Electrochromic cell and process for their preparation

A process for preparing an electrochromic cell (1), comprising: is providing two transparent substrate plates (2.1, 2.2) each having on one side of a transparent, electrically conductive layer (3.1, 3.2) each having an external electrical connection (4.1, 4.2) connected or connectable, - - depositing an electrochromic material in an electrochromic layer (5.1) on at least one of the transparent electrically conductive layers (3.1, 3.2), - arranging an ion-conducting layer (6) containing polyvinyl butyral, and a lithium-containing electrolyte, on the electrochromic layer (5.1), characterized in that the deposition of the electrochromic material in the electrochromic layer (5.1) on at least one of the transparent electrically conductive layers (3.1, 3.2), by means of chemical vapor deposition wherein the ion conducting electrolyte layer (6) is prepared by polyvinyl butyral is dissolved in a solvent, wherein the solution then one or more of the compounds of tetraethylene glycol, other glycol ethers, esters or glycols, softening diesters of dicarboxylic acids is added with higher alcohols, phosphoric acid triesters and Glycerinester.