Graphite is a key element used in clean energy technologies, such as lithium-ion batteries and solar panels, but as of now it is completely imported into the United States, predominantly from China. Though the United States has insufficient deposits of natural graphite to meet the growing demand for its use, synthetic graphite could serve as a more sustainable source of production. One challenge is that synthetic graphite production currently relies on fossil fuel-based feedstocks, but recent advancements in production using waste biomass or plastics waste have made "green" synthetic graphite a more appealing and plausible option for building domestic supply capacity. Leveraging a combination of multiple modeling strategies, this proposal aims to evaluate the environmental, economic, and equity implications of a developing green graphite supply chain in the US. The proposed work will compare two main potential feedstocks for synthetic graphite: biochar, a carbon-rich material typically derived from partially combusted biomass, like agricultural residues or industrial paper sludge, and plastics waste. The team will use information gleaned from literature review, geospatial analysis, and material flow analysis (MFA) to characterize the current domestic availability and flows of these source materials. They will then use life cycle assessment (LCA) and technoeconomic assessment (TEA) to evaluate the environmental and economic impacts of green graphite production processes that use these feedstocks. Finally, they will undertake regulatory analysis that will help provide policy recommendations for facilitating sustainable and equitable development of these supply chains. Sloan funds will primarily go towards faculty and student support, including support for one postdoctoral fellow and one graduate student researcher to contribute to the effort. The team will use additional funds from Yale University to hire additional graduate student researchers. Outputs are expected to include academic journal articles, conference presentations, and a project website to share key findings and resources. To broadly disseminate their findings, the team will also host a series of public webinars and a research symposium to help share results with a diverse range of stakeholders.