Oxidation-CO2 leaching of spent LiFePO4 for lithium extraction and impurities control

Oxidation-CO2 leaching of spent LiFePO4 for lithium extraction and impurities control | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Oxidation-CO 2 leaching of spent LiFePO 4 for lithium extraction and impurities control Zhiming Yan, You WU, Zepeng Lv, Shiying Qin, Mingrui Yang, Anwar Sattar, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6012166/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Lithium iron phosphate (LiFePO₄ or LFP) is a critical cathode material in electric vehicle batteries, although its recycling is constrained by limited economic feasibility. This study proposes an innovative H₂O₂-CO₂ leaching strategy for the selective extraction of lithium from spent LFP batteries. This approach operates at ambient temperature and pressure, delivering a straightforward process with high leaching efficiency. Optimal conditions yield a lithium leaching efficiency greater than 95%, with kinetic analysis indicating that the process is primarily controlled by solid layer diffusion. For impurity control, iron and phosphorus are removed by high-temperature treatment, and copper is effectively removed using an electrochemical method, resulting in a high purity of more than99.6% of the Li₂CO₃ product. Life cycle assessment highlights the substantial reductions in energy consumption and greenhouse gas emissions, alongside notable economic advantages of this process. This approach is a promising, sustainable, and economically advantageous solution for recycling spent LFP batteriesand has substantial application potential. Materials Engineering Chemical Engineering Spent LiFePO4 battery Lithium selective extraction Oxidation-CO2 leaching Impurities control Life cycle assessment. Full Text Additional Declarations The authors declare no competing interests. Supplementary Files SupplementaryMaterials.docx SUPPLEMENTARY MATERIALS Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. 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