Carbon Material Films for Flexible and Efficient Electromagnetic Interference Shielding: A Review

ABSTRACT With the rapid development of technology such as the Internet and electronic devices, electromagnetic radiation pollution has become an increasingly prominent issue, which negatively impacts both human health and the normal operation of equipment. Especially with the rise of wearable and portable electronic devices, flexible and efficient electromagnetic interference (EMI) shielding materials are increasingly demanded. Flexible carbon‐based films, with their unique characteristics of high conductivity, good chemical stability, and excellent bending property, ensure stable EMI shielding effectiveness for equipment even under frequent bending and other conditions. In recent years, carbon‐based films have been studied in the field of EMI shielding with significant progress, particularly through the elegant design of various structures, such as the construction of porous structures, layered structures, and nanocomposite structures. This review primarily explores the importance of structural design in carbon material films and provides an explanation of the principles of EMI shielding, including the types of carbon‐based films, their fabrication methods, and the critical role of internal structural design. In addition, this review also analyzes the advantages of various carbon materials and their suitable structural forms, and based on the current state of research, discusses the future development directions and challenges of flexible carbon material films.