Nitrogen-doped　graphene　with　in-plane　porous　structure　was　fabricated　by　simple　co-pyrolysis　of　lignosulfonate　and　graphene　oxide　in　the　presence　of　urea.　Lignosulfonate　first　performs　as　a　dispersant　adsorbed　on　the　surface　of　graphene　oxide　to　prevent　the　aggregation　of　graphene　oxide　sheets　for　preparing　homogeneous　nitrogen-containing　precursor,　and　then　acts　as　a　porogen　to　render　graphene　sheets　with　nanopores　in　the　pyrolysis　process　of　the　nitrogen-containing　precursor.　Urea　was　used　as　a　nitrogen　source　to　incorporate　nitrogen　atoms　into　graphene　basal　plane.　The　special　nanoporous　structure　combined　with　nitrogen　content　of　7.41　at.%　endows　the　nitrogen-doped　graphene　electrode　material　with　super　capacitance　up　to　170　F　g(-1),　high　rate　performance,　and　excellent　cycling　stability.　(C)　2014　Elsevier　Ltd.　All　rights　reserved.