3D printing method is one of the best techniques to control the pore size and porosity up to a desired range improving its sensing and energy storage behavior. The polymer composite filament has been developed from the extrusion process it is further molded for containing proper electrical conductivity properties. Further, 3D printing technology is applied to fabricate sensor and energy storage devices. The filaments obtained from the extruder is passed through the 3D printer and various types of designs are made. The porous sizes will be controlled by applying different designs to optimize the best properties of sensing and energy storage properties. Pore size and its distribution are two of the most important parameters to be considered for both sensor and energy storage performance. This is the additional advantage of using 3D printing than the conventional die press method.