Solid Polymeric Electrolytes Networks of Hydroxypropyl Cellulose with Jeffamine
Gilmara O. Machado, Agnieszka Pawlicka and Massami Yonashiro
Hydroxypropylcellulose (HPC) based solid polymeric electrolytes (SPE) were obtained by oxidation, grafting and lithium salt addition processes. The HPC hydroxyl groups were first oxidized to ketone groups using 1-chlorobenzotriazol and then subjected to grafting with Jeffamines (diamines with polyether chains). All the syntheses were monitored by Fourier transform infrared spectroscopy (FT-IR). The HPC oxidation reaction was confirmed by the absorption signal of the carbonyl group at 1730 cm-1 and the grafted product by the C=N band at 1650 cm-1. SPE were obtained by the introduction of LiClO4 to these networks. The electrochemical impedance spectroscopy (EIS) was used to obtain the ionic conductivity values as a function of temperature and salt quantity. The best result of conductivity was 1.26·10-5 S/cm ([O]/[Li] = 6) at room temperature. All these results indicate that the resulting networks after lithium salt addition exhibit ionic conductivity and can be used as solid polymeric electrolytes.