Lithium-ion　battery　capacitor　(LIBC),　which　combines　battery　material　and　capacitor　material　in　the　cathode,　has　attracted　attention　for　bridging　the　gap　between　high　energy　density　and　high　power　density　in　energy　storage　devices,　but　its　application　is　hindered　by　polarization　phenomena.　To　address　this　problem,　an　enhanced　cathode　conductive　network　is　established　by　optimizing　the　conductive　agent　content　and　introducing　conductive　additives,　which　can　improve　the　electronic　and　ionic　conductivity.　Cathode　half-cell　with　enhanced　conductive　network,　utilizing　LiNi1/3Co1/3Mn1/3O2　and　activated　carbon　as　active　materials,　carbon　black　(CB)　and　vapor　grown　carbon　fiber　(VGCF)　as　conductive　agents,　indicates　excellent　capacity,　rate　capability,　and　cycle　performance.　And　it　shows　low　polarization　with　the　voltage　differences　between　the　redox　peaks　of　91　mV　at　0.1　mV　s−1　in　cyclic　voltammetry　experiments,　nearly　26　%　smaller　than　that　for　a　half-cell　with　only　5　%　CB　as　the　conductive　agent.　Additionally,　the　complex　polarization　dynamics　are　revealed　by　distribution　of　relaxation　times　technique　for　extracting　time　scale　information　and　a　mathematical　model　based　on　the　pseudo-two-dimensions　theory.　Consequently,　a　full-cell　with　a　pre-lithiated　soft　carbon　anode　is　assembled,　displaying　a　great　device　performance　of　300.3　Wh　kg−1　and　15.7　kW　kg−1.　After　7500　cycles　at　500　mA　g−1,　the　capacity　retention　of　the　device　can　reach　81.1　%　and　the　energy　efficiency　is　92.4　%.　This　study　contributes　to　a　better　understanding　of　the　polarization　phenomenon　of　LIBCs.　©　2025　Elsevier　Ltd