###### Abstract  
The hydrothermal synthesis of a hierarchically organized nanocomposite based on nickel-cobalt carbonate hydroxide hydrate of composition M(CO\({}_{3}\))\({}_{0.5}\)(OH)-0.11H\({}_{2}\)O (where M is Ni\({}^{2+}\) and Co\({}^{2+}\)) and nickel-cobalt layered double hydroxides (NiCo-LDH) was studied. Using synchronous thermal analysis (TGA/DSC), it was determined that the material retained thermal stability up to 200 \({}^{\circ}\)C. The crystal structure of the powder and the set of functional groups in its composition were determined by X-ray diffraction analysis (XRD) and Fourier transform infrared spectroscopy (FTIR). The resulting hierarchically organized nanopowder was employed as a functional ink component for microplotter printing of an electrode film, which is an array of miniature planar structures with a diameter of about 140 \(\upmu\)m, on the surface of a nickel-plated steel substrate. Using scanning electron microscopy (SEM), it was established that the main area of the electrode \"pixels\" represents a thin film of individual nanorods with periodic inclusions of larger hierarchically organized spherical formations. According to atomic force microscopy (AFM) data, the mean square roughness of the material surface was 28 nm. The electrochemical properties of the printed composite film were examined; in particular, the areal specific capacitance at different current densities was calculated, and the electrochemical kinetics of the material was studied by impedance spectroscopy. It was found that the electrode material under study exhibited relatively low R\({}_{\rm s}\) and R\({}_{\rm c}\)t resistance, which indicates active ion transfer at the electrode/electrolyte interface. capbtabboxtable[][  
new electrode materials with high electrocatalytic activity and conductivity, as well as a developed specific surface area, in addition to improving the engineering and technological approaches to design and assembly. In addition, it is noted that the electrode materials should have a medium degree of crystallinity because well-crystallized structures have no ability to expand or contract during supercapacitor operation, which prevents the penetration of protons deep into the material and leads to diffusion difficulties, while amorphous materials demonstrate low values of electrical conductivity [7; 8]. In recent years, various classes of transition metal compounds (Ni, Co, Mn, Fe, Mo, and V), in particular, oxides [9; 10], hydroxides [11; 12], hydroxocarbonates [7; 13], sulfides [14; 15; 16], phosphates [17; 18], and composites based on them [19; 20; 21], have been considered as candidates for the role of supercapacitor electrodes with a pseudocapacitative effect. According to literature data [22; 23; 24], the layered hydroxides and carbonate hydroxide hydrates of nickel and cobalt are of particular interest from this point of view, since wide interplanar distance in their crystal structure can greatly facilitate the access of electrolyte ions into the inner structure of the material, increasing the number of active centers involved in the electrode. Furthermore, it is reported that Co(CO\({}_{3}\))\({}_{0.5}\)(OH) contains additional internal metallic bonds in its structure that promote electron transport and improve the conductivity of the final electrode [24]. Moreover, the presence of CO\({}_{3}\)\({}^{2}\)- groups in the composition of layered carbonate hydroxide hydrates increases the hydrophilicity of the material, which also has a positive effect on the rate of electron diffusion in its structure [25]. Thus, the formation of nanocomposites based on layered hydroxides and carbonate hydroxide hydrates of nickel and cobalt can contribute to combining their useful characteristics and obtaining new electrode materials with improved operating parameters.