Preparation of MXene-based aerogel-derived phase change materials for mitigating thermal runaway risk in batteries

Abstract

Phase change materials (PCMs) are an excellent option for heat storage and temperature stability; however, their low thermal conductivity and potential for leakage significantly hinder their broad application. Incorporating aerogel into PCMs is an effective method to enhance thermal conductivity and to mitigate leakage. In this study, we have developed a multifunctional aerogel skeleton, designated as MCPC, by freeze-drying a mixture of chitosan quaternary ammonium salt (CQS), polyethyleneimine (PEI), carbon nanotubes (CNTs), and MXene. This aerogel, upon adsorbing polyethylene glycol (PEG), exhibits high enthalpy efficiency, enhanced thermal conductivity, and robust electromagnetic shielding capabilities. The application of this aerogel on the battery surface can significantly delay the onset of thermal runaway and mitigate potential damage. Furthermore, the aerogel possesses the capabilities for photo-thermal, electro-thermal, and magneto-thermal energy conversion, broadening the potential applications of the composite PCM.