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https://hdl.handle.net/2440/99819
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Type: | Journal article |
Title: | Sandwich-like nitrogen-doped porous carbon/graphene nanoflakes with high-rate capacitive performance |
Author: | Zhang, Y. Tao, B. Xing, W. Zhang, L. Xue, Q. Yan, Z. |
Citation: | Nanoscale, 2016; 8(15):7889-7898 |
Publisher: | Royal Society of Chemistry |
Issue Date: | 2016 |
ISSN: | 2040-3364 2040-3372 |
Statement of Responsibility: | Yu Zhang, Binglin Tao, Wei Xing, Lei Zhang, Qingzhong Xue and Zifeng Yan |
Abstract: | Sandwich-like nitrogen-doped porous carbon/graphene nanoflakes (NPCFs) are prepared via a two-step approach, firstly by using in situ polymerization of pyrrole (Py) on the surface of graphene oxide (GO) and then by KOH activation under an Ar atmosphere. As the shape-directing agent and conductive matrix, graphene sheets play an important role in enhancing NPCFs' electrochemical performance. The NPCFs exhibit high specific surface area (2502 m² g⁻¹), short ion diffusion path (ca. 30 nm), high conductivity (72 S m⁻¹) and a considerable nitrogen level (6.3 wt%). These intriguing features render NPCFs a promising electrode material for electrochemical supercapacitors, which displays high specific capacitance (341 F g⁻¹), excellent rate capability (over 71% retention ratio at 50 A g⁻¹) and outstanding cycling stability (almost no capacitance loss after 2000 cycles) in a 30 wt% KOH aqueous electrolyte. Besides, the assembled symmetrical supercapacitor delivers a high gravimetric energy density of 11.3 Wh kg⁻¹ in an aqueous electrolyte and 66.4 Wh kg⁻¹ in an organic electrolyte. |
Rights: | This journal is © The Royal Society of Chemistry 2016 |
DOI: | 10.1039/c5nr05151g |
Grant ID: | http://purl.org/au-research/grants/arc/DE150101234 |
Published version: | http://dx.doi.org/10.1039/c5nr05151g |
Appears in Collections: | Aurora harvest 3 Chemical Engineering publications |
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