کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7735310 | 1497958 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Carbon nanotube-assisted electrodeposition. Part II: Superior pseudo-capacitive behavior of manganese oxide film electrodeposited at high current densities
ترجمه فارسی عنوان
الکترولودرینگ با کمک نانولوله کربنی. قسمت دوم: رفتار شبه خازنی فوق العاده فیلم اکسید منگنز الکترودهایی در تراکم های جاری بالا
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کلمات کلیدی
مخزن سوپر اکسید منگنز، نانولوله های کربنی، فیلم نانوساختار، الکترود شبه خازنی،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
A practical approach for controlling the morphology and electrochemical properties of electroactive materials is proposed. In this study, manganese oxide films were galvanostatically deposited in the presence of a small amount of carbon nanotube (CNT). The resulting film cannot be considered as a CNT-based nanocomposite, as no CNT is detected by electron microscopy. However, the manganese oxide electrodeposited delivers an excellent pseudo-capacitive behavior to be used as a superior supercapacitor. The samples prepared by applying a current density of 3.0Â mAÂ cmâ2 showed a specific capacitance of 280Â FÂ gâ1. As it seems that the capacitance of this electrode is related to the chemisorption of the alkali cation, an extremely high specific capacitance of 434Â FÂ gâ1 was achieved in a saturated medium of Li electrolyte. This high specific capacitance can be attributed to a bulk process. The presence of carbon nanotubes results in the formation of nanostructured films which provide a better accessibility for capacitive behavior. Although the exact mechanism for this phenomenon is still vague, the presence of carbon nanotubes (probably as a solid charge carrier) close to the electrode surface is apparently responsible for a different pathway for the electrodeposition process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 274, 15 January 2015, Pages 1315-1321
Journal: Journal of Power Sources - Volume 274, 15 January 2015, Pages 1315-1321
نویسندگان
Ali Eftekhari, Foroogh Molaei,