Abstract

Three-dimensional (3D) printing allows freeform production and rapid prototyping. It covers from macroscale to nanoscale, being capable of fabricating either a single component or multicomponents for an integrated device. It has been applied to the fabrication and optimization of flexible energy devices because it offers direct construction of optimized architectures with interconnected porosity and controlled chemistry, which are of great importance for energy devices. This addresses some issues that conventional manufacturing technologies suffer from, such as poor transport kinetics, poor reliability, and low material utilization efficiency. This chapter summarizes the recent progress on 3D-printed flexible energy devices. It covers typical types of 3D-printing techniques, a brief introduction of flexible energy devices, and the related applications of 3D printing (choice of material, architectural designs, and performance metrics). Future perspectives with potential challenges and their wider adoption are also discussed.