| 115 | 0 | 138 |
| 下载次数 | 被引频次 | 阅读次数 |
相变材料具有能量储存和温度调节的优势，在热管理应用中展现出巨大的潜力。针对单一相变温区在宽温域工况下适用性不足的问题，本研究设计并制备了具有双相变温区的聚酰亚胺(PI)基复合相变材料。采用乳化-还原法法构筑具有高潜热的石墨烯纳米胶囊(C20RGO-N),并将其同时作为低温相变组分和导热填料，制备PI基复合气凝胶(PIC20RGO-N)。通过真空浸渍，将C20RGO-N与二十二烷(C22)按1∶1质量比负载于该气凝胶孔隙，制得复合相变气凝胶(PIC20RGO-N/C20RGO-N+C22)。石墨烯壳层有效阻隔两种烷烃互溶，使材料呈现低温吸热(C20RGO-N,36℃)和高温持续吸热(C22,44℃)的阶梯式热响应。得益于气凝胶的高孔隙率与石墨烯壳层的高导热性，该复合相变气凝胶的相变焓高达195 J/g,热导率为0.92 W/(m·K)。在双相变组分的协同作用下，该材料在不同温区均表现出优异的电池热管理性能：在27℃下，4.5 C倍率放电时可使电池表面温度降低12℃;在环境温度升至38℃时，相比仅包覆低温相变材料的体系温度降低7.6℃,有效解决了单一相变温区材料在宽温域工况下适应性不足的矛盾。
Abstract：Phase change materials(PCMs) offer advantages in energy storage and temperature regulation, demonstrating great potentials in thermal management applications. To address the limitation of a single-phase change temperature region under wide operating conditions, this work designs and prepares a novel polyimide(PI)-based composite PCM with dual phase change temperature regions. Graphene nanocapsules(C20RGO-N) with high latent heat were fabricated using an emulsion-reduction method. They were simultaneously used as the low temperature phase change component and thermally conductive filler to prepare the PI-based composite aerogel(PIC20RGO-N). C20RGO-N and docosane(C22) were loaded into the aerogel pores at a mass ratio of 1∶1 via vacuum impregnation to obtain the composite phase change aerogel(PIC20RGO-N/C20RGO-N+C22). The graphene shell effectively prevents the mutual dissolution of the two alkanes, enabling the material to exhibit a stepwise thermal response with endothermic heat absorption at a low temperature(C20RGO-N, 36 ℃) and sustained heat absorption at a high temperature(C22, 44 ℃). Benefiting from the high porosity of the aerogel and high thermal conductivity of the graphene shell, the composite phase change aerogel exhibits an excellent phase change enthalpy of 195 J/g and a thermal conductivity of 0.92 W/(m·K). Under the synergistic effect of the dual phase change components, the material exhibits excellent battery thermal management performance across different temperature ranges. At 27 ℃ and a discharge rate of 4.5 C, it reduces the battery surface temperature by 12 ℃. When the ambient temperature rises to 38 ℃, the temperature reduction is 7.6 ℃ compared to the system using only the low-temperature phase change material. This dual temperature region synergistic regulation strategy effectively addresses the limitation of single-phase change temperature region materials in terms of insufficient adaptability under wide operating conditions.
[1] Rufino C A Jr,Riva Sanseverino E,Gallo P,et al.Towards a business model for second-life batteries:barriers,opportunities,uncertainties,and technologies [J].Journal of Energy Chemistry,2023,78:507-525.
[2] Wang J,Miao Y E.Cellulose nanocrystals-based nanocomposites for sustainable energy storage technologies:from aligned microstructures to tailored performances [J].Composites Communications,2025,54:102258.
[3] Ping P,Dai X Y,Kong D P,et al.Experimental study on nano-encapsulated inorganic phase change material for lithium-ion battery thermal management and thermal runaway suppression [J].Chemical Engineering Journal,2023,463:142401.
[4] Zhang H R,Wang D N,Liu M X,et al.Enhanced interfacial thermal conductivity of functionalized boron nitride/polyvinyl alcohol/octadecane composite phase-change materials towards effective thermal management [J].Composites Communications,2024,52:102135.
[5] Samykano M.Advancing battery thermal management:future directions and challenges in nano-enhanced phase change materials-Based systems[J].Progress in Materials Science,2025,148:101388.
[6] 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.
[7] Najafi Khaboshan H,Jaliliantabar F,Abdullah A A,et al.Parametric investigation of battery thermal management system with phase change material,metal foam,and fins;utilizing CFD and ANN models [J].Applied Thermal Engineering,2024,247:123080.
[8] Zou D Q,Liu X S,He R J,et al.Preparation of a novel composite phase change material (PCM) and its locally enhanced heat transfer for power battery module [J].Energy Conversion and Management,2019,180:1196-1202.
[9] 姚锋华，潘丹，窦娟，等.氧化石墨烯接枝聚乙二醇单甲醚相变材料的制备及性能[J].东华大学学报(自然科学版),2021,47(6):7-13.
[10] Chen M Y,Yu Y,Ouyang D X,et al.Research progress of enhancing battery safety with phase change materials [J].Renewable and Sustainable Energy Reviews,2024,189:113921.
[11] Hu L,Liu Y F,Wang D J,et al.Feasibility analysis and feature comparison of cold thermal energy storage for off-grid PV air-conditioned buildings in the tropics [J].Energy Conversion and Management,2022,254:115176.
[12] Ye G H,Zhang G Q,Jiang L Q,et al.Temperature control of battery modules through composite phase change materials with dual operating temperature regions [J].Chemical Engineering Journal,2022,449:137733.
[13] Dai X Y,Ping P,Kong D P,et al.Heat transfer enhanced inorganic phase change material compositing carbon nanotubes for battery thermal management and thermal runaway propagation mitigation [J].Journal of Energy Chemistry,2024,89:226-238.
[14] Babapoor A,Azizi M,Karimi G.Thermal management of a Li-ion battery using carbon fiber-PCM composites [J].Applied Thermal Engineering,2015,82:281-290.
[15] Yang W S,Yao Z B,Li X X,et al.Advancing battery safety system:introducing eutectic hydrated salt composite phase change materials with two stage thermal storage properties [J].Green Energy & Environment,2026,11(1):148-168.
[16] Hu S H,Mao L K,Qin P,et al.Dual-temperature composite phase change material adapted for wide-temperature-range applications in battery thermal management [J].ACS Applied Materials & Interfaces,2025,17(51):69970-69982.
[17] Zhang Y,Zhang Q,Hou D S,et al.Tuning interfacial structure and mechanical properties of graphene oxide sheets/polymer nanocomposites by controlling functional groups of polymers [J].Applied Surface Science,2020,504:144152.
[18] Wang C X,Li W H,Wang K Y,et al.Dual three-dimensional ultra-flexible polymer-based phase change composite materials for body hyperthermia therapy:ultra-low leakage rate,high thermal conductivity,and photothermal conversion efficiency [J].Journal of Energy Storage,2025,118:116175.
[19] Ji R,Zhang Q F,Zhou F X,et al.Electrospinning fabricated novel poly (ethylene glycol)/graphene oxide composite phase-change nano-fibers with good shape stability for thermal regulation [J].Journal of Energy Storage,2021,40:102687.
[20] Huang Q,Wang S L,He J C,et al.Experimental design of paraffin/methylated melamine-formaldehyde microencapsulated composite phase change material and the application in battery thermal management system [J].Journal of Materials Science & Technology,2024,169:124-136.
[21] Yang Y K,Yin Q Q,Xu F,et al.Fabricated polyethylene glycol/hydroxylated carbon nanotubes shape-stabilized phase change materials with improving thermal conductivity [J].Thermochimica Acta,2022,718:179363.
[22] Deng C,Zhang X F,Peng J L,et al.In51Bi32.5Sn16.5@SiO2 microcapsules-based composite phase change materials with high thermal conductivity and heat storage density for electronics thermal management [J].Journal of Energy Storage,2024,86:111432.
[23] Zhang Q,Chen B,Wu K,et al.PEG-filled kapok fiber/sodium alginate aerogel loaded phase change composite material with high thermal conductivity and excellent shape stability [J].Composites Part A:Applied Science and Manufacturing,2021,143:106279.
[24] Tan N,Xie T,Feng Y,et al.Preparation and characterization of erythritol/sepiolite/exfoliated graphite nanoplatelets form-stable phase change material with high thermal conductivity and suppressed supercooling [J].Solar Energy Materials and Solar Cells,2020,217:110726.
基本信息:
DOI：10.19886/j.cnki.dhdz.2026.0187
中图分类号:TB34;TQ427.26;TM912
引用信息:
[1]尤嘉,贾绪平,刘增,等.聚酰亚胺基双温区相变复合气凝胶：协同调控电池热管理性能[J].东华大学学报(自然科学版),2026,52(03):102-110.DOI:10.19886/j.cnki.dhdz.2026.0187.
基金信息:
国家重点研发计划(2023YFB3811902); 国家自然科学基金(52322302)
2026-07-01
2026-07-01
2026-07-01