As work suggests, the effective radius of cations should be estimated taking into account the solvation water. Keeping that in mind, we used the following parameters as the initial data for the lithium cation with a correction for solvation water: E ads = -1.27 eV, E bind,w = -0.33 eV, Li r  = 3.00 Å (including the solv- ation water (Tab. S7.1)), z 0 = 3.45 Å, μ and P are equal to zero; the parameters for the water molecule are E ads = -0.11 eV, r w = 1.41 Å, z 0 = 3.29 Å, μ = 2.19 D, P =7.21 Å 3 , E ww = -0.13 eV. We described the dipole moment and polarizability of all the anions by the expressions µ D =0.55598+353.79894•exp(-31.72148•ε LUMO ) and P=194.4018•exp(-ε LUMO /0.03634) 12.32756•ε LUMO +7.63034. The effective coordina-to ~1.6 V, which is higher than in pure water ). Such systems are used in supercapacitors. In practice, sulfonate is more often used in its acid form as an additive to electrolytes in electroplating and hydrometallurgy, and as an anion in redox flow batteries. EtSO 3 -has hardly ever been mentioned as an aqueous electrolyte in the literature, except for some references where it was mentioned as an electrolyte for zinc-ion batteries. 126 HCOO -as an electrolyte was mentioned in ref. ; in general, alkaline salts of carboxylic acids are often reported as potential electrolytes. The low values of the electrode water coverage in electrolytes are in most cases consistent with the electrochemical stability of the system, confirming that the coverage is one of the main parameters determining the potential window. In addition to the known systems, electrolytes with anions represented by sulfonic acid derivatives are potentially interesting as objects of further investigation. Of course, a comprehensive analysis of the ion suitability for electrolytes requires, in addition to the water coverage, evaluation of the electrochemical stability of the anion itself and its potential intermediates during electrochemical decomposition, as it was done in case of NH 2 SO 3 -. The use of the ε HOMO and ε LUMO parameters makes it possible to quickly evaluate the water coverage of the electrode and select the optimal anions, as it has been shown by a particular example. Due to the dependencies of the other electrochemical parameters (solvation energy, redox potential, etc.) on MO energy levels, such analysis can be performed in a comprehensive way, taking into account all the necessary parameters of cations and anions at the same time.