In　this　study,　LiNi0.8Co0.15Al0.05O2@x%Al(2)O(3-)coated　cathode　materials　were　regeneratively　compounded　by　the　solid-phase　sintering　method,　and　their　structural　characterization　and　electrochemical　performance　were　systematically　analyzed.　The　regenerated　ternary　cathode　material　precursor　synthesized　by　the　co-precipitation　method　was　roasted　with　lithium　carbonate　at　a　molar　ratio　of　1:1.1,　and　then　completely　mixed　with　different　contents　of　aluminum　hydroxide.　The　combined　materials　were　then　sintered　at　800　&　DEG;C　for　15　h　to　obtain　the　regenerated　coated　cathode　material,　LiNi0.8Co0.15Al0.05O2@x%Al2O3.　The　thermogravimetry　analysis,　phase　composition,　morphological　characteristics,　and　other　tests　show　that　when　the　added　content　of　aluminum　hydroxide　is　3%,　the　regenerated　cathode　material,　LiNi0.8Co0.15Al0.05O2@1.5%Al2O3,　exhibits　the　highest-order　layered　structure　with　Al2O3　coating.　This　material　can　better　inhibit　the　production　of　Ni2+,　and　improve　material　structure　and　electrochemical　properties.　The　first　charge-discharge　efficiency　of　the　battery　assembled　with　this　regenerated　cathode　material　is　97.4%,　a　50-cycle　capacity　retention　is　93.4%,　and　a　100-cycle　capacity　retention　is　87.6%.　The　first　charge-discharge　efficiency　is　far　better　than　that　of　the　uncoated　regenerated　battery.