کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1564638 1513998 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nitrogen-doped hierarchical porous carbon derived from block copolymer for supercapacitor
ترجمه فارسی عنوان
کربن متخلخل سلسله مراتبی نیتروژنی که از کوپلیمرهای بلوک برای مخزن سوپراکر استفاده شده است
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی فناوری سوخت
چکیده انگلیسی
Nitrogen-doped hierarchical porous carbon was successfully synthesized using block copolymers as precursor by a self-template method and subsequent KOH chemical activation. The self-template agent, polystyrene, promotes the formation of mesopores, which is favorable for the rapid transport of both electrons and electrolyte ions. The micropores of nitrogen-doped hierarchical carbons were then extensively developed by activation to provide large electrochemical double-layer capacitance. As the activation temperature increased from 600 °C to 900 °C, the specific surface area of the materials increased dramatically. Thus, the as-obtained nitrogen-doped hierarchical carbon (NHPC-800) possesses a high surface area of up to 2104.5 m2/g with nitrogen content of 5.79%. It exhibits a maximum specific capacitance of 257 F/g at a current density of 0.5 A/g in 6 M KOH aqueous electrolyte as measured in a three-electrode system. Furthermore, the nitrogen-doped hierarchical carbon electrode exhibits excellent rate capability with 128 F/g remaining at 20 A/g and good cycling stability of 90.38% retention over 10,000 cycles in a two-electrode system. The tunable porous structure and effective nitrogen doping via block polymer precursor shed a light for designing advanced electrode materials for a high-performance electrochemical energy system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Storage Materials - Volume 3, April 2016, Pages 140-148
نویسندگان
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