Bio-Based Eutectic Composite Phase Change Materials with Enhanced Thermal Conductivity and Shape Stabilization for Battery Thermal Management

作     者：Su, Yanghan Zhou, Fei Shen, Junjie Chen, Xing Xu, Xiaobin Shi, Shaojun Wang, Xiaolin 

作者机构：State Key Laboratory of Mechanics and Control of Aerospace Structures Nanjing University of Aeronautics and Astronautics Nanjing210016 China College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and Astronautics Nanjing210016 China Jiangsu Lab of Advanced Functional Material Changshu Institute of Technology Changshu215500 China School of Engineering University of Tasmania HobartTAS7005 Australia 

出 版 物：《SSRN》 

年 卷 期：2024年

核心收录：

主　　题：Aluminum nitride 

摘      要：Organic phase change materials (PCMs) are commonly used for battery thermal management. Organic petroleum-based PCMs such as paraffin have an adverse effect on environment. Fatty acids as environmentally friendly bio-based PCMs, have enormous potential in sustainable development strategies. Nevertheless, the application of fatty acids in battery thermal management (BTMS) is restricted by the leakage of liquid PCM, poor thermal performance and the improper phase change temperature. We proposed a novel bio-based eutectic composite phase change materials (CPCM) with enhanced thermal conductivity and excellent shape-stabilization, composed of ethylene-vinyl acetate (EVA), Aluminum nitride (AlN), and the eutectic PCM of Lauric acid (LA) and Stearic acid (SA). Significantly, the screened eutectic PCM of LA-SA possesses a suitable phase change temperature range corresponding to the battery operating temperature, and long-term thermal cycling stability of up to 100 cycles. And the cross-linked structure of EVA effectively encapsulated the eutectic PCM, whose mass only lost below 4% after 24 hours heating at 80 °C. Simultaneously, the introduction of AlN greatly improved the heat transfer ability and mechanical properties. LA-SA/EVA/AlN composites with 5wt% AlN has adequate latent heat of 107.94J/g and high thermal conductivity of 0.726 W/ (m·K). The discharging-charging test was finally performed to evaluate the temperature control ability of CPCM. It suggested that the CPCM incorporated with AlN is capable effective cooling battery and dissipate energy inside PCM rapidly. © 2024, The Authors. All rights reserved.