Porous carbonaceous materials are promising candidate to meet the requirement for green energy storage because they have been widely applied for batteries and electrochemical capacitors (ECs). However, the specific capacitance of carbon-based ECs usually can't over 200 F/g which restrict their application for high energy required electronics. Here, we report the synthesis of N-doped carbon interconnect nanosheets through directly carbonizing Rhodamine 6G derivant (R6GK). This carbonaceous material owns a high capacitance of 299 F/g as well as excellent cycling stability. The symmetric device assembled with this carbon sheets could deliver an energy density over 10 Wh/kg, suggesting its high potential for practical application. (C) 2016 Elsevier Ltd. All rights reserved.