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Solid Polymer Electrolytes Derived from Polyphenols
Phone: (630) 415-0250
The objectives are the preparation and evaluation of new solid polymer electrolytes (SPEs), derived from polyphenols, which may be used in the development of improved light-weight solid-state lithium batteries that supply a high number of watt-hours in a small volume. Two types of phenol monomers containing polyether or perfluoroalkyl sulfonic acid segments para to the phenolic function will be synthesized. The former will be obtained by partial O-alkylation of hydroquinone, while the latter will be prepared by ring-opening of perfluoropropane sultone by 4-lithionanisole. Enzymatic polymerization of these monomers will be carrier out and both resulting polymers (I and II) will be lithiated prior to building a lithium laboratory cell. Another polymer (III) which contains both polyether and perfluorosulfonic acid moieties, will be prepared by O-alkylation of Polymer-II. The polyether segments will provide increased solubility and permit generation of an ion-conducting region for formation of a Li ion complex. The perfluoroalkylsulfonic acid segments in Polymer-Ii will reduce the basicity of phenoxide ion, while contributing to stabilization of lithium complex. The SPEs derived from these polymers should exhibit high ionic conductivity and improved mechanical properties.
* Information listed above is at the time of submission. *