Vol 7, No 8 (2016) > Metalurgy and Material Engineering >

A Study of the Structural and Electrochemical Properties of Li3PO4-MMT-PVDF Composites for Solid Electrolytes

H. Jodi, Anne Zulfia, Deswita Deswita, E. Kartini


Abstract: Batteries on the market
today still use liquid-type electrolytes, which can result in safety issues
caused by electrolyte leakage. Therefore, studies that search for solid-state
electrolytes are important for resolving these issues. In this research, a
composite of lithium phosphate-montmorillonite-polyvinylidene fluoride (Li3PO4-MMT-PVDF)
has been characterized with the aim of detecting the electrochemical
performance of Li3PO4 with the addition of MMT. Li3PO4
samples were prepared through a solid-state reaction, which was then mixed with MMT, which had
a composition ranging from 5 wt% to 20 wt%, and 1 wt% PVDF as a binder. This
characterization was conducted with structural, morphological, and
electrochemical aspects. The structural test showed that the X-ray diffraction (XRD) pattern was dominated by Li3PO4 peaks and MMT aluminosilicates. The electrochemical characterization indicated
that the conductivity value of the composites was greater than that of Li3PO4.
The highest conductivity was achieved with a 15 wt% MMT addition, with a
dielectric-constant value of 74.9 at a frequency of 10 kHz.
Keywords: Composites; Electrochemical Impedance Spectroscopy; Lithium Phosphate; Montmorillonite; Solid Electrolyte

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