摘要
以石蜡(PW)为相变材料、膨胀石墨(EG)为导热增强剂和定形材料、铝蜂窝为导热和结构强度增强材料,制备了铝蜂窝增强EG/PW复合材料板。通过X射线衍射仪、红外光谱和差示量热等手段分析了铝蜂窝增强EG/PW复合材料的物相、化学结构和相变行为,测试了导热系数,并对比了PW和铝蜂窝增强EG/PW复合材料对动力锂电池的控温散热效果。结果表明:EG与PW之间未发生化学反应,EG/PW复合材料的相变潜热略低于理论计算值,过冷度变小;其导热系数随EG含量的增加而增大;与PW相比,铝蜂窝增强EG/PW复合材料对动力锂电池具有良好的控温散热效果。
A new kind of aluminum honeycomb-enhanced expanded graphite(EG)/paraffin wax(PW)composite material was prepared for Li-ion battery thermal management,in which PW was chosen as phase change material,EG as the promoter of thermal conductivity and shape-stabilized material,and aluminum honeycomb as the material-enhanced in terms of thermal conductivity and structural strength.The phase and chemical structure,and phase transition behavior of EG/PW were analyzed by XRD,FT-IR and DSC.The thermal conductivity and structural strengthen of composite were measured.The effect of EG/PW on controlling temperature rising of Li-ion battery was investigated.The results showed that:there was no chemical reaction between EG and PW.The phase change latent heat of EG/PW was a little lower than the calculated value based on the mass fraction of PW,and it's super-cooling was also decreased in comparison with that of PW.The thermal conductivity of EG/PCM increased with an increase in EG content.Compared to PW,EG/PW composite exhibited outstanding temperature-controlling performance for Li-ion battery.
作者
李敬会
姜贵文
黄菊花
Li Jinghui;Jiang Guiwen;Huang Juhua(Department of Materials Forming & controlling Engineering,Nanchang University,Nanchang 330031;School of Physics and Electronic Information,Shangrao Normal College,Shangrao 330041)
出处
《化工新型材料》
CAS
CSCD
北大核心
2018年第8期89-92,共4页
New Chemical Materials
基金
江西省教育厅科技项目(KJJ170930)
国家自然科学基金(51762034)
关键词
膨胀石墨/石蜡复合材料
铝蜂窝
导热系数
抗压强度
控温性能
EG/PW composite
aluminum honeycomb
thermal conductivity
structural strengthen
temperaturecontrolling performance