高校化学工程学报2016，Vol.30Issue(5)：1178-1183,6.DOI:10.3969/j.issn.1003-9015.2016.05.028
RT28/气相二氧化硅复合相变材料的制备及对锂离子电池的保温性能研究
Preparation of RT28/Hydrophobic-Fumed-Silica Composite Phase Change Materials and their Thermal Insulation Application in Lithium Ion Battery
摘要
Abstract
Composite phase change materials were prepared using hydrophobic fumed silica to absorb RT28, and their RT28 weight percentages were 60%, 70% and 80% respectively. Liquid leakage tests show that the samples with 60%(wt) and 70%(wt) RT28 have shape stability. SEM and Fourier transformation infrared spectroscopy (FT-IR) results indicate that the diameter of the sample is around 50~100 nm and RT28 entering into hydrophobic fumed silica is a physical absorption process. Thermal physical properties were measured by Hot Disk thermal constants analyzer and differential scanning calorimeter (DSC). The results show that increase of RT28 mass fraction can result in the decline of thermal conductivity, phase change enthalpy and specific heat capacity of the composite PCMs. The sample with 70%(wt) RT28 has high phase change enthalpy (155.4 J.g-1), high specific heat capacity (1.62 J.g-1.℃-1) and low thermal conductivity (0.17 W.(m.K)-1), which was chosen for further study on its thermal insulation performance in lithium ion battery. Cooling curves were obtained at low temperature conditions and the results show that the thermal insulation time of the lithium ion battery filled with the composite PCM increases by 160%, and the temperature of the battery is stable and less affected by environment temperature.关键词
RT28/气相二氧化硅/锂离子电池/保温Key words
RT28/hydrophobic fumed silica/lithium ion battery/thermal insulation分类
化学化工引用本文复制引用
温小燕,凌子夜,方晓明,张正国..RT28/气相二氧化硅复合相变材料的制备及对锂离子电池的保温性能研究[J].高校化学工程学报,2016,30(5):1178-1183,6.基金项目
国家自然科学基金(U1507201, U1407132)；广东省自然科学基金(2014A030312009)。 （U1507201, U1407132）
