کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7714831 | 1497441 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A self-supporting graphene/MnO2 composite for high-performance supercapacitors
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A self-supporting graphene/MnO2 composite for high-performance supercapacitors A self-supporting graphene/MnO2 composite for high-performance supercapacitors](/preview/png/7714831.png)
چکیده انگلیسی
A self-supporting graphene (SSG) was prepared by electrochemical re-intercalation of a flexible graphite sheet (FGS) in the (NH4)2S2O8 electrolyte. The in-situ grown SSG rooted in the unexpanded FGS substrate which acted as a current collector. A thin, homogeneous and conformal MnO2 layer was coated on the surface of SSG by microwave-assisted deposition. The obtained FGS-SSG/MnO2 electrode displayed the areal and specific capacitances as high as 2.8 F cmâ2 and 465 F gâ1 at 2 mV sâ1. An asymmetric supercapacitor of FGS-SSG/MnO2//FGS-SSG was assembled, which exhibited a maximum energy density of 25.6 Wh kgâ1 at a power density of 1000 W kgâ1. In addition, the capacitance retention ratio of FGS-SSG/MnO2//FGS-SSG reached 87% at the current density of 1 A gâ1 after 5000 charge-discharge cycles. High electrochemical properties indicate that the FGS-SSG/MnO2 is a promising electrode for supercapacitors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 32, 24 August 2015, Pages 10176-10184
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 32, 24 August 2015, Pages 10176-10184
نویسندگان
Guoxiang Xin, Yanhui Wang, Jinhui Zhang, Shaopei Jia, Jianbing Zang, Yafei Wang,