LaMnO3　is　a　promising　candidate　for　used　in　supercapacitor　because　of　its　unique　anion-based　intercalation　capacitive　behavior.　Its　electrochemical　performance,　however,　is　still　seriously　limited　by　the　intrinsically　poor　electrical　conductivity　and　the　exudation　of　Mn　species　during　reversible　intercalation.　Herein,　we　demonstrate　that　the　hybridization　of　LaMnO3　with　NiCo2O4　to　form　hierarchical　core–shell　nanosheet-assembled　architectures　on　Ni　foam　can　efficiently　suppress　the　leaching　of　Mn　species　and　evidently　improve　the　electronic　conductivity,　thus　optimizing　its　physicochemical　properties　for　supercapacitance.　As　expected,　superior　capacitive　performance　is　achieved　with　ultrahigh　specific　capacity　of　811　C　g−1　at　0.5　A　g−1,　and　the　capacity　still　reached　555　C　g−1　even　at　the　largest　current　density　of　16　A　g−1　with　a　high　rate　capability　of　68%.　When　assembled　with　activated　carbon　(AC)　as　an　hybrid　supercapacitor　device,　it　delivers　not　only　maximum　energy　density　of　36.6　Wh·kg−1　at　a　power　density　of　800　W　kg−1　and　ultrahigh　power　density　of　25,600　W　kg−1　at　an　energy　density　of　19.4　Wh·kg−1,　but　also　robust　cycling　stability　(up　to　10,000　cycles),　holding　great　potential　for　future　energy　storage　devices.　©　2019　Elsevier　Ltd