کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1283852 1497934 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced capacitive properties of commercial activated carbon by re-activation in molten carbonates
ترجمه فارسی عنوان
خصوصیات خازنی بهبود یافته کربن فعال با فعال سازی مجدد در کربنات های مذاب
کلمات کلیدی
کربن فعال، مخزن سوپر فعال سازی کربنات خرد شده
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی


• Commercial activated carbons are re-activated in molten carbonates.
• The origin and re-activated carbons are evaluated for supercapacitor.
• Activated carbons after molten carbonate treatment show enhanced capacitive performance.
• Rationalizations on mechanism and structure-activity correlations are provided.

Simple, affordable and green methods to improve capacitive properties of commercial activated carbon (AC) are intriguing since ACs possess a predominant role in the commercial supercapacitor market. Herein, we report a green reactivation of commercial ACs by soaking ACs in molten Na2CO3–K2CO3 (equal in mass ratios) at 850 °C combining the merits of both physical and chemical activation strategies. The mechanism of molten carbonate treatment and structure-capacitive activity correlations of the ACs are rationalized. Characterizations show that the molten carbonate treatment increases the electrical conductivity of AC without compromising its porosity and wettability of electrolytes. Electrochemical tests show the treated AC exhibited higher specific capacitance, enhanced high-rate capability and excellent cycle performance, promising its practical application in supercapacitors. The present study confirms that the molten carbonate reactivation is a green and effective method to enhance capacitive properties of ACs.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 298, 1 December 2015, Pages 74–82
نویسندگان
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