"Heterodimensional Structure" Integrated Defect and Interface Engineering for Efficiently EMI Shielding and Electrochemical Response

Two colossal global challenges remain energy scarcity and environmental pollution, having evolved into problems that human society cannot ignore. Therefore, developing a material with efficient electromagnetic (EM) interference shielding and electrocatalytic properties has become imperative in promoting sustainable development and establishing environmental protection systems. Herein, a heterodimensional structure is prepared by assembling 3D spirally grown VS2 with 2D FeCo-LDH, which precisely manipulates macroscopic EM and electrochemical characteristics through defect and interface engineering. The results show that the heterodimensional structure presents an efficient shielding effectiveness of 30.2 dB at 18 GHz. Heterodimensional structure exhibits a low overpotential of 279 mV, achieving a current density of 10 mA cm-2 and a desirable stability. In addition, based on the unique electrochemical properties and EM response characteristics of the material, a special protective helmet is innovated. The helmet incorporating an autonomous oxygen supply, advanced pressure surveillance, and dynamic stealth supports a more exhaustive safeguard for missions amidst noxious gases, and situations necessitating clandestine operations. This research provides a new idea for the development of multifunctional EM active materials, showing great application prospects in the fields of aerospace engineering, energy, and EM security protection. VS2/FeCo-LDH heterodimensional struc-ture is prepared through a simple hydrothermal method. The electrocatalytic and EMI shielding performance of VS2/FeCo-LDH is optimized by defect and interface engineering. Based on its unique electrochemical and EM response characteristics, a special protective helmet with self-oxygenation supply, pressure sensing, and active stealth is designed, demonstrating infinite potential in electromagnetic protection, energy applications, and special services. image