Multifunctional CuS/GO heterodimensional structure for microwave absorption, electromagnetic interference shielding, and energy storage device

The rapid development of information technology and the continuous advancement of industrialization have made the problems of electromagnetic (EM) pollution and energy shortage more and more prominent, which have become major challenges that need to be solved worldwide. Developing multifunctional EM materials has become a key solution for addressing these issues, advancing sustainable development, and establishing effective environmental protection systems. Herein, we prepare CuS/GO heterodimensional structures with both EM protection and electrochemical energy storage functions. Benefiting from the synergistic effects of the components and structure, the CuS/GO heterodimensional structure exhibits outstanding performance in microwave attenuation and sodium storage applications. The CuS/GO composite with a loading concentration of 55 wt.% achieves highly efficient EM wave absorption of − 62.56 dB, while the 75 wt.% composite demonstrates electromagnetic interference (EMI) shielding performance of more than 50 dB. In addition, in sodium-ion battery applications, the CuS/GO heterodimensional structure maintains a high reversible capacity of 377 mAh·g⁻¹ after 700 cycles. Importantly, based on this, an integrated multifunctional EM wave recovery device has been developed that can effectively convert harmful EM energy into electrical energy and store it. This provides a groundbreaking innovative strategy for the design of multifunctional devices in the fields of EM pollution control and energy applications.