High-precision 3D printed octet-truss microlattices for electrochemical energy storage devices

High-precision three-dimensional (3D) printing has enabled the fabrication of architected microlattices with complex geometries and tunable functionalities, offering new opportunities for electrochemical energy storage devices. In particular, 3D polymer octet-truss lattice frameworks exhibit exceptional mechanical robustness, structural regularity, and customizable porosity, making them promising candidates for electrode applications. However, current fabrication techniques often face challenges in achieving the required precision and structural integrity for advanced applications. In this study, projection micro stereolithography (PμSL) was utilized to fabricate high-resolution 3D electrode substrates based on octet-truss microlattices. The printed structures were systematically optimized for both mechanical stability and printing accuracy. Electrochemical plating and magnetron sputtering were employed as surface modification techniques to improve the physicochemical characteristics of the lattices and introduce lithium-affinitive functionality. The resulting 3D microlattice electrodes demonstrate high structural precision and enhanced electrochemical performance, highlighting their strong potential for integration into advanced lithium metal batteries and related energy storage systems.