کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6602654 | 1424079 | 2018 | 34 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
N/S co-doped three-dimensional graphene hydrogel for high performance supercapacitor
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Doping and high specific area are essential to the performance of supercapacitor electrode materials. However, the conventional single doping in two dimensional electrode materials is still unable to get high supercapacitive performance. Here we report a facile hydrothermal process using ammonia as a source of nitrogen (N) and thiourea as a sulfur (S) source to prepare N/S co-doped three dimensional (3D) graphene hydrogel (N/S-3DGH) for supercapacitor electrode application. The as-prepared N/S-3DGH is uniform and stable. The N/S co-doped 3DGH electrode material exhibits a high specific capacity of 1063 Cg-1 at a current density of 1 Ag-1. Even at a density of 20 Ag-1, it can still hold an excellent charge and discharge cycling stability, and with 76% of initial capacity retained after 6000 charge and discharge cycles at a density of 10 Ag-1. Moreover, the all-symmetric solid-state supercapacitor fabricated by N/S-3DGH without any binders owned an energy density of 6.25â¯Wh kgâ1 at a power density of 500â¯Wâ¯kgâ1 showing very promising applications for portable power and flexible energy storage devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 278, 10 July 2018, Pages 51-60
Journal: Electrochimica Acta - Volume 278, 10 July 2018, Pages 51-60
نویسندگان
Weijie Zhang, Zhongtao Chen, Xinli Guo, Kai Jin, YiXuan Wang, Long Li, Yao Zhang, Zengmei Wang, Litao Sun, Tong Zhang,