کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6615476 | 459622 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Manganese oxide/graphene oxide composites for high-energy aqueous asymmetric electrochemical capacitors
ترجمه فارسی عنوان
کامپوزیت اکسید منگنز / گرافیت اکسید برای خازن های الکتروشیمیایی نامتقارن با انرژی بالا
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
A high-energy aqueous asymmetric electrochemical capacitor was developed using manganese dioxide (α-MnO2)/graphene oxide (GO) nanocomposites. The nanostructured α-MnO2 was prepared from micron-sized commercial electrolytic manganese dioxide (EMD) via a hydrothermal reaction in the presence and absence of sodium dodecylsulphate (SDS), α-MnO2(SDS) and α-MnO2, respectively. Unlike the as-prepared α-MnO2, the presence of SDS during the hydrothermal reaction conferred different morphologies on the intermediate precursors for the α-MnO2(SDS). Also, the XRD patterns showed that the α-MnO2(SDS) are more crystalline than the as-prepared α-MnO2. The superior electrochemical performance of the α-MnO2(SDS)/GO composite (280 F gâ1, 35 Wh kgâ1, and 7.5 kW kgâ1 at 0.5 A gâ1) coupled with excellent long cycle life clearly indicates that this electrode system has the potential of being developed as an efficient aqueous asymmetric electrochemical capacitor. The high performance of the α-MnO2(SDS)/GO composite was interpreted in terms of the enhanced crystallinity of the α-MnO2(SDS). Interestingly, the electrochemical performance is comparable to or even better than those reported for the more conductive graphene/MnO2 composites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 110, 1 November 2013, Pages 228-233
Journal: Electrochimica Acta - Volume 110, 1 November 2013, Pages 228-233
نویسندگان
Charl J. Jafta, Funeka Nkosi, Lukas le Roux, Mkhulu K. Mathe, Mesfin Kebede, Katlego Makgopa, Yang Song, Dennis Tong, Munetaka Oyama, Ncholu Manyala, Shaowei Chen, Kenneth I. Ozoemena,