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Phase Changes

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Author Spotlight: Optimization of Airflow Velocities in Battery Cooling Systems for Enhanced Thermal Performance and Reduced Energy Consumption

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Dual-Temperature Composite Phase Change Material Adapted for Wide-Temperature-Range Applications in Battery Thermal

Shuheng Hu¹, Liangke Mao¹, Peng Qin^2,3

¹School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, PR China.

ACS Applied Materials & Interfaces

|December 11, 2025

Summary

This summary is machine-generated.

A new composite phase change material (CPCM) offers advanced thermal management for lithium-ion batteries. This material effectively cools batteries during operation and prevents thermal runaway propagation.

Keywords:

battery thermal management composite phase change material dual phase transition temperature expanded graphite suppression of thermal runaway wide temperature range

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

Area of Science:

Materials Science
Electrochemistry
Thermal Engineering

Background:

Lithium-ion batteries require efficient thermal management for safety and performance.
Wide operating temperature ranges and thermal runaway events pose significant challenges.

Purpose of the Study:

To develop a novel composite phase change material (CPCM) for dual-temperature thermal management of lithium-ion batteries.
To enhance battery safety by mitigating thermal runaway propagation.

Main Methods:

Fabrication of a CPCM using an expanded graphite matrix with paraffin (~45 °C) and potassium alum (~90 °C).
Characterization of thermal properties, including latent heat and thermal conductivity.
Experimental testing of CPCM performance in lithium-ion batteries under various discharge rates and thermal runaway simulations.

Main Results:

The CPCM exhibited two distinct phase change platforms and a high latent heat (211.4 J/g).
Enhanced thermal conductivity of 2.53 W/(m·K).
Reduced maximum battery temperature by ~10 °C and improved temperature uniformity (ΔT < 2.2 °C).
Significantly lowered peak temperature of adjacent cells by ~134 °C during thermal runaway, delaying heat propagation.

Conclusions:

The developed CPCM provides effective cooling at normal operating temperatures.
The material acts as a robust thermal barrier, enhancing safety under extreme conditions.
This offers a dual-function material solution for advanced lithium-ion battery thermal management.