کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
184386 459574 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Abrupt change with surfactant concentration in the surface morphology of the electrodeposited manganese oxide films for electrochemical capacitors
ترجمه فارسی عنوان
تغییر ناگهانی با غلظت سورفاکتانت در مورفولوژی سطوح فیلم های اکسید منگنز الکترودهایی برای خازن های الکتروشیمیایی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی

Manganese oxide films are produced by electrodeposition on a graphite sheet from a solution of manganese oxide with tetradecyltrimethylammonium bromide (TTAB) added as a surfactant. Effects of TTAB concentration on electrochemical and morphological properties of the films are observed. Under the bath conditions used in this work, the specific capacitance of the electrodeposited manganese oxide films has a maximum value of 343 F/g for TTAB concentration of 0.01 M. Change in the specific capacitance of the films with TTAB concentration is found to be associated with corresponding changes in the surface morphology of the films at those concentrations. Addition of TTAB up to 0.01 M is observed to increase the surface area of electrodeposited manganese oxide films, as the surface of the films is well covered with flake-like or petal-shaped arrays of nanofibers forming a three-dimensional network. Higher concentrations of TTAB than 0.01 M reduce the surface area of the films due to agglomeration and collapse of the nanofibers. The addition of 0.01 M TTAB to an electrochemical bath also improves supercapacitor capability such as rate capability, cycling stability, and electrode series resistance.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 160, 1 April 2015, Pages 50–56
نویسندگان
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