Lithium-ion battery (Li-ion) is a type of rechargeable battery (rechargeable battery) are widely applied in electronics. In the lithium ion battery is to move from the negative electrode to the positive electrode during use (discharging), and vice versa when charged (charging). Components of the lithium-ion battery consists of a cathode, anode, electrolyte and separator. Composing materials separator is a polymeric matrix, poreforming agent, filler, and a solvent.
Nanocomposite membrane PVdF/ZnO composite membrane is modified polyvinylidene fluoride (PVdF) by adding ZnO nanoparticles as a filler and a poly (vinylpyrrolidone) (PVP) as a pore forming agent in the membrane and the solvent N, N-Dimethylecetamide (DMAc). Manufacturing of separator membranes using phase inversion methods. Phase inversion method performed by dissolving ZnO nanoparticles in a solvent DMAc for 2 hours at 30°C and add PVdF and stirred for 1 hour at 45°C, then adding PVP to continue stirring for 2 hours at 45oC.
From the test morphology with Fourier Transmitter Infrared (FTIR) showed that the nanocomposite membrane of PVdF/ZnO with addition of ZnO nanoparticles composition showed that the membrane is formed in β-phase PVdF membranes because they are at the peak of wave number 510 cm-1 and 840 cm-1. Porosity test showed that the nanocomposite membrane PVdF / ZnO with a composition of ZnO
addition of 6% has a porosity value most, namely 79.29%. nanocomposite membrane of PVdF / ZnO with the addition of 6% composition has Electrolyte Uptake value (EU) most, namely 340%. Nanocomposite membrane PVdF/ZnO produce an average efficiency of 97.23% with a range of charge current range capacity 126.8 mAh / g -120.7 mAh / g and the discharge current range of 122.4 mAh / g - 117.9 mAh / g.