Polyethylene glycol (PEG) is a commonly used phase change material for thermal energy storage. It can store amounts of heat in the process of phase transition, whereas the solid-to-liquid transition requires it to be form-stabilized before application. In this study, a phase change composite with form-stability and processibility is prepared by simply blending PLA with PEG at 180 °C, reaching a maximum PEG loading of 90 wt%. The preparation is easy, cheap, environmental-benign, and scalable. Besides, the obtained PLA/PEG (PLEG) composites are feasible for regulating the thermal behaviors of batteries operated at high rates, providing a low-cost and simple approach to improving the cyclability of fast-charging batteries.

中文翻译：

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可生物降解的聚乳酸/聚乙二醇混合物作为用于热能储存和管理的形状稳定的相变材料

聚乙二醇（PEG）是一种常用的热能储存相变材料。它可以在相变过程中储存大量的热量，而固相转变需要它在使用前保持形状稳定。在这项研究中，通过在180℃下将PLA与PEG简单混合，制备出具有形状稳定性和加工性能的相变复合材料，其最大PEG负载量达到90wt%。该制备方法简单、成本低、环境友好且可规模化。此外，所获得的PLA/PEG（PLEG）复合材料可用于调节高倍率电池的热行为，为提高快速充电电池的循环性能提供了一种低成本且简单的方法。