MECHANICAL AND ELECTRICAL CHARACTERISTICS OF LATP SOLID ELECTROLYTE DUE TO COMPRESSIVE LOADING : FINITE ELEMENT ANALYSIS

• Main Author: Muzaki, Fahmi
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/65510
• Institution: Institut Teknologi Bandung

Solid State Battery (SSB) has good potential as future energy storage because it has a higher energy density and power. Replacing fluids with solid electrolytes can provide a solution to safety problems because solid electrolytes have good mechanical strength. Although SSB has promising potential, SSB has several new issues in its current development. Cracks that appear during the charge-discharge process on the SSB can affect battery performance. During the charge-discharge process in SSB, there is a change in volume at the anode and cathode due to the displacement of lithium ions. The continuous volume changes of the anode and cathode during lithiation/delithiation cause high compressive loading cycles during SSB operation. High cycles under compressive loading can cause cracks in solid electrolytes. Crack propagation that occurs will affect the conductivity of solid electrolyte ions. This study aims to determine and analyze the effect of compressive loading that causes cracking of solid electrolytes on ion conductivity. The electrolyte used in this study was Li1.3Al0.3Ti1.7(PO4)3 (LATP). This research was carried out by simulating cracks in the solid LATP electrolyte by applying a compressive load. The magnitude of the compressive loading was evaluated and analyzed for its effect on the solid electrolyte cracking of LATP. To simulate the cracking that occurs in the solid LATP electrolyte, a Cohesive Zone Element is applied to the grain boundaries of the LATP solid electrolyte. The effect of compressive loading is analyzed by evaluating the changes in ionic conductivity that occur.