Sodium ion conducting NaI-Na3PO4 solid electrolyte with PLLTMEDA as an additive for solid state batteries Online publication date: Fri, 24-Feb-2017
by A.H. Ahmad; N. Hassan
International Journal of Nanotechnology (IJNT), Vol. 14, No. 1/2/3/4/5/6, 2017
Abstract: In this work poly(L-leucine)1,3-diamino propane (PLLTMEDA) has been chosen as an additive to the binary compound sodium iodide (NaI) and sodium phosphate (Na3PO4). A small amount of PLLTMEDA was added to the optimum composition of the binary compound (0.5 NaI-0.5 Na3PO4). Results from EIS have proven this new compound is superionic with maximum conductivity of 1.12 × 10−3 S cm−1. Fourier transform infrared spectroscopy (FTIR) analysis revealed the band of C=O at 1650 cm−1 experienced a shift, indicating that some interaction had occurred. The ionic transference number was found to be ≈1 for the optimum composition with maximum conductivity which suggests that the sample is ionic in nature. The optimum composition of the sample was used as solid electrolyte in solid state sodium battery. The sodium battery was tested by the discharged characteristic at a current of ≈1.0 µA. The solid state sodium batteries exhibited a discharge capacity of 173 mAh/g.
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