This chapter provides a rich discussion on the latest advancement in energy storage technology using 3D printing of electro-active materials for the fabrication of flexible and/or miniaturized supercapacitors (micro-supercapacitors). A brief introduction on the topic is provided addressing the main concepts such as ink formulation and its parameters, printing technologies, and optimization steps. The following session covers the electroactive materials used for printing technology. This session highlights the properties of these materials and approaches that have been used for their synthesis and properly conversion into printable inks. A quick discussion about the characterizations is provided. An in-depth discussion regarding the latest advances in 3D printing technology for the fabrication of micro, asymmetric, and hybrid supercapacitors is provided. Supercapacitors based on carbon nanomaterials, transition metal oxides, transition metal dichalcogenides, MXenes, and composites of these materials are covered. Finally, a concluding session is provided which emphasizes the main challenges and the future perspectives in this field.