Nitrogen-doped graphene fiber webs for multi-battery energy storage
In: Nanoscale, Jg. 11 (2019), S. 6334-6342
Online
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Zugriff:
Freestanding carbon-based electrodes with large surface areas and pore volumes are essential to fast ion transport and long-term energy storage. Many of the current porous carbon substrates are composed of particulates, making it difficult to form a self-supported structure. Herein, novel highly porous nitrogen-doped graphene fiber webs (N-GFWs) are prepared using a facile wet-spinning method. The wet chemical process facilitates simultaneous N-doping and surface wrinkling of graphene fibers in a one-pot process. The atomic structure and electrical conductivity of N-GFWs are tailored by tuning the degree of N-doping and thermal reduction for multi-battery charge storage in both lithium-oxygen batteries (LOBs) and lithium-sulfur batteries (LSBs). The N-GFW900 electrode presents an excellent electrocatalytic activity and the cathode with a high areal loading of 7.5 mg cm-2 delivers a remarkable areal capacity of 2 mA h cm-2 at 0.2 mA cm-2 for LOBs. The N-GFW700 interlayer with abundant oxygenated and nitrogen functional groups demonstrates effective entrapment of polysulfides in LSBs, delivering a much improved specific capacity after 200 cycles at 0.5C with a remarkable decay rate of 0.04%. The current approach paves the way for rational design of porous graphene-based electrodes, satisfying multifunctional requirements for high-energy storage applications.
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Nitrogen-doped graphene fiber webs for multi-battery energy storage
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Autor/in / Beteiligte Person: | Xiao, Fei ; Yao, Shanshan ; Ihsan-Ul-Haq, Muhammad ; Shao, Minhua ; Sadighi, Zoya ; Woon Gie Chong ; Cui, Jiang ; Wu, Junxiong ; Jang Kyo Kim |
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Zeitschrift: | Nanoscale, Jg. 11 (2019), S. 6334-6342 |
Veröffentlichung: | Royal Society of Chemistry (RSC), 2019 |
Medientyp: | unknown |
ISSN: | 2040-3372 (print) ; 2040-3364 (print) |
DOI: | 10.1039/c8nr10025j |
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