SYNTHESIS OF COMPOSITE POLYMER UIO-66 MOFS/PEO/PVA FOR LITHIUM-ION BATTERY MEMBRANE APPLICATIONS

• Main Author: Husein, Aditya
• Format: Final Project
• Language: Indonesia
• Subjects: Kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/52134
• Institution: Institut Teknologi Bandung

Lithium ion batteries have a crucial role in energy storage technology to fulfill energy needs such as electronic devices, electric vehicles, and industries. However, currently lithium ion batteries have several disadvantage, such as the migration of lithium ions relatively low in the solid electrolyte membrane, due to the high crystallinity of the polymer blocking the migration of lithium ions. Therefore, MOFs (Metal-Organic Frameworks) are porous materials so it can form ionic channel as an alternative to increase the migration of lithium ions. In this research, MOFs were synthesized, which were composited subsequently with polymer as a polymer electrolyte membranes for lithium ion batteries. MOFs UiO-66 (Universitetet i Oslo) was synthesized by solvothermal method at 120 °C for 24 hours. Composite polymer membranes were made by mixing UiO-66 with Poly(ethylene oxide) and Poly(vinyl alcohol) used the solution casting method. The addition of UiO-66 variations of 0%, 2%, 4%, 6%, and 8% (w/w), together with addition of 9% (w/w) LiPF6 salt. Diffractrogam of the synthesized UiO-66 showed the same peaks with the literature, while the PXRD characterization of the MOFs UiO- 66/PEO/PVA showed that a broaden diffraction peak and the polymer structure formed was amorphous. FTIR spectra of the synthesized UiO-66, showed that there was a shift in the absorption peak of carbonyl group from 1714 to 1661 cm-1 and the appearance of the Zr-O absorption peak at 665 cm-1. FTIR spectra of MOFs UiO-66/PEO/PVA, showed an absorption peak at 1077 cm-1, which indicates that there are alkoxy groups that accumulated from PEO and PVA. Tensile strength test showed that the addition of MOFs UiO-66 decreased the tensile strength of the polymer composite membrane by an average of 14% for every 2% of UiO-66 addition. The ionic conductivity test using the electrochemical impedance spectroscopy (EIS) method for the addition of MOFs UiO-66 with variations of 0%, 2%, 4%, 6%, and 8%, respectively were 1.15x10-3 S/cm; 1.32x10-3 S cm-1; 2.25x10-3 S cm-1; 4.97x10-3 S cm-1; 8.25x10-3 S cm-1. The addition of MOFs to the polymer was effective in increasing the ion conductivity by 7 times compared to without the addition of UiO-66.