Wide-temperature-range high-specific-heat composite phase change energy storage material and preparation method thereof

By combining phase change matrix, molten salt matrix, polyethylene glycol copolymer modified components and dispersing aids, a wide-temperature-range high specific heat capacity energy storage material is formed, which solves the problems of low specific heat capacity, narrow phase change temperature range and poor thermal stability in the existing technology, and achieves high energy storage density and wide temperature range adaptability, which is suitable for multiple energy storage fields.

CN122405233APending Publication Date: 2026-07-17GUANGXI COLLEGE OF WATER RESOURCES & ELECTRIC POWER
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Patent Information

Application Number
CN202610565211.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-27
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing phase change energy storage materials have low specific heat capacity, narrow phase change temperature range, are prone to phase separation and have poor thermal stability. Their preparation process is complex, making it difficult to meet the requirements of high energy storage density and wide temperature range energy storage temperature control, and they are not suitable for large-scale production.

Method used

A wide-temperature-range high specific heat capacity energy storage material is formed by combining phase change matrix, molten salt matrix, polyethylene glycol copolymer modified components and dispersing aids through multi-element eutectic composite. Ultrasonic dispersion and simple preparation process are used to ensure component uniformity and thermal stability.

Benefits of technology

It significantly improves specific heat capacity and thermal storage density, broadens the phase change temperature range, and enhances thermal stability and cycle performance, making it suitable for multiple energy storage fields such as power peak shaving, new energy storage, and industrial waste heat recovery.

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Abstract

本发明公开一种宽温区高比热容复合相变储能材料及其制备方法。所述宽温区高比热容复合相变储能材料包括以下质量百分比的组分：相变基质 25%～40%、熔盐基质 45%～60%、聚乙二醇或其共聚物改性组分 8%～15%、分散助剂 0.5%～2%。所述制备方法包括以下步骤：（1）原料预处理；（2）熔盐基质熔融；（3）改性组分共混；（4）超声分散；（5）冷却定型；（6）后处理与包装。本发明首次提出以相变基质与熔盐基质为复合相变基质，以聚乙二醇或其共聚物为改性组分制备宽温区高比热容相变储能材料的体系，该体系通过组分间的协同作用，实现了比热容提升>20%、相变温区拓宽>40%的技术突破。
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