CNT@MXene porous composite PCM based thermal management for lithium-ion battery system

Phase change materials (PCM) battery thermal management system has been studied widely because of its higher heat storage capacity, low cost, and perfect chemical stability. However, pure phase change materials such as paraffin wax has low conductivity, leading to the system failure. Hence, it is necessary to develop an easy-to-pour, high-thermal-conductive and low-density material to be applied in battery thermal management. This paper introduced a new CNT@MXene aerogel to improve the system thermal conductivity. Characterizations and battery cycling test were conducted to verify the effectiveness. It is found that the prepared material has a high thermal conductivity, good 3D porous structure and excellent thermal stability. The designed thermal management system demonstrates rapid improvement on the battery temperature distribution so that the battery aging rate is reduced, extending the lifespan by 28.13 %, 18.92 %, and 11.83 % under 4C, 3C, and 2C rate conditions, respectively. The designed battery thermal management system in this study shows great potential for application in electric vehicles and hybrid electric vehicles to prolong the life span of the battery pack.