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.　©　2017