Abstract:
Recently, energy storage devices are soaring demand in transportation, mobile
electronic strategies and other applications in renewable energy. Battery is used to give
power to the system and stored the electrical energy in the form of chemical energy.
Since the electrolyte is the key component in batteries, it affects the electro-chemical
performance and safety of the batteries. In lithium batteries, the solid electrolyte is
selected based on the best performance in a wide variety of operating temperature, cell
capacity, cyclic ability of the batteries and safety. In this study, the electrical
conductivity can be obtained by modifying the structure of the insulating polymer chain
by doping of metallic ions. Polyvinylpyrrolidone (PVP) based solid polymer
electrolytes were fabricated and characterized. Conductivity of the electrolyte has been
enhanced by incorporating suitable number of Li-ions. 0.5 g of polyvinylpyrrolidone
(PVP) was dissolved in 1 ml of methanol and the solution was continuously stirred
using magnetic stirrer for 12 hours to get a homogeneous gel polymer electrolyte. In
order to enhance the conductivity of the gel polymer electrolyte, different amount
(weight percentages of the polymer) of LiCl was added to the polymer solution and
solution was continuously stirred for 12 hours to get a homogeneous gel electrolyte. To
get the solid polymer electrolyte film, all gel electrolytes were allowed to dry on glass
plate. Semi-transparent solid films were obtained. PVP + 15% lithium-ion combination
shows a high conductivity in gel electrolyte and solid polymer electrolyte which are
0.0046 Scm-1 and 1.90045×10-5 Scm-1 respectively. Fabricated PVP/lithium-ion
electrolyte can be used in rechargeable batteries.
