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Optimizing Cathode Structure for Enhanced Electrochemical Performance Using 3D-printed Lattice Structures

Project Description:

This project aims to improve the performance of solid-state batteries by redesigning the cathode structure using 3D printing. Traditional cathodes limit ion and electron transport due to disorganized internal pathways. To address this, we use 3D-printed polymer lattice molds made from polycarbonate-carbon fiber (PC-CF) to guide the structure of lithium iron phosphate (LFP) cathodes. The PC-CF decomposes during sintering, leaving behind organized channels that enhance conductivity. We optimized printing parameters using the Prusa i3 Mk3S+ and tested materials using optical microscopy, DSC/TGA, and Raman spectroscopy. This method allows precise control over porosity and tortuosity to improve battery efficiency, durability, and safety.

Project Photo:

A 3D-printed lattice structure shown above a schematic of a composite cathode. The schematic illustrates how the printed lattice forms vertical and horizontal channels that improve ion and electron transport from the current collector through the cathode.

3D-printed lattice molds create structured channels within the cathode, improving ion and electron transport. This design reduces tortuosity and enhances conductivity, leading to better battery performance.

Student Team Members

  • Robbin Bai

Course Faculty

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