Composite Material with Excellent Thermal Management and Self-Healing Performance for Battery Temperature Control and Human Thermal Therapy

Yongsheng Li, Xiao Wu, Lei Tang, Li Xie,Xianqing Zeng,ShuaiPeng Wang, Kai Liu, MingMei Xu,Changyu Tang,Wenbin Yang,DongLin Han

ACS APPLIED POLYMER MATERIALS(2024)

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Abstract
Inorganic phase-change materials are promising materials for realizing personal thermal therapy and thermal management of electronic devices owing to their advantages of high energy storage density and stable phase-change temperature. However, the poor flexibility and irrecoverable fracturing of inorganic phase-change materials are long-standing bottlenecks in achieving efficient thermal management. This study proposed a method for preparing self-healing and flexible sodium acetate trihydrate (SAT)/expanded graphite (EG)/borax/sodium carboxymethyl cellulose (CMC) (labeled as SEBC)-based polyacrylamide (PAM)/chitosan (CS)/SEBC hydrogel composites with a self-healing ability and a certain degree of flexibility by constructing PAM/CS flexible dual-networked hydrogels for thermal management. The cross-linked dual network was formed by PAM and CS-wrapped SEBC to prepare self-healing PAM/CS/SEBC hydrogel composites. A 50 wt % content of PAM/CS enabled the composite to exhibit excellent flexibility and 87.9% self-healing efficiency. The composites that were damaged and self-healed showed thermal/conductive properties and thermal stabilities close to those of the original composites, owing to their excellent self-healing ability. Furthermore, energy devices based on flexible PAM/CS/SEBC hydrogel composites were developed to realize personal thermal therapy and efficient battery thermal management. Overall, this study provides a promising route for the fabrication of flexible and self-healing inorganic phase-change materials for thermal management.
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Key words
sodium acetate trihydrate,flexibility,self-healing,personal thermal therapy,battery thermal management
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