کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1557149 1513742 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Continuously hierarchical nanoporous graphene film for flexible solid-state supercapacitors with excellent performance
ترجمه فارسی عنوان
فیلم گرافن نانومواد سلسله مراتبی برای ابررایانه های حالت جامد حالت جامد با عملکرد عالی
کلمات کلیدی
گرافن نانوذرات سلسله مراتبی، گرافیت هیدروژنه ابر مخزن جامد حالت، مس نانوپور، رسوبات بخار شیمیایی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی
Continuously hierarchical nanoporous graphene (hnp-G) films are synthesized by a combination of low-temperature CVD growth of hydrogenated graphite (HG) coating on nanoporous copper (NPC) and rapid catalytic pyrolysis of HG at high temperature. Low-temperature growth of HG coating on NPC can obviously delay the coarsening evolution of NPC at high temperature, providing the precondition to obtain hnp-G with small pore size (1-150 nm) by catalytic pyrolysis at high temperature. The high specific surface area (1160 m2/g) of hnp-G are mainly originated from the external surface (954.7 m2/g), resulting in fully accessible channels for ion transport. More importantly, the continuously 3D hierarchical nanoporous structure and fully wettability of the hnp-G with gelled electrolyte not only effectively prevent the restacking of graphene even under dramatic squeezing but also guarantee the continuous and short electron/ion diffusion pathway in the whole electrodes, resulting in ultrahigh specific capacitance (38.2 F/cm3 based on the device) and excellent rate performance. The symmetric SC offers ultrahigh energy density (2.65 mW h/cm3) and power density (20.8 W/cm3) and exhibits almost identical performance at various curvatures and excellent lifetime (94% retention after 10,000 cycles), suggesting its wide application potential in powering wearable/miniaturized electronics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nano Energy - Volume 24, June 2016, Pages 158-164
نویسندگان
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