To　further　meet　the　application　needs　of　lithium-ion　batteries,　developing　cathodes　with　higher　voltage　and　higher　operating　temperatures　has　become　a　primary　goal.　However,　LiCoO2　cathodes　encounter　structural　issues,　particle　fracture,　and　side　reactions　during　high-voltage　and　high-temperature　cycling.　Thus,　this　work　designs　a　novel　interface　engineering　approach　involving　near-surface　Li　layer　regulation　and　enhances　the　stability　of　the　R3m　layered　structure,　suppressing　intergranular　cracking.　An　undistorted　surface　with　reduced　phase　transitions　was　revealed　by　the　HAADF-STEM.　The　interface　regulation　by　post-cycle　simulations　and　XRD　stabilizes　interplanar　spacing.　The　strong　B-O　bonds　lower　the　O　2p　energies,　preventing　oxygen　loss　and　side　reactions　confirmed　by　XPS　and　band　structure.　Therefore,　even　under　50　degrees　C,　the　half-cell　maintains　a　capacity　retention　rate　of　79%　after　200　cycles　at　5C　at　4.5　V.