Electromagnetic shielding, resistance temperature-sensitive behavior, and decoupling of interfacial electricity for reduced graphene oxide paper

Abstract

Electromagnetic shielding behavior, resistance temperature-sensitive behavior, interfacial electricity, and their variations with heating treatment of the reduced graphene oxide (RGO) paper are of concern. Herein, self-assembling RGO papers were prepared by solution-phase deposition method. An electromagnetic shielding efficiency (EMSE) of 64 dB shielding (corresponding to a SE/Grammage of 7032 dB/(g/cm2)) covering X-band (8–12 GHz) were obtained. In addition, resistance temperature-sensitive behavior of RGO paper is investigated, and equivalent circuit model is established to decouple interface electricity. The relative resistance variations of RGO paper is caused by the temperature, and the value of ∆R/R0 drops by around 36% when the RGO paper temperature increase from 200 °C to 800 °C. This graphene-based paper provides a simple experimental approach to prepare graphene papers with remarkable electromagnetic shielding performances. More importantly, a qualitative decoupling analysis method is provided for the study and analysis of interfacial electricity. These results and decoupling method can provide useful data and method for carbon-based microwave blockers, sensors and other technologies.