Review of Advanced Graphene-Based Hybrids for High-Performance Electromagnetic Interference Shielding

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External strong electromagnetic interference (EMI) often induces signal drift or noise in current sensors, thus affecting their detection sensitivity and long-term stability. Constructing high-performance EMI shielding materials around current sensors has become an effective strategy to enhance the EMI resistance ability. Traditional metallic shielding materials with excellent electrical conductivity face high density, corrosion, and secondary reflection, limiting their practical applications. In contrast, carbon nanomaterials, particularly graphene, have emerged as promising next-generation EMI shielding materials due to their flexibility, thermal conductivity, electrical conductivity, and micro/nanopore structure. In this review, we summarize the multiple EMI shielding mechanisms, such as reflection loss, absorption loss, and multiple internal reflections, for graphene-based hybrids. More importantly, we highlight advances in improving the EMI shielding performance of graphene-based hybrids through microstructural engineering, incorporation of magnetic nanoparticles, and construction of heterointerfaces to achieve optimized impedance matching and synergistic loss mechanisms. Graphene-based porous, layered, and hierarchical composites demonstrate significant potential for broadband, high-efficiency EMI shielding in flexible and multifunctional applications.