Structure and Properties of an Organic Rectorite/ Poly(methyl methacrylate) Nanocomposite Gel Polymer Electrolyte byIn SituSynthesis
writer：Huang Y, Ma XY*, Liang GZ，and Yan HX
keywords：nanocomposite gel polymer electrolyte; ionic conductivity; thermal stability; lithium ion batteries
source：期刊
specific source：Clay Minerals, 44(1), pp35, 2009
Issue time：2009年
The synthesis of organic-modified rectorite
(OREC)/polymethyl methacrylate (PMMA) nanocomposite gel polymer electrolyte
(NGPE) viain situ polymerization was investigated using free radical initiator
in an solution, in which organic plasticizer, propylene carbonate(PC) acted as
a solvent. A serious of NGPE membranes with different OREC content were
prepared and characterized.The dispersion and exfoliation statuses of the OREC
in the prepared NGPE membranes were analyzed through X-ray diffraction (XRD)
and transmission electron microscope (TEM), and the results indicated that for
the NGPE with 5 wt % OREC membrane, OREC was partly exfoliated and well
dispersed in the gel polymer electrolyte system. The electrochemical properties
of the NGPE were determined by alternating current (AC) impedance spectroscopy,
which illustrated that the ionic conductivity of the nanocomposite gel polymer
electrolyte firstly increased and then decreased with increasing OREC content.
Meanwhile, the maximum value of ionic conductivity for nanocomposite gel
polymer electrolytes was obtained when organic clay amount was 5 wt %. The
interactions among the components of the NGPE were investigated by Fourier transform
infrared (FTIR) spectroscopy. It was shown that there were specific
interactions between OREC and the other components, which may influence the
conductivity and the stability of GPEs. Finally, an thermal stability enhancement
was presented by NGPE with 5 wt % OREC compared with GPE, which was determined
by differential scanning calorimetry (DSC) and thermogravimetric analysis
(TGA).