The National Centre for Research and Development



Small Grant Scheme; Level: post-doc; Discipline: Materials engineering; ID: 210120



Project title: Novel Polymer Electrolytes for Application in Lithium and Lithium-ion Batteries 


Acronym: BATLIT


Project Promoter: Warsaw University of Technology


Project cost (EUR): 77 095


Grant amount (EUR): 77 095

Duration: 24 months






Project summary:

The project concerns the development of new polymer electrolytes (in the form of thin membranes) of increased share of cationic conductivity. In the hitherto studies, anions are the dominating electric charge carriers, which leads to unfavorable salt concentration gradient and worsening of the battery characteristics. Achieving an increase in the lithium cations transference numbers values assures the batteries a longer operation time, smaller decrease in capacity, and greater current densities. The obtaining of such type of electrolytes is one of the conditions of the development of lithium-ion batteries predicted for charging electronic devices, in hybrid car engines and in large devices for storing energy acquired from renewable sources, among others.
Within this project it is expected to increase the share of cation conductivity of lithium electrolytes by reactions of complexing salt anions with boron or aluminum compounds showing Lewis acid properties. In addition, an increase in the degree of salt dissociation, decrease in the share of ion associates and increase in cation mobility are expected, which should assure higher ionic conductivity. The utilization as aluminum receptors of aluminum carboxylates with incorporated oligoether substituents which, as appears from the studies of the Principal Investigator, are very efficient anion traps, is planned. As boron derivatives, compounds containing fluorine substituents will be obtained, which due to the strong induction effect, increase the deficiency of electrons on the boron atom.
The complex salts obtained will be applied as components of solid and gel polymer electrolytes. For selected electrolytes, studies will be carried out on their flame-retardant properties by introducing ionic liquids. Electrochemical characterization of the electrolytes obtained will cover determination of ionic conductivity and electrochemical stability, as well as determination of lithium cations transference numbers.


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