کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6613181 | 459588 | 2014 | 48 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrode properties of defect-introduced graphene sheets for electrochemical capacitors using aqueous electrolyte
ترجمه فارسی عنوان
خواص الکترود ورق های گرافن معرفی شده با نقص برای خازن های الکتروشیمیایی با استفاده از الکترولیت آبی
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کلمات کلیدی
گرافین، کاستی، خازن های الکتروشیمیایی، اموال الکترود،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Electrode properties of defect-introduced graphene sheets (GSs) in an acid aqueous electrolyte as an electrode material for electrochemical capacitors were investigated. Defects were successfully introduced into graphene structures through repeated oxidation of graphite followed by rapid thermal exfoliation. The specific surface area was increased up to 991 m2Â gâ1 by the defect introduction process. A GS electrode with a high amount of defects maintained a stable specific capacitance of 136 F gâ1 at a current density of 500 mA gâ1 for 1000 cycles, which is larger than that of GSs with a low amount of defects. A large specific capacitance of 115 F gâ1 was also exhibited at a high current density of 5000Â mAÂ gâ1. These capacitances were almost maintained even after the specific surface area was reduced by the sheet-restacking process, indicating that the large capacitance is derived from the defects introduced in the graphene structure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 142, 1 October 2014, Pages 240-246
Journal: Electrochimica Acta - Volume 142, 1 October 2014, Pages 240-246
نویسندگان
Wonkyun Lee, Shinya Suzuki, Masaru Miyayama,