Gel-polymer electrolytes based on polyurethane ionomers for lithium power sources

Abstract

Polyurethanes based on the aminoethers of ortho-phosphoric acid and polyisocyanates of an aliphatic nature were studied as a substrate for the preparation of a new polymer electrolyte.

Dielectric properties of organophosphorus polyurethane ionomers

“…Most likely, low molecular weight impurities diffuse. As shown earlier, 57 clusters with the participation of phosphate anions are formed in the bulk of AEPA-PU. The protons bound to them acquire mobility in the presence of liquids (Scheme 3).…”

“…In References 55–57, polyurethane ionomers based on the aminoethers of ortho‐phosphoric acid (AEPA) were synthesized. The synthesis of AEPA is based on the etherification reaction of ortho‐phosphoric acid (OPA) in the presence of tertiary amines.…”

“…On the contrary, the use of triethylamine (TEA) as a catalyst (Scheme 2) results in the etherification of OPA by polypropylene glycol (PPG), leading to the predominance of polyphosphate structures (EPA) 55–57 …”

“…According to Reference 57, the additional introduction of carboxyl groups into the composition of AEPA due to its interaction with phthalic anhydride (PA) enhances the ionomeric structure of the corresponding AEPA‐PU‐PA.…”

“…On the contrary, the use of triethylamine (TEA) as a catalyst (Scheme 2) results in the etherification of OPA by polypropylene glycol (PPG), leading to the predominance of polyphosphate structures (EPA). [55][56][57] Polyurethanes (EPA-PU) and polyurethane ionomers (AEPA-PU) based on the EPA and AEPA were obtained using polyisocyanates of an aromatic nature. In Reference 51, it was shown that the features of the chemical structure of AEPA-PU are the cause of the ionogenic phosphate group aggregation in the form of proton-conducting channels (Scheme 3).…”