
[23] 王丹丹,陈威,李威.锂离子电池热性能的研究[J].能源研究与利用,2017(4):34-39.
基金资助
国家自然科学基金(51762034);江西省自然科学基金项目(20181BAB206032)
PDF
