Thioaluminate Polymer Complexes as Single-Ionic Solid Electrolytes

Abstract

To improve the conductivity of recently reported single-ionic lithium orthoaluminate complex polymer electrolytes, the structure of the complex unit was changed from [Al(OR)4]- to [Al(SR)4]-, carrying a larger anion radius. The ionic conductivity of such thioaluminate polymer complexes was about 10-5 S cm-1at room temperature, which was about 102 times higher than that of previously reported aluminate complexes. The single-ionic nature of thioaluminate polymer complexes was confirmed by transport number.