کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6615484 | 459622 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Investigation of diluted ionic liquid 1-ethyl-3-methyl-imidazolium tetrafluoroborate electrolytes for intercalation-like electrodes used in supercapacitors
ترجمه فارسی عنوان
بررسی الکترولیت تترافلوروبارات مایع یونی رقیق شده با یونی برای الکترود های متداول مانند مورد استفاده در ابررساناها
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کلمات کلیدی
اکسید گرافیت، گرافن، فعال سازی الکتروشیمیایی، مایع یونی، خازن دو لایه الکتروشیمیایی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
The activation behavior and achievable specific capacitance of intercalation-like carbon materials, like partially reduced graphite oxide (GOpr), employing pure and diluted ionic liquids was investigated. The electrochemical activation of two different GOprs with interlayer distances of 3.9 and 4.4Â Ã
and a graphite was studied with the ionic liquid 1-ethyl-3-methyl-imidazolium tetrafluoroborate (EMIMBF4). Furthermore, the effect of the organic solvent acetonitrile (AN) on the activation was tested by a stepwise dilution of the ionic liquid. It is shown that a rudimentary electrochemical activation of GOpr is possible with EMIMBF4. However, the resulting specific capacitance was below 100Â FÂ gâ1 indicating an incomplete activation reaction. By stepwise dilution of EMIMBF4 with AN the specific capacitance was increased up to approximately 180Â FÂ gâ1. Therefore, it seems that the electrochemical activation of intercalation-like carbon materials is based on both a reaction with the ions as well as with the employed solvent. Moreover, this experimental study indicates that an increased molarity of organic electrolytes has no influence on the maximum achievable specific capacitance
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 110, 1 November 2013, Pages 234-239
Journal: Electrochimica Acta - Volume 110, 1 November 2013, Pages 234-239
نویسندگان
M.M. Hantel, A. PÅatek, T. Kaspar, R. Nesper, A. Wokaun, R. Kötz,