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The emerging regeneration\/upcycling approach for S\u2010LCO mainly adopts solid\u2010state treatment, showing significant potential of short\u2010range, high\u2010efficient reactivation of S\u2010LCO materials. Yet it suffers from the complex pre\u2010determination of lithium content as well as the varying degradation degrees of S\u2010LCO materials from different batches of retired LIBs. Meanwhile, the cost\u2010effective ternary layered oxides have become the mainstream cathode materials for LIBs due to the rapid popularization of electric vehicles. Herein, we use a LiOH\u2010LiNO\n                    <jats:sub>3<\/jats:sub>\n                    eutectic molten salt as the reaction medium to upcycle S\u2010LCO for single\u2010crystalline LiNi\n                    <jats:sub>1\/3<\/jats:sub>\n                    Co\n                    <jats:sub>1\/3<\/jats:sub>\n                    Mn\n                    <jats:sub>1\/3<\/jats:sub>\n                    O\n                    <jats:sub>2<\/jats:sub>\n                    (NCM111) cathode materials. The molten salt treatment not only achieves self\u2010saturating relithiation and direct transformation of S\u2010LCO toward stoichiometric NCM111 materials but also rejuvenates the product with structural and compositional integrity for outstanding electrochemical performance. The product delivers a specific capacity of 161.6 mAh g\n                    <jats:sup>\u22121<\/jats:sup>\n                    at 0.1 C and a 92.4% capacity retention after 200 cycles at 1 C, outperforming those of commercial NCM111 materials. This study provides a simple, green, and scalable approach for handling those S\u2010LCO materials, suggesting a sustainable and transformative solution for recycling retired LIBs.\n                  <\/jats:p>","DOI":"10.1002\/smtd.70899","type":"journal-article","created":{"date-parts":[[2026,7,29]],"date-time":"2026-07-29T06:55:23Z","timestamp":1785308123000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Sustainable Upcycling of Spent LiCoO\n                    <sub>2<\/sub>\n                    Toward High\u2010Stability NCM Cathode via Eutectic Molten Salt Synthesis"],"prefix":"10.1002","volume":"10","author":[{"given":"Mengdan","family":"Jiang","sequence":"first","affiliation":[{"name":"School of Physics and Materials Science Jiangxi Provincial Key Laboratory of Photodetectors Jiangxi Engineering Laboratory For Advanced Functional Thin Films Nanchang University  Nanchang Jiangxi 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