The aim of study is the synthesis of multi-walled carbon nanotubes (MWCNT) functionalized residues of organophosphate selenoacid as components of electrode materials in lithium-ion batteries. The reaction for 3 days under argon using tetrahydrofuran as solvent was carried out. The product was purified in two steps by washing with deionized water and methanol. After completed the purification the EDS study with the aim of determining the presence of selenium and phosphorus atoms was carried out. Thermal studies (TG/DSC), SEM microscopy, structure analysis (SEM/EDS) and FTIR spectroscopy of native and MWCNT functionalized using the selenoorganic salts were made. Voltammetric characteristics and the charge-discharge process were measured. The resulting material was testing in Swagelok-type cell. The cells consisted of a working electrode (functionalized MWCNTs), microfiber separators soaked with electrolyte solution and electrode LiCoO2. The electrolyte solution was 1 M LiPF6 in prophylene carbonate. Electrochemical study was performed on the cells at room temperature with a CH Instruments Model 600E potentiostat/galvanostat. The realization of these studies should lead to determining the synthesis of main precursors of electrode based on "covalent" functionalization of MWCNT by organophosphate salts containing selenium atoms. This type of the electrode cells are effective systems for electrochemical reactions, increasing capacity and service life of battery and friendly for the environment because those systems are biodegradable. As a consequence, it should lead to the elimination of the battery based on chromium and cobalt ions.