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Thermal-Conductivity-Enhancing Copper-Plated Expanded Graphite/Paraffin Composite for Highly Stable Phase-Change
Jiasen Yan1, Xianying Han1, Zhaohan Dang1
1Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology, School of New Materials & Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617, China.
Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
|September 25, 2023
Summary
Copper-plated expanded graphite enhances paraffin/expanded graphite phase change materials for improved thermal conductivity in lithium-ion battery thermal management. This boosts performance without compromising heat storage or stability.
Area of Science:
- Materials Science
- Energy Storage
Background:
- Paraffin (PA)/expanded graphite (EG) composite phase change materials offer cost-effectiveness and good thermal properties.
- Improving thermal conductivity is crucial for PA/EG applications in power lithium-ion battery thermal management systems.
Purpose of the Study:
- To enhance the thermal conductivity of PA/EG composite phase change materials.
- To investigate the use of copper-plated expanded graphite (CPEG) as a thermal conductivity enhancer.
- To evaluate the performance of the modified composite in power lithium-ion battery thermal management.
Main Methods:
- Preparation of 3D porous CPEG via electroless copper plating.
- Incorporation of CPEG into PA/EG composite materials, replacing a portion of EG.
- Optimization of composite composition (80% PA-14% EG-6% CPEG).
Main Results:
- Significantly increased thermal conductivity (11 to 16.5 times that of paraffin) with minimal copper content (0.768 wt%).
- Maintained latent heat and thermal cycling stability.
- Demonstrated effective temperature control for power lithium-ion batteries.
Conclusions:
- CPEG is an effective additive for enhancing the thermal conductivity of PA/EG phase change materials.
- The optimized PA/EG/CPEG composite shows promise for advanced thermal management in lithium-ion batteries.
- This modification offers a viable solution for improving battery safety and performance.
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