ELECTROPHORETIC COATING OF SILICON-CARBON ON CARBON FIBERS AS ANODE IN STRUCTURAL BATTERIES FUNCTION-INTEGRATED TYPE

• Main Author: Erlangga M W, R
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/68691
• Institution: Institut Teknologi Bandung

The weight lithium-ion battery in the Tesla Model S reaches 25% of the total weight a car with graphite as an anode that has theoretical specific capacity only of 372 mAh/g. So, we have to fabricate a lightweight battery with high specific capacity anode to produce a car with more extended range. Function-integrated structural battery uses its constituent elements to store electrical energy and resisting mechanical loads resulting a lightweight battery. Carbon fiber is used as an anode because it has a high specific strength, specific modulus, and electrical conductivity. Silicon with theoretical specific capacity of 3579 mAh/g was coated on carbon fiber through an Electrophoretic Deposition (EPD) to increase specific capacity of the anode battery. SEM and EDX characterization proved that silicon was deposited on carbon fiber. The galvanostatic charge-discharge resulted in specific capacity of 454,57 mAh/g and capacity retention 85% for 50 cycles. Specific strength of 1,4337 MPa.m3/kg and specific modulus of 0,066 GPa.m3/kg resulted from tensile test. Carbon fiber-silicon structural battery produces highest specific strength and specific modulus compared to other studies. However, the specific capacity produced is still below carbon fiber - metal organic framework structural battery anode with a specific capacity of 648 mAh/g. Keywords: Battery structure, carbon fiber, EPD, silicon, specific capacity, specific modulus, specific strength