The　use　and　scrap　of　lithium　ion　batteries,　especially　power　lithium　ion　batteries　in　China,　are　increasing　every　year.　Regeneration　of　spent　battery　materials　is　not　only　important　for　environmental　protection　and　resource　saving,　but　also　for　the　production　of　high　value-added　materials.　In　this　research,　spent　power　lithium-ion　battery　cathode　material　LiNi1-xCoxO2　was　acid-leached　and　a　polymetallic　leaching　solution　containing　Li,　Ni,　Co,　Al　and　Cu　was　obtained.　Cu　was　extracted　from　the　leachate　by　using　CP-150　(2-hydroxy-5-nonyl　salicylaldehyde　oxime).　The　optimal　conditions　were　found　to　be　organic:　aqueous　phase　ratio　(O/A)　=　2:1,　extraction　agent　concentration　of　30%,　and　pH　=　3.　The　precursor　was　prepared　by　coprecipitation　of　the　leachate　after　Cu　removal.　Then,　cathode　material　of　lithium　nickel　cobalt　aluminate　LiNi0.8Co0.15Al0.05O2　was　synthesized　under　the　optimal　conditions　of　n　(precursor):　n　(lithium　carbonate)　=　1:1.1,　calcination　temperature　of　800　degrees　C　for　15　h.　The　regenerated　LiNi0.8Co0.15Al0.05O2　product　prepared　under　the　optimized　conditions　was　in　a　pure　phase　with　a　layered　structure　and　a　smooth　surface　morphology.　The　first　charge　specific　capacity　was　248.7　mAh/g,　and　the　discharge　specific　capacity　was　162　mAh/g.　The　interfacial　impedance　was　119　Omega.　The　50th-cycle　discharge　specific　capacity　was　149.1　mAh/g,　and　the　capacity　retention　rate　was　high　as　92%.　Therefore,　the　regenerated　cathode　material　exhibited　good　performance.　(C)　2019　Elsevier　Ltd.　All　rights　reserved.