Nitrogen-doped　graphene/carbon　nanohorns　composite　(NGLC)　was　prepared　by　one-step　co-pyrolysis　of　graphene　oxide,　carbon　nanohorns　(CNHs),　urea,　and　lignosulfonate.　CNHs　as　spacers　were　inserted　into　graphene　nanosheets.　The　introduction　of　CNHs　and　the　loosened　nano-structure　of　NGLC　make　it　achieve　a　high　specific　capacitance　of　363　F　g(-1)　at　a　discharge　current　density　of　1　A　g(-1),　and　NGLC　exhibits　an　ultrahigh　stability　of　93.5%　capacitance　retention　ratio　after　5000　cycles.　The　outstanding　comprehensive　electrochemical　performance　of　NGLC　could　meet　the　need　of　the　future　acted　as　an　efficient　supercapacitor　electrode　material.　(C)　2017　Published　by　Elsevier　Ltd　on　behalf　of　The　editorial　office　of　Journal　of　Materials　Science　&　Technology.