MEMBRANES FROM POLYBLENDS OF PVA – PEG – LICLO4 FOR LITHIUM ION BATTERY APPLICATION

• Main Author: TRAYASRINDRA (NIM : 10508064); Pembimbing : Prof. Dr. I Made Arcana, DANANG
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/15253
• Institution: Institut Teknologi Bandung

The need for the efficient and safe storage battery as an electrical energy resource today is increasing due to most of the electronic equipments such as hand phone and notebook use the battery as the electrical energy resource. One of the electrical energy storage battery is a lithium-ion battery, currently configured with a liquid electrolyte between the anode (lithium metal) and cathode (lithium metal oxide). The use of a liquid electrolyte leads to problems such as leakage of a flammable electrolyte, production of gases upon overcharge, as well as a thermal runway reaction when it is heated to high temperatures. One attempt to resolve this problem is to replace the liquid electrolyte with a solid electrolyte by using the polymer <br /> <br /> <br /> <br /> <br /> electrolyte. Therefore, in this study was focused on the preparation of environmentally friendly polyelectrolyte membrane with low cost for lithium-ion battery applications. The preparation of polyelectrolyte membrane was done by casting of polymer solution with using polyblends of PVA (polyvinyl alcohol), PEG (polyethylene glycol), and LiClO4 used as an ionic salt. Polyelectrolyte membrane properties were characterized by analysis of functional groups with FTIR (Fourier transformer infrared), conductivity with EIS (electrochemical impedance spectroscopy), thermal resistance with TGA / DTA (thermal gravimetric analysis / differential thermal analysis), crystallinity with XRD (X-ray diffraction), and analysis of mechanical properties with tensile tester. The maximum conductivity with value of 3.22 x10-6 S/cm) was observed in polyelectrolyte membrane with ratio PVA : PEG (80%: 20%) and the addition of LiClO4 as the ionic electrolyte (15 % of total weight 1 gram) can increase the conductivity of membrane to 1.91 x10-4 S/cm. In the testing of membrane performance with using a commercial battery cell, polyelectrolyte membrane of PVA/PEG/Li was observed to have the initial voltage value of 3.95 Volt, it is higher than the value of the commercial membrane with the initial voltage of 3.84 Volt. In the discharging, the average decline rate of the voltage value for polyelectrolyte membrane of PVA/PEG/Li was 0.02 Volt/min with discharge time 65 minutes. However, in the charging the maximum voltage value and the average rate of charging were 3.74 Volt and 0.00373 Volt/min, respectively, with the charging time for 55 minutes, which were higher than the value of the commercial membrane. The polyelectrolyte membrane prepared by blending of PVA : PEG (80%: 20%) with the addition of LiClO4 15% could be applied as alternative <br /> <br /> <br /> <br /> <br /> polyelectrolyte membranes for lithium-ion battery applications.