Preparation and thermal properties of shape-stabilized phase change thermal storage materials with mesoporous confinement

HUANG Chao; DAI Zhiqian; LIN Wenye; SONG Wenji; WEI Gaosheng; GU Xiaobin; CUI Xinglan; NIAN Hongen; Amin Shahsavar

doi:10.11949/0438-1157.20260308

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Preparation and thermal properties of shape-stabilized phase change thermal storage materials with mesoporous confinement

更新时间：2026-06-08

- Preparation and thermal properties of shape-stabilized phase change thermal storage materials with mesoporous confinement
- CIESC Journal (2026)
- 作者机构：
  
  1.中国科学院广州能源研究所，广东广州510640
  2.广东工业大学土木与交通工程学院，广东广州510006
  3.华北电力大学，北京102206
  4.中国科学院青海盐湖研究所，青海西宁810008
  5.有研资源环境技术研究院（北京）有限公司高品质有色金属绿色特种冶金国家工程研究中心，北京100088
  6.北京科技大学冶金与生态工程学院，北京100083
  7.Department of Mechanical Engineering, Kermanshah University of Technology, Kermanshah 6715675420, Iran
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20260308
  CLC： TK 02
- Received：12 March 2026，
  
  Revised：2026-06-06，
  
  Accepted：08 June 2026，
- 稿件说明：
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HUANG Chao, DAI Zhiqian, LIN Wenye, et al. Preparation and thermal properties of shape-stabilized phase change thermal storage materials with mesoporous confinement[J/OL]. CIESC Journal, 2026.
DOI：

HUANG Chao, DAI Zhiqian, LIN Wenye, et al. Preparation and thermal properties of shape-stabilized phase change thermal storage materials with mesoporous confinement[J/OL]. CIESC Journal, 2026. DOI： 10.11949/0438-1157.20260308.

摘要

介孔二氧化硅是构筑高性能定型相变材料的理想载体之一，但相关研究仍面临储热容量不足、能量品位偏低以及热性能调控机制不明等问题。选取MCM-41、SBA-15、SBA-16和介孔纳米球（MSNs）等不同孔隙形貌的介孔二氧化硅，通过熔融浸渍法制备得到LiNO

-NaNO

中温定型复合相变材料，并对其热物理特性展开实验研究。结果表明，在80 wt%~90 wt%的相变介质负载率下，复合材料仍能保持优异的形状稳定性。其中，LiNO

-NaNO

/SBA-15和LiNO

-NaNO

/MSNs复合介质的相变潜热可达227.02 J/g和190.37 J/g，其热导率相较于纯盐最高分别提升6.41%和36.14%，并且在100次热循环和100h恒温熔融后储热性能损失均不超过3%。进一步研究发现，受介孔限域效应影响，LiNO

-NaNO

/SBA-15和LiNO

-NaNO

/MSNs复合介质在更低温度下可以发生熔化与凝固过程。此外，引入MCM-41可显著提升纯盐在固态阶段的比热容，其最大增幅达到12.08%。

Abstract

Mesoporous silica is widely regarded as an ideal porous carrier for fabricating high-performance shape stabilized phase change materials. However

current research is still constrained by issues such as low thermal energy quality

low energy density

and poorly understood mechanisms for regulating thermal performance. In this study

various mesoporous silica supports with distinct pore morphologies were employed

including MCM-41

SBA-15

SBA-16

and MSNs. Medium-temperature shape s

tabilized composite phase change materials

based on LiNO

-NaNO

eutectic salt

were synthesized via the melt impregnation method

followed by a systematic experimental investigation of their thermophysical properties. The results show that the composites exhibit exceptional structural stability

even at high salt loadings of 80~90 wt%. Notably

the phase change latent heats of the LiNO

-NaNO

/SBA-15 and LiNO

-NaNO

/MSNs composites reach 227.02 J/g and 190.37 J/g

respectively. Their thermal conductivities are enhanced by up to 6.41% and 36.14% compared to the pristine eutectic salt. Furthermore

the thermal storage performance degrades by less than 3% after 100 thermal cycles and 100 hours of isothermal melting. Further research revealed that

due to the mesoporous confinement effect

the LiNO

-NaNO

/SBA-15 and LiNO

-NaNO

/MSNs composite media can undergo melting and solidification processes at lower temperatures. Additionally

the incorporation of MCM-41 significantly improves the solid-state specific heat capacity of the pure salt

achieving a maximum increase of 12.08%.

关键词

Keywords

references

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