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Solid-State Lithium Ion Batteries are the future of lithium ion energy storage technology, showing increased theoretical capacity and safety compared to their liquid electrolyte counterparts. However, poor mechanical contact and high resistance at the electrode-electrolyte junction prevent their wider adaptation. Direct Ink Writing (DIW) is an effective tool for electrode printing due to its ability to quickly and uniformly fabricate high surface area patterns and complex microstructures, increasing interfacial contact with a polymer electrolyte and boosting performance. This project will focus on creating, testing, and optimizing cathodes designed for Solid-State Lithium Ion batteries consisting of LFP (LiFePO4) based ink directly printed onto an aluminum current collector. The project goal is to optimize the rheology of the ink, particle loading, and patterning which will result in cathodes with improved electrochemical performance while maintaining mechanical durability in a quick and reliable manner. As such, various three-dimensional microlattice patterns and particle loadings will be tested to determine which combination results in the best cathode. DIW of electrodes for solid-state batteries may hold the key for the development and manufacture of the next generation of energy storage devices, greatly impacting our ability to utilize and further adopt renewable energy sources.