The　existing　recycling　and　regeneration　technologies　have　problems,　such　as　poor　regeneration　effect　and　low　added　value　of　products　for　lithium　(Li)-ion　battery　cathode　materials　with　a　low　state　of　health.　In　this　work,　a　targeted　Li　replenishment　repair　technology　is　proposed　to　improve　the　discharge-specific　capacity　and　cycling　stability　of　the　repaired　LiCoO2　cathode　materials.　Compared　with　the　spent　cathode　material　with　＞50％　Li　deficiency,　the　Li/Co　molar　ratio　of　the　regenerated　LiCoO2　cathode　is　＞0.9,　which　completely　removes　the　Co3O4　impurity　phase　formed　by　the　decomposition　of　LixCoO2　in　the　failed　cathode　material　after　repair.　The　repaired　LiCoO2　cathode　mater-ials　exhibit　better　cycling　stability,　lower　electrochemical　impedance,　and　faster　Li+　diffusion　than　the　commercial　materials　at　both　1　and　10　C.　Meanwhile,　Li1.05CoO2　cathodes　have　higher　Li　replenishment　efficiency　and　cycling　stability.　The　energy　consumption　and　greenhouse　gas　emissions　of　LiCoO2　cathodes　produced　by　this　repair　method　are　significantly　reduced　compared　to　those　using　pyrometallurgical　and　hydro-metallurgical　recycling　processes.