کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7888187 | 1509793 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Barnacle-like manganese oxide decorated porous carbon nanofibers for high-performance asymmetric supercapacitors
ترجمه فارسی عنوان
نانو الیاف کربن متخلخل برای اکسیژن نانوکامپوزیتی با کارایی بالا
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کلمات کلیدی
خازن کامپوزیت کربن، الیاف، سطوح اکسید منگنز،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
In this study, barnacle-like manganese oxide (MnO2) decorated porous carbon nanofibers (PCNF) were synthesized using electrospinning and the chemical precipitation method for high-performance asymmetric supercapacitors. The porous structure of PCNF was acquired using poly(styrene-co-acrylonitrile) in the electrospinning solution. In order to obtain the optimized barnacle-like MnO2 on PCNF (MnO2-PCNF), the barnacle-like MnO2 was synthesized using different synthetic times (namely, 1.5, 3.0, and 7.0 min) of the chemical precipitation. Among them, the optimized MnO2-PCNF for 3.0 min exhibited the well-dispersed MnO2 on the PCNF with the nano-size of 190-218 nm. The optimized MnO2-PCNF showed the superior specific capacitance of 209.8 F gâ1 at 10 mV sâ1 and the excellent high-rate performance of 160.3 F gâ1 at 200 mV sâ1 with the capacitance retention of 98.7% at 100 mV sâ1 for 300 cycles. In addition, electrochemical performances of asymmetric cell (constructed activated carbon and MnO2-PCNF) showed the high specific capacitance of 60.6 F gâ1 at the current density of 0.5 A gâ1, high-rate capacitance of 30.0 F gâ1 at the current density of 10 A gâ1, and the excellent energy density of 30.3-15.0 Wh kgâ1 in the power density range from 270 to 9000 W kgâ1. The enhanced electrochemical performance can be explained by the synergistic effects of barnacle-like MnO2 nanoparticles with a high active area related to high specific capacitance and well-dispersed MnO2 with a short ion diffusion length related to the excellent high-rate performance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 5, 1 April 2018, Pages 4883-4890
Journal: Ceramics International - Volume 44, Issue 5, 1 April 2018, Pages 4883-4890
نویسندگان
Dong-Yo Shin, Geon-Hyoung An, Hyo-Jin Ahn,