Solar photothermal energy storage performance of MXene/stearic acid shape-stabilized composite phase change materials

SHANG Mengya; ZHENG Luhan; GAO Huixing; JIA Xiaxuan; LU Liang; PENG Jin; LI Junzhuang; HUANG Pengdong

doi:10.19799/j.cnki.2095-4239.2025.0878

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Solar photothermal energy storage performance of MXene/stearic acid shape-stabilized composite phase change materials

Energy Storage Materials and Devices | 更新时间：2026-05-28

- Solar photothermal energy storage performance of MXene/stearic acid shape-stabilized composite phase change materials
- Energy Storage Science and Technology Vol. 15, Issue 2, Pages: 374-381(2026)
- 作者机构：
  
  1.河南工业大学材料科学与工程学院，河南郑州 450001
  2.江苏三菱磨料磨具有限公司，江苏盐城 224003
- 作者简介：
- 基金信息：
- DOI：10.19799/j.cnki.2095-4239.2025.0878
  CLC： TK 02
- Received：28 September 2025，
  
  Revised：2025-10-18，
  
  Published：28 February 2026
- 稿件说明：
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尚蒙娅, 郑露寒, 高慧星, 等. 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.

SHANG Mengya, ZHENG Luhan, GAO Huixing, et al. Solar photothermal energy storage performance of MXene/stearic acid shape-stabilized composite phase change materials[J]. Energy Storage Science and Technology, 2026, 15(2): 374-381.
尚蒙娅, 郑露寒, 高慧星, 等. 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. DOI： 10.19799/j.cnki.2095-4239.2025.0878.

SHANG Mengya, ZHENG Luhan, GAO Huixing, et al. Solar photothermal energy storage performance of MXene/stearic acid shape-stabilized composite phase change materials[J]. Energy Storage Science and Technology, 2026, 15(2): 374-381. DOI： 10.19799/j.cnki.2095-4239.2025.0878.

摘要

针对传统有机相变材料(PCM)在固-液相变过程中易发生泄漏，及本身不具备光吸收能力而难以直接高效利用太阳能这两大关键技术瓶颈，本研究发展了一种结合化学交联与冷冻干燥的简易复合策略。该策略成功将作为相变功能组分的硬脂酸(SA)与具有优异光热转换性能的二维MXene纳米片协同封装于聚乙烯醇(PVA)三维多孔网络骨架中，制备出了一种定型光热相变复合材料。利用扫描电子显微镜(SEM)、X射线衍射(XRD)和傅里叶变换红外光谱(FT-IR)等表征手段，系统分析了复合材料的微观形貌、晶体结构及化学组成，结果证实硬脂酸被均匀、稳定固定于PVA的多孔骨架内，且与基体间具有良好的相容性。进一步通过差示扫描量热(DSC)、热重分析(TGA)及紫外-可见-近红外光谱测试，并结合模拟太阳光源，定量评估了其储热性能、热稳定性及光热转换行为。研究结果表明，MXene的引入使光吸收率提升了约350%，实现了高效的太阳光捕获与光热转换。当SA含量低于75%时，复合材料在发生固-液相变时能有效避免液相泄漏，展现出优异的定型效果，其相变焓高达112.56 J/g，具有较高的储能密度，此外，复合材料具有良好的热稳定性和循环性能。本工作为解决相变材料的泄漏问题并同时赋予其高效转换能力提供了一种简便、可靠的材料设计与制备思路，为开发集太阳能捕获、热能存储与释放于一体的新型热能管理材料奠定了实验基础。

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

Keywords

references

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