储能科学与技术2026，Vol.15Issue(2)：374-381,8.DOI:10.19799/j.cnki.2095-4239.2025.0878
MXene/硬脂酸定型相变复合材料的太阳能光热储能性能
Solar photothermal energy storage performance of MXene/stearic acid shape-stabilized composite phase change materials
摘要
Abstract
Conventional organic phase change materials(PCMs)often suffer from leakage during solid-liquid transitions and limited solar absorption,which restrict their practical application in thermal energy management.To address these challenges,this study presents a facile composite design combining chemical cross-linking and freeze-drying techniques.Stearic acid(SA),serving as the phase change component,is effectively encapsulated together with two-dimensional MXene nanosheets,which possess superior photothermal conversion properties,within a three-dimensional porous polyvinyl alcohol(PVA)network,resulting in a shape-stabilized photothermal composite PCM.Comprehensive characterization using scanning electron microscopy(SEM),X-ray diffraction(XRD),and Fourier-transform infrared spectroscopy(FT-IR)confirmed the uniform and stable immobilization of SA within the PVA matrix and demonstrated excellent compatibility among components.Thermal energy storage performance,thermal stability,and photothermal conversion were further evaluated using differential scanning calorimetry(DSC),thermogravimetric analysis(TGA),UV-vis-NIR spectrophotometry,and simulated solar irradiation.The incorporation of MXene increased light absorption by approximately 350 percent,enabling efficient solar harvesting and photothermal conversion.The composite maintained superior shape stability with no observable leakage for SA mass fraction up to 75%,while achieving a high latent heat of 112.56 J/g.In addition,it exhibited excellent thermal stability and cycling durability.This work establishes a robust and scalable strategy for fabricating leakage-proof,solar-responsive PCMs,providing a solid experimental foundation for advanced thermal energy management systems that integrate solar harvesting,thermal storage,and controlled energy release.关键词
MXene/硬脂酸/光热储能/定型相变材料Key words
MXene/stearic acid/photothermal energy storage/shape-stabilized phase change material分类
能源科技引用本文复制引用
尚蒙娅,郑露寒,高慧星,贾夏萱,陆亮,彭进,李俊壮,黄鹏东..MXene/硬脂酸定型相变复合材料的太阳能光热储能性能[J].储能科学与技术,2026,15(2):374-381,8.基金项目
河南省科技攻关项目(242102321066) （242102321066）
河南省高等学校青年骨干教师培养计划(21421260) （21421260）
河南省重点研发专项(241111233100) （241111233100）
河南工业大学本科生科研训练项目(KYXL2025104) （KYXL2025104）
河南工业大学大学生创新训练计划(202510463097). （202510463097）
