کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4766754 1424107 2017 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nitrogen-doped graphene forests as electrodes for high-performance wearable supercapacitors
ترجمه فارسی عنوان
جنگل های گرافن تحت تاثیر نیتروژن به عنوان الکترود برای ابررسانای پوشاننده با کارایی بالا
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
Recently, a graphene forest (GF) is synthesized by a plasma enhanced chemical vapor deposition (PECVD) process, which subverts the stereotyped morphology of vertical graphene. The GF is demonstrated to possess excellent performance in flexible and bendable electrical double-layer capacitors (EDLCs). In this work, synthesis process of the GF has been optimized and N-doped GF is successfully achieved by introducing NH3 as the nitrogen precursor during the PECVD process. The N-doping obviously affects the morphology of the GF and the in-plane conductivity of GF is desirably enhanced. The specific area capacitances and volumetric capacitances of N-doped GF-based EDLC increases 26% and 89% in average, respectively, at different current densities compared with the non-doped GF-based EDLC. In addition, both the energy and power densities are improved, and impressively, the energy densities improve 87% by the N-doping of GF electrodes. The GF-based EDLC also provides the desirable stability that no degradation can be observed within 10,000 cycles. Finally, the flexible N-doped GF-based EDLC is also tested as a wearable supercapacitor, exhibiting no capacitance decrease under the dynamic bending situation. Our approach to synthesize the N-doped GF electrodes can achieve the fine-scale nano-structured GF electrodes and provide a new way forward for improved energy storage devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 250, 1 October 2017, Pages 320-326
نویسندگان
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