کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
194064 459784 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and capacitive properties of cobalt–nickel oxides/carbon nanotube composites
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Preparation and capacitive properties of cobalt–nickel oxides/carbon nanotube composites
چکیده انگلیسی

In this paper, nickel–cobalt oxides/carbon nanotube (CNT) composites were prepared by adding and thermally decomposing nickel and cobalt nitrates directly onto the surface of carbon nanotube/graphite electrode to form nickel and cobalt oxides. Carbon nanotubes used in this paper were grown directly on graphite substrate by chemical vapor deposition technique. The capacitive behavior of nickel–cobalt oxides/CNT electrode was investigated by cyclic voltammetry and galvanostatic charge–discharge method in 1 M KOH aqueous solutions. The results show that nickel–cobalt oxides/CNT composite electrode has excellent charge–discharge cycle stability (0.2% and 3.6% losses of the specific capacitance are found at the 1000th and 2000th charge–discharge cycles, respectively) and good charge–discharge properties at high currrent density. Additionally, the effect of Ni/Co molar ratio on specific capacitance of the composite electrode was investigated and the highest specific capacitance (569 F g−1 at 10 mA cm−2) is obtained at Ni/Co molar ratio = 1:1.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 52, Issue 9, 15 February 2007, Pages 2959–2965
نویسندگان
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