Insights into Civilian Electromagnetic Absorption Materials: Challenges and Innovative Solutions

Abstract

The emergence and widespread adoption of fifth‐generation wireless technology in civilian sectors have advanced the information revolution, while simultaneously leading to a variety of negative impacts. Foremost issues in the civilian domain include electromagnetic (EM) pollution, interference, and the inefficient use of EM energy. Despite growing global awareness, progress in devising effective solutions is sluggish, underlining the complexity of these issues. The delay in addressing EM concerns arises from several factors, including a considerable gap in comprehensive understanding and the absence of a unified stance on these critical issues. Moreover, the emergence of new challenges like EM interference and energy inefficiency indicates a clear need for innovative ideas and approaches. Addressing these civilian issues extends beyond the inherent properties of EM absorbers, requiring combination of tailored macro‐structural designs and external energy field management for a comprehensive solution. This situation emphasizes the urgent need for diverse strategies and creative thinking to navigate the challenges posed by the civilian EM issues. This perspective underscores these identified challenges and systematically proposes practical approaches to each, aiming to foster both conversation and action in this crucial area. The insights provided are expected to substantially aid in confronting and alleviating these pressing EM concerns.

Cation Bimetallic MOF Anchored Carbon Fiber for Highly Efficient Microwave Absorption

“…Compared with similar EP composite materials using lowconcentration metal fillers or structural, CFM/EP has excellent compression and bending strength (Figure 6o). [26,[80][81][82][83][84][85][86][87][88][89][90][91][92] In summary, the CF@NiCoMOF-800 provides a promising solution for reducing the mass percent of carbon materials and specific surface area, maintaining excellent MA properties simultaneously eliminating the impact on mechanical properties.…”

“…To solve this problem, various impedance-matching layers of carbon materials were developed, such as conductive polymer, [10][11][12][13][14][15][16] semiconductors, [17][18][19][20][21][22] and magnetic particles. [23][24][25][26]28] For example, the impedance mismatch characteristics of carbon nanotubes (CNTs) can be effectively improved by the incorporation of polyaniline with an intermediate conductivity, the best MA performance was achieved when the mass percent was reduced to 10 wt.% compared with metal nanoparticles. [28] By anchoring Fe to graphene nanosheets, the mass percent can be reduced to 20 wt.% while the MA performance was optimized.…”

Urea-Assisted Green Synthesis of CeO2 Nanoparticles/Porous Carbon Composites for Microwave Absorption

“…Moreover, the growing needs of contemporary national security have emphasized the significance of ensuring the stealth and immunity of military equipment. 1 These factors are essential for minimizing the radar scattering cross section, protecting electromagnetic equipment from interference, and safeguarding people from electromagnetic radiation. Therefore, it is crucial to design and research lightweight, effective microwave-absorbing materials (MAMs).…”

“…However, these devices generate electromagnetic wave (EMW) pollution, which is extremely dangerous for people’s health. Moreover, the growing needs of contemporary national security have emphasized the significance of ensuring the stealth and immunity of military equipment . These factors are essential for minimizing the radar scattering cross section, protecting electromagnetic equipment from interference, and safeguarding people from electromagnetic radiation.…”

Mixed-Dimensional Assembly Strategy to Construct Reduced Graphene Oxide/Carbon Foams Heterostructures for Microwave Absorption, Anti-Corrosion and Thermal Insulation

“…As the continuous and rapid progress of electronic communication technology, the popular intelligent electronic equipment brings convenience to people's life. Meanwhile, it also hides serious electromagnetic (EM) pollution and threatens people's health [1][2][3]. Consequently, the focus on designing outstanding materials and structures to effectively improve EM wave (EMW) absorption performances has increasingly intensified.…”