Polypyrrole nanocones (PNCs) were synthesized employing cyclic voltammetry (CV) on gold coated glass substrate in a single compartment electrochemical cell interfaced to electrochemical analyzer (CHI instrument, USA). The synthesis was carried out at different scan rates (0.001, 0.005, 0.01, 0.05, 0.1, and 0.5, V/s) and temperatures (room temperature, 15, and 10°C). The morphological and chemical characterization of the as-synthesized product was carried out using scanning electron microscopy (SEM) and Fourier Transform Infrared (FTIR) Spectroscopy, respectively. The morphology of the polypyrrole nanostructures is significantly influenced by the number of CV cycles and deposition temperature. The field emission (FE) measurements were carried out at the base pressure of 1×10^-8 mbar in a planar diode configuration. The emitters due to the polypyrrole nanostructures obtained for 5, 10, and 25 number of CV cycles, at the scan rate of 0.05 V/s exhibit turn on and threshold field values (applied electric field required to draw an emission current of 1 µA/cm² and 10 µA/cm² respectively) as 2.5, 5.6, 1.1 V/µm and 3.0, 5.9, 1.4 V/µm, respectively. Interestingly, the PNCs emitter (CV cycles ~ 25, scan rate ~ 0.05 V/s) delivered maximum emission current density of ~ 1021 µA/cm² at the applied electric field of 2.0 V/µm. The FE characteristics of the PNCs emitter are observed to be superior to other conducting polymer nanostructures and nanocomposite emitters. Furthermore, the PNCs electrode showed specific capacitance value of 120 F/g and moderate stability over ~1000 CV cycles. The present studies reveal that the polypyrrole nanostructures of desired morphology obtained under optimized process variables exhibit improved multifunctional behavuiour (FE and supercapacitance) and thus offer potential for practical applications.