U.S. Patent 10,396,329 “BATTERY SEPARATOR MEMBRANE AND BATTERY EMPLOYING SAME” was issued on August 27, 2019 to Dioxide Materials. It claims a battery comprises a separator membrane comprising an ion-conducting polymeric composition comprising a copolymer of Ra-Rs and Rb. Ra and Rb are each selected from the group consisting of linear alkyls, branched alkyls, cyclic alkyls, heteroalkyls, aryls, heteroaryls, alkylaryls, and heteroalkylaryls. Rs is a positively charged amine group or a positively charged phosphene group. The copolymer comprises at least 3% of each Ra and Rb by weight. Ra and Rb are different chemical constituents, and Ra-Rs is not vinylpyridine.
For the past nine years, Dioxide Materials has been highly focused on helping to build a sustainable future through innovative green technology. The company has also developed Sustanion membranes, which are the only anion exchange membranes that offer long-term solutions for electrochemical conversions in CO2 and water electrolysis. Whereas most current technologies treat CO2 as a liability that must be removed at a very high cost, the Boca Raton company sees it as a valuable feedstock for renewable fuels and chemicals. Dioxide’s vision is to eventually recycle CO2 back to fuels, using renewable energy as an input which can be used as a feedstock that does not compete with the food supply.