کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7724695 | 1497832 | 2018 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrochemical supercapacitor performance of boron and nitrogen co-doped porous carbon nanowires
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Boron and nitrogen co-doped carbon (BNDC) nanowires supporting on carbon paper substrate are designed as binder-free electrode material for supercapacitor application. Boric acid-polyaniline is synthesized via electro-polymerization route using polyvinyl pyrrolidone as a structure-directing agent, showing the close-packing nanowire structure. BNDC is then formed by simultaneously doping boron and nitrogen during carbonization process of boric acid-polyaniline, showing nanowire-interconnected network structure. BNDC exhibits high specific capacitance of 504.0â¯Fâ¯g-1â¯at 1.0â¯Aâ¯gâ1 in 1.0â¯Mâ¯H2SO4 electrolyte. The superior capacity performance results from the porous structure with high surface area of 1022.4â¯m2â¯gâ1 and the pseudocapacitance of boron, nitrogen and oxygen-containing functional groups. BNDC shows the cycling capacitance retention of 97.4% after 10000 cycles at 10.0â¯Aâ¯gâ1, presenting good cycling stability. A symmetrical solid-state BNDC supercapacitor is constructed using BNDC electrode and polyvinyl alcohol-H2SO4 gel electrolyte. This device reveals specific capacitance of 255.7â¯Fâ¯g-1â¯at 1.0â¯Aâ¯gâ1, energy density of 22.7â¯Wâ¯hâ¯kgâ1 at power density of 0.2â¯kWâ¯kgâ1, the capacity retention of 91.0% after 5000 cycles at 5.0â¯Aâ¯gâ1 and an output voltage of 1.6â¯V. BNDC supercapacitor with comparable capacitance performance presents the promising application in electrochemical energy storage devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 400, 1 October 2018, Pages 264-276
Journal: Journal of Power Sources - Volume 400, 1 October 2018, Pages 264-276
نویسندگان
Zhichao Zhao, Yibing Xie,