Solid ionically conducting material, produced from a polymer and alkali metal salt and application as electrolyte

摘要

The subject of the invention is an ion-conducting solid material made from branched poly(ethyleneimine) and from a salt of lithium cations, in order to optimise the ratio of the number of nitrogen atoms contained in the polymer with respect to that of the lithium cations coming from the salt. The branched poly(ethyleneimine) may be plastified within a certain range of proportions of plasticiser. This type of material is used as electrolyte, in particular in electrochromic systems.