Porous nanofibric network of spinel CoMn2O4 (CMO) are fabricated by facile electrospinning process and characterized by XRD, BET, TGA, FFIR, FESEM, TEM, XPS techniques. CMO nanofibers are employed as :supercapacitor electrode for first time which exhibits high specific capacitance (C-s) of 320(+/- 5) F g(-1) and 270( 5) F g(-1) at 1 A g(-1) and 5 A g(-1), respectively in 1 M H2SO4. CMO nanofibers exhibit excellent cyclability (till 10,000 cycles @ 5 A g(-1)). To examine practical performance, solid-state symmetric supercapacitor (SSSC) is also fabricated using PVA-H2SO4 as gel electrolyte. The SSSC evinces high energy density of 75 W h kg(-1) (comparable to Pb-acid and Ni-MH battery) along with high power density of 2 kW kg(-1). Furthermore, a red colored LED (1.8 V @ current 20 mA) was lit for 5 min using single SSSC device supporting its output voltage of 2 V. This high performance of CMO in both aqueous and SSSC is attributed to one dimensional nanofibers consisting of voids/gaps with minimum inter-particle resistance that facilitates smoother transportation of electrons/ions. These voids/gaps in CMO (structural as well as morphological) act as intercalation/de-intercalation sites for extra storage performance, and also works as buffering space to accommodate stress/strain produced while long term cyclings. (C) 2016 Elsevier B.V. All rights reserved.