کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
183736 459556 2015 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hollowed-out tubular carbon@MnO2 hybrid composites with controlled morphology derived from kapok fibers for supercapacitor electrode materials
ترجمه فارسی عنوان
کامپوزیت هیبرید کربن لوله ای توخالف شده با مورفولوژی کنترل شده مشتق شده از الیاف کوکک برای مواد الکترودهای سوپرکاپاسیون
کلمات کلیدی
فیبر کاپک توخالی لوله ای کامپوزیت های ترکیبی ابرخازنها
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• Hollowed-out tubular carbon@MnO2 composites were prepared derived from KF.
• The morphology and electrochemical performance of composites can be facilely controlled.
• The tubular structure and synergistic effect of hybrids enhance the electrochemical property.
• The composites show good electrochemical performance in the testing temperature.
• KF are expected to design other composites with the controlled tubular structure.

The hollowed-out tubular carbon@MnO2 hybrid composites with hierarchical morphology have been successfully prepared via the redox reaction between MnO4− and tubular carbonized kapok fiber. The morphology and electrochemical performance of the as-prepared hybrid composites can be facilely controlled by adjusting the concentration of MnO4−. The carbon@MnO2 electrode with tubular structure of the assembled MnO2 nanosheets possess the highest specific capacitance of 321 F g−1 at a current density of 0.5 A g−1 with the capacitance retention of 94% at a scan rate of 100 mV s−1 for 800 cycles in 1.0 M Na2SO4 solution. The studies on the temperature dependence indicated that the specific capacitance increased with the increase in the testing temperature. The results reveal that the introduction of the highly conductive carbon in hybrid structure is one of the effective methods to improve the electrochemical performance of MnO2 electrodes whose poor conductivity limit their capacitance, cycling life and rate performance. It also can be concluded that it is crucial to design and control the morphology of materials in practical application for supercapacitor.

Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 178, 1 October 2015, Pages 709–720
نویسندگان
, , , ,