New lithium organic salts for promising polymer electrolytes

Abstract

In the plasticized and gel-like polymer, electrolytes containing such aprotic solvents as plasticizers, cations and anions of lithium salts are mobile. As a rule the transport number of lithium ions in these systems is far less than 1 (usually 0.5). Such a situation can result from the possibility of cation binding by polymer matrix polar groups (e.g., -Oin polyethylene oxide, -CN in polyacrylonitrile, -NR in polyamide, etc). In this case, an anion can contribute more to the conductivity than a cation can. The problems of the undesirable participation of anions in ion transport and decreasing reactivity of polymer electrolytes relative to the electrode materials can be solved by using lithium organic salts with large anions. This is illustrated by the increased interest in the application of new organic and inorganic lithium salts in the composition of polymer electrolytes: