کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5460597 | 1516195 | 2017 | 21 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Facile route to achieve mesoporous Cu(OH)2 nanorods on copper foam for high-performance supercapacitor electrode
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this work, the three-dimensional (3D) mesoporous Cu(OH)2 nanorods were fabricated on copper foam via a facile and cost-effective surface oxidation method, a product that can be directly used as a binder-free electrode for supercapacitors. The synthesized 3D Cu(OH)2 nanorods demonstrate high surface area, uniform pore size distribution characteristics and 3D quasi-connect structures, and the copper foam substrate not only undertakes the role of current collector but also the copper source of the reaction. Therefore, the as-prepared electrode can provide numerous active sites for redox reactions, exhibit low intrinsic resistance and shorten the ions diffusion pathway. Benefiting from that, the following characteristics are obtained: high capacitance of 2.151 F cmâ2, good rate capability of 88.3% retention upon increasing the current density by 10 times, good coulombic efficiency of 89.4% and good cycling durability of 97.3% retention after 5000 cycles. In addition, an asymmetric supercapacitor is assembled using the mesoporous Cu(OH)2 as positive electrode and activated carbon as negative electrode. The device delivers a high energy density of 4.152 mW h cmâ3 and a high power density of 383.222 mW cmâ3. The results suggest a great potential for fabrication of high performance energy storage devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 699, 30 March 2017, Pages 706-712
Journal: Journal of Alloys and Compounds - Volume 699, 30 March 2017, Pages 706-712
نویسندگان
Dong He, Guanda Wang, Guolong Liu, Jihao Bai, Hui Suo, Chun Zhao,