کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7962445 | 1513988 | 2018 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
3D carbon nanocage networks with multiscale pores for high-rate supercapacitors by flower-like template and in-situ coating
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
فناوری سوخت
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
3D hierarchical carbon nanocages, a novel carbon-based material, have demonstrated a strong momentum of high rate capability and power density supercapacitors. Herein we report the preparation of 3D carbon nanocage networks by nano coating carbon precursor on flower-like basic magnesium carbonate microspheres combining with in situ MgO template carbonization and KOH treatment. This material features with interconnected 3D network structure, crosslinked carbon nanocages (15-24Â nm in size and 2.5-3Â nm in shell thickness), high specific surface area (1470-1927Â m2Â g-1), multiscale pores (macro/meso/micropores) and uniform pore size distribution. Resulting from the multiple synergistic effects of these advantages, the 3D carbon nanocage networks present a remarkably excellent electrochemical performance with a large specific capacitance of 380Â FÂ g-1 at 1Â AÂ g-1 and high rate capability of 82% when increasing the current density up to 50Â AÂ g-1 in three-electrode configuration. For HPCNC-700-a symmetrical supercapacitor, the specific capacitance reaches up to 288Â FÂ g-1 at 1Â AÂ g-1 and still maintains at 256Â FÂ g-1 at 10Â AÂ g-1 with the capacitance retention of 89%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Storage Materials - Volume 13, July 2018, Pages 57-65
Journal: Energy Storage Materials - Volume 13, July 2018, Pages 57-65
نویسندگان
Jinqiu Shao, Mingyuan Song, Guang Wu, Yuhao Zhou, Jiafeng Wan, Xue Ren, Fangwei Ma,