Reduced　graphene　oxide　(rGO)　is　a　type　of　significant　electrode　material　for　flexible　supercapacitor　due　to　its　outstanding　mechanical　and　electrochemical　properties.　However,　low　oxidative　activity　of　rGO　remains　a　constraint　in　developing　such　devices.　In　this　study,　partially　reduced　graphene　oxide　(prGO)　with　enhanced　oxidative　activity　was　prepared,　into　which　carbon　nanotubes　(CNTs)　were　incorporated　to　prepare　CNT/prGO　film　with　a　loosened　structure　by　filtration.　Then,　polyaniline　(PANi)　was　deposited　onto　the　surface　of　CNT/prGO　composite　through　in-situ　polymerization,　resulting　in　CNT/prGO/PANi　composite　film.　The　morphology　and　structure　were　investigated　via　SEM,　TEM,　XPS,　etc.　The　influences　of　CNT/prGO　ratio　and　aniline　polymerization　time　on　the　morphology　and　electrochemical　performance　were　studied.　The　electrochemical　test　results　indicated　that　the　CNT/prGO/PANi　composite　exhibited　the　best　electrochemical　performance　under　the　conditions　of　aniline　polymerization　for　4　h　and　CNT/prGO　ratio　of　3:10.　Further　increasing　the　polymerization　time　or　CNT/prGO　ratio　resulted　in　short　rods-like　PANi　coated　CNTs　which　merge　to　form　a　large　flake　morphology.　The　optimized　CNT/prGO/PANi　demonstrated　a　specific　capacitance　of　706　mF　cm−2　(∼353　F　g−1)　at　0.1　mA　cm−2,　with　the　specific　capacity　retaining　78　%　of　its　original　value　after　3000　charging/discharging　cycles　at　1　mA　cm−2.　Flexible　supercapacitors　fabricated　with　CNT/prGO/PANi　as　electrode　exhibited　an　energy　density　of　245　mW　h　cm−2　at　124　mW　cm−2.　These　results　suggest　that　flexible　solid-state　supercapacitors　based　on　CNT/prGO/PANi　hold　promising　potential　for　energy　storage　applications.　©　2025