Fabrication of nickel-doped reduced graphene oxide nanocomposite films for optimizing battery thermal management

Abstract

The core role of wave-absorbing materials in battery management systems is to optimize the thermal management performance of batteries, thereby enhancing the overall stability and safety of the battery system. How to solve the contradiction between wide bandwidth and thin thickness of wave-absorbing materials is an urgent challenge that needs to be overcome. Herein, a nickel-doped reduced graphene oxide nanocomposite film for enhancing stability and accuracy of battery management system is synthesized using solvothermal method. The abundant dielectric loss and magnetic loss effects, as well as the good impedance matching and attenuation characteristics make the nickel-doped reduced graphene oxide nanocomposite film exhibit good electromagnetic wave absorption properties. It achieves a minimum reflection loss of −50.5 dB at a matching thickness and a frequency of 2.4 mm and 16.25 GHz, respectively. The effective absorption bandwidth is up to 9.75 GHz (8.25–18 GHz) when the film thickness is in the range of 1.0–3.0 mm. Radar cross section simulation results demonstrate that the constructed nanocomposite film can significantly reduce the reflected signals of microwaves compared to perfect electronic conductors. This work provides a reference for designing electromagnetic shielding and wave-absorbing materials for the stable and accurate operation of battery management system.