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Therefore, nitrogen-doped porous carbons (NPCs) were prepared through a facile carbonization\/activation strategy by treating different mass ratios of melamine\u2013urea\u2013formaldehyde resin and KOH. It is clearly demonstrated that because of the introduction of KOH, the resulting NPCs were shown to have increased specific surface area and a rich pore structure, and the best sample possessed a large specific surface area of 2248 m2 g\u20131 and high N content, which contributed to the good electrochemical performance for supercapacitors. Accordingly, a three-electrode system assembles NPCs as an electrode using aqueous KOH solution; the specific capacitance was 341 F g\u20131 under the current density of 1 A g\u20131 and retained a specific capacitance of almost 92% after 5000 cycles. The maximum energy output for a symmetrical solid-state supercapacitor with NPCs as the electrode material was 9.60 W h kg\u20131 at 1 A g\u20131. NPCs have promising applications on high-performance supercapacitors and other energy-storage devices.<\/jats:p>","DOI":"10.1021\/acsomega.9b01916","type":"journal-article","created":{"date-parts":[[2019,9,19]],"date-time":"2019-09-19T10:01:35Z","timestamp":1568887295000},"page":"15904-15911","source":"Crossref","is-referenced-by-count":240,"title":["High Specific Capacitance Electrode\nMaterial for Supercapacitors Based on Resin-Derived Nitrogen-Doped\nPorous Carbons"],"prefix":"10.1021","volume":"4","author":[{"given":"Jing","family":"Yu","sequence":"first","affiliation":[{"name":"Tongji University , , ,","place":["Shanghai, P. R. China, 201804"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ning","family":"Fu","sequence":"additional","affiliation":[{"name":"Tongji University , , ,","place":["Shanghai, P. R. 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