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多功能和灵活的相变复合材料用于离子电池的双模式热管理

Lichang Lu¹, Haosong He², Hongxu Guo¹

¹Department of Materials, Loughborough University, Loughborough, LE11 3TU, UK.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|August 4, 2025

概括

新的柔性复合材料为离子电池 (LIB) 提供双模式的热调节. 这些相变复合材料 (PCC) 提供冷时的加热和热时的冷却,确保在所有气候条件下更安全,更高效的电池运行.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
热力工程是热力工程中的一个.

背景情况:

变相材料 (PCM) 为热管理提供高潜热容量.
传统的PCM面临着诸如刚性,泄漏和热导率差等挑战.
有效的热管理对于离子电池 (LIB) 的性能和安全至关重要.

研究的目的:

为LIBs开发多功能,灵活和防泄漏的相变复合材料 (PCC).
为了使双模式热调节 (加热和冷却) 能够在所有气候条件下进行LIB操作.
在热管理应用中克服传统PCM的局限性.

主要方法:

制造灵活且防泄漏的PCC.
碳纳米填充剂的整合,以提高导热性.
COMSOL模拟来分析相变行为,温度和热量分布.
对朱尔加热,被动冷却,过热开关和温度传感功能的评估.

主要成果:

在零度以下的条件下,PCCs提供高效的焦尔加热 (22.5°C-1分) 和被动冷却,以达到最佳工作温度.
碳纳米填充剂的整合提高了240%的导热率,同时保持了结构完整性.
通过阳性温度系数 (PTC) 效应,PCC显示出作为过热开关和温度传感器 (7.2%/°C) 的功能.
模拟验证了PCC的热性能和在LIBs内的热分布.

结论:

开发的PCC为LIBs的先进,全气候热管理提供了有希望的解决方案.
灵活的,防漏的设计解决了传统PCM的关键局限性.
这些PCC通过双模式热调节和集成传感/开关功能来提高LIB的安全性和效率.

关键词:

电池的特征电池的特征双模式的热管理灵活的相变复合材料多功能复合材料多功能复合材料热建模热建模热建模

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