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Universiti pertahanan nasional malaysia
4
laporan tahunan 2014
4
89
8
P e n y e l i d i k a n
d a n I n o v a s i
Bil
Penyelidik
Anugerah
Tajuk Penyelidikan/ Projek
Ringkasan Produk
20
MG30 BIO-POLYMER
ELECTROLYTES FOR LITHIUM
BATTERIES
Our product based on non-aqueous gel polymer
electrolytes (GPEs) consisting of 30% poly(methyl
methacrylate)-grafted natural rubber (MG30),
lithium triflate (LiTf), and ethylene carbonate (EC)
dissolved in tetrahydrofuran have been proven
as promising electrolytes for lithium polymer
batteries. MG30 was obtained commercially from
the Rubber Research Institute of Malaysia (RRIM).
These polymer electrolytes were prepared using
the solution cast technique. The AC impedance
technique is employed at room and elevated
temperatures in order to optimize the conductivity
of MG30-LiTf samples. The membrane containing
35 wt.% of LiTf is found to exhibit the highest ionic
conductivity. The introduction of EC plasticizer
increased ionic conductivity up to 8.95 x 10-3 S
cm-1 at room temperature for the composition
MG30(15):LiTf(9):EC(76). The temperature
dependence conductivity studies showed that
these GPEs could enhance their performance at
elevated temperatures. The voltammogram of
GPE with an anodic decomposition limit of the
electrolyte was stable up to 4.2 V versus Li+/
Li, making it suitable for use in the fabrication of
lithium polymer cells using LiCoO2. The cycling
performance of the lithium polymer batteries
using Li anode with MG30:LiTf:EC (15:9:76 wt.%)
electrolyte and LiCoO2 cathode proved that
these green GPEs had a huge potential to be
commercialized and hence, could also be utilized
in portable defence & security devices.
Prof .Dr. Muhd Zu
Azhan Bin Yahya
BRONZE
(Sambungan) Jadual 40: Anugerah dan Pencapaian Penyelidik Pada MTE 2014