Low-temperature preparation of solid-solid phase change polymer for thermal management modules

The high initiating temperature of polymerization up to 80-100 degrees C during the preparation of solid-solid phase change polymer (SSPCP) leads to the limitation of the embedding procedure during the construction of the battery modules. Herein, we develop a low-temperature preparation strategy for SSPCPs by introducing a redox initiation system to reduce the decomposition activation energy, thus realizing the procedure for embedding the SSPCP into a battery module. In addition to the intrinsic similar to 100% anti-leakage performance and ultrahigh heat tolerance up to 250 degrees C, the SSPCP/expanded graphite composite demonstrates a suitable phase change temperature of 47.8 degrees C, high thermal conductivity of 2.33 W m(-1) K-1, and latent heat of 99.6 J g(-1) for battery thermal management, thus delivering a lower maximum temperature (47.4 degrees C vs. 45.2 degrees C) for the battery module than traditional composite phase change material during 15 charge-discharge cycles. No leakage traces are detected in the SSPCP module. (C) 2021 Elsevier Ltd. All rights reserved.