针对有机相变材料在应用过程中存在低导热、易泄漏等问题,以聚乙二醇(PEG)1500为主体相变材料,通过熔融共混法混合膨胀石墨(EG)、纳米氮化铝(AlN),制备了形状稳定且高导热的PEG/EG/纳米AlN复合相变材料,通过扫描电子显微镜、傅里叶变换红外光谱仪、差示扫描量热仪、热重分析仪对复合相变材料的微观形貌、化学结构及热稳定性进行了分析,研究了EG和AlN的含量对复合相变材料性能的影响。结果表明:当EG和纳米AlN质量分数分别为10%、3%时,复合相变材料的热稳定性良好,蓄热效果最佳,潜热为123.6kJ/g,过冷度较PEG1500下降1.62℃,且复合材料的导热系数较纯PEG1500导热系数[0.56W/(m·K)]提高了约393%。
In order to solve the problems of low thermal conductivity and easy leakage in the application of organic phase change materials,this paper used polyethylene glycol (PEG) 1500 as the parent phase change material,and mixed expanded graphite (EG) and nano-aluminum nitride (AlN) by melt blending method to prepare PEG/EG/nano-AlN composite phase change materials (CPCMS) with stable shape and high thermal conductivity.The microstructure,chemical composition,and thermal stability of the prepared materials were analyzed by using scanning electron microscopy (SEM),Fourier transform infrared spectroscopy (FT-IR),differential scanning calorimetry (DSC),and thermogravimetric analysis (TGA).The effects of EG and AlN content on the properties of composite phase change materials were investigated.The results showed that when the mass fractions of EG and nano-AlN were 10% and 3%,respectively,the composite PCM exhibited excellent thermal stability and optimal heat storage effect,with a latent heat of 123.6kJ/g,and the supercooling degree was 1.62℃ lower than that of PEG1500.The thermal conductivity of the composite was 393% higher than that of pure PEG1500 [0.56W/(m·K)].
[1] Jiang Kun,Liao Gaoliang,E Jiaqiang,et al.Thermal management technology of power lithium-ion batteries based on the phase transition of materials:a review[J].Journal of Energy Storage,2020,32:101816.
[2] 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.
[3] Liu Feifei,Bao Rongqing,Cheng Xianfu,et al.Review on heat dissipation methods of lithium-ion powerbattery for vehicles under service conditions[J].EnergyStorage Science and Technology,2021,10(6):2269-2282.
[4] 赵明楠,孙锌,张铜柱.双碳目标下新能源汽车产业高质量发展的思考与建议研究[J].中国汽车,2022,29(7):27-32.
[5] 陈逸可.电动汽车锂电池温度控制研究[J].光源与照明,2021,28(2):93-94.
[6] Chung Y,Kim M S.Thermal analysis and pack level design of battery thermal management system with liquid cooling for electric vehicles[J].Energy Conversion and Management,2019,196:105-116.
[7] Chen Fenfang,Huang Rui,Wang Chongming,et al.Air and PCM cooling for battery thermal management considering battery cycle life[J].Applied Thermal Engineering,2020,173:115-154.
[8] Wang Jin,Li Yanxin,Zheng Dan,et al.Preparation and thermophysical property analysis of nanocomposite phase change materials for energy storage[J].Renewable and Sustainable Energy Reviews,2021,151:111541.
[9] Xie Yi,Guo Hongqiang,Li Wei,et al.Improving battery thermal behavior and consistency by optimizing structure and working parameter[J].Applied Thermal Engineering,2021,196:117281.
[10] Pang Xiaowen,HuoYutao,Fang Hui,et al.Analysis of temperature uniformity of electric vehicle battery system with swirling flow strengthened heat transfer[J].Applied Thermal Engineering,2021,193:116995.
[11] Liang J,Gan Y,Li Y.Investigation on the thermal perfor-mance of a battery thermal management system using heat pipe under different ambient temperatures[J].Energy Conversion and Management,2018,155:1-9.
[12] Lin Xiangwei,Zhang Xuelai,Liu Lu,et al.Optimization investigation on air phase change material based battery thermal management system[J].Energy Technology,2021,9(7):2100060.
[13] Lv Y,Yang X,Zhang G,et al.Experimental research on the effective heating strategies for a phase change material based power battery module[J].International Journal of Heat and Mass Transfer,2019,128:392-400.
[14] Weng J,Yang X,Zhang G,et al.Optimization of the detailed factors in a phase-change-material module for battery thermal management[J].International Journal of Heat and Mass Transfer,2019,138:126-134.
[15] Wu Weixiong,Wu Wei,Wang Shuangfeng.Thermal optimization of composite PCM based large-format lithium-ion battery modules under extreme operating conditions[J].Energy Conversion and Management,2017,153:22-33.
[16] Yan J,Li K,Chen H,et al.Experimental study on the application of phase change material in the dynamic cycling of battery pack system[J].Energy Conversion and Management,2016,128:12-19.
[17] 肖鑫,李传高,周俊杰,等.氮化硼强化聚乙二醇/膨胀石墨复合相变材料的制备与热性能[J].东华大学学报(自然科学版),2023,49(5):26-32.
[18] Yang Wensheng,Lin Ruheng,Li Xinxi,et al.High thermal conductive and anti-leakage composite phase change material with halloysite nanotube for battery thermal management system[J].Journal of Energy Storage,2023,66:107372.
[19] Qian Tingting,Li Jinhong,Xin Min,et al.Enhanced thermal conductivity of PEG/diatomite shape-stabilized phase change materials with Ag nanoparticles for thermal energy storage[J].Journal of Materials Chemistry A.Materials for Eergy and Sustainability,2015,3(16):8526-8536.
[20] Lv Y,Zhou W,Jin W.Experimental and numerical study on thermal energy storage of polyethylene glycol/expanded graphite composite phase change material[J].Energy & Buildings,2016,111:242-252.
[21] Wu F,Lin Z,Xu T,et al.Development and thermal properties of a novel sodium acetate trihydrate-Acetamide-micron/nano aluminum nitride composite phase change material[J].Materials & Design,2020,196:109113.
[22] 张国庆,张江云,王长宏,等.纳米AlN/石蜡复合材料的制备及相变传热特性[J].材料导报,2011,25(18):109-112.
[23] Leitão T F M,Ribeiro A M M,Cássio S D M,et al.The scherrer equation and the dynamical theory of X-ray diffraction[J].Acta Crystallographica Section A Foundations and Advances,2016,72(3):385-390.
PDF
