[en] In the present investigation, La${}_2$ZnMnO${}_6$ nanoflakes have been synthesized by facile hydrothermal route. The powder X-ray diffraction confirms that the La${}_2$ZnMnO${}_6$ nanoflakes exhibit orthorhombic structure with Pnma symmetry with observed lattice parameters, a = 5.5318 Å, b = 5.5704 Å and c = 7.8261 Å. The selected area electron diffraction pattern analysis shows the formation of diffraction rings corresponding to orthorhombic structure. The specific surface area is estimated to be ~ 46 m${}^2$/g with average pore diameter as 12 nm. The presence of La${}^{3+}$, Zn${}^{2+}$, Mn${}^{3+/4+}$ ions on the surface of La${}_2$ZnMnO${}_6$ nanoflakes is observed via X-ray photoelectron spectroscopic analysis. The observed value of specific capacitance is 718.6 F/g at a scan rate of 1 mV/s. Furthermore, La${}_2$ZnMnO${}_6$ nanoflakes electrode has shown a retention of ~ 86% specific capacitance after 1000 cycles at a constant current density of 2.5 A/g.