Determination of LiCF(3)SO(3) and gamma-LiAlO(2) in composite PEO-based polymer electrolytes by flame atomic absorption spectrometry.
A simple and rapid method for the determination of LiCF(3)SO(3) and gamma-LiAlO(2) in composite PEO (poly(ethylene)oxide)-based polymer electrolytes, both in mixtures and thin films, is described. The method is based on the dissolution of LiCF(3)SO(3) in anhydrous ethanol at room temperature and subsequently dissolution of PEO in water for the separation of gamma-LiAlO(2). Determination of the lithium content in LiCF(3)SO(3) and gamma-LiAlO(2) was performed by flame atomic absorption spectrometry (FAAS). A fast and total recovery of the components is achieved, being within 99-100%. The analysis of variance (ANOVA) is used to estimate the contribution of variance of chemical analysis and sampling procedure to the total variance. The results from ANOVA show a high level of homogeneity of the samples.
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Divisione Tecnologie Energetiche Avanzate, Sezione R&S Conversione Elettrochimica dell'Energia, ENEA, C.R. Casaccia, via Anguillarese 301, I-00060, Rome, Italy.
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