Kvasha A. Solid vitreous inorganic electrolyte for rechargeable lithium chemical power sources

The physical-chemical and electrochemical processes in lithium systems, which contain inorganic vitreous SE. The development SE having lithium ion conductivity for use in rechargeable lithium power sources; definition of optimum chemical structure of SE and way of manufacturing; an estab-lishment of physical-chemical and electrochemical properties of SE in conditions of work in contact with electrode materials lithium power sources. Methods of research: impedance spec-troscopy, cyclic voltamperometry, galvanostatic cycling, dif-ferential-thermal analysis and XRD analysis. Solid vitreous electrolytes (SE) in the system Li2O-Li2SO4-B2O3 with a high lithium oxide content have been synthesised. Solid electrolyte containing 66,7 mol. % Li2O has the highest ionic conductivity value (3,1•10-6 S·сm-1) in Li2O-Li2SO4-B2O3 glass - forming system. Solid electrolytes modified by molybdenum (VI) ox-ide increase the value of ionic conductivity, decrease activa-tion energy of ionic conductivity and electronic conductivity. Introduction of MoO3 results in decreasing the impedance of the SE/electrode interface, and in this case the contact angle of melt spreading of solid electrolyte decreases and wetting im-proves. Solid electrolytes have a complex of physical-chemical and electrochemical properties enabling their use in a solid-state lithium power sources. Solid electrolytes are electrochemically stable in the potential range 0,0-4,5 V. The developed laboratory prototype of lithium power source in-cluding the half-cell SE/ MnO2 can be efficiently cycled at ambient temperature. Sphere of use: development and manu-facture of lithium secondary power sources.