Sandwich-like graphene/polypyrrole/layered double hydroxide nanowires for high-performance supercapacitors

Li, Xuejin, Zhang, Yu, Xing, Wei, Li, Li, Xue, Qingzhong and Yan, Zifeng (2016) Sandwich-like graphene/polypyrrole/layered double hydroxide nanowires for high-performance supercapacitors. Journal of Power Sources, 331 67-75. doi:10.1016/j.jpowsour.2016.09.034


Author Li, Xuejin
Zhang, Yu
Xing, Wei
Li, Li
Xue, Qingzhong
Yan, Zifeng
Title Sandwich-like graphene/polypyrrole/layered double hydroxide nanowires for high-performance supercapacitors
Journal name Journal of Power Sources   Check publisher's open access policy
ISSN 0378-7753
1873-2755
Publication date 2016-11-01
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.jpowsour.2016.09.034
Open Access Status Not yet assessed
Volume 331
Start page 67
End page 75
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
Subject 2105 Renewable Energy, Sustainability and the Environment
2102 Energy Engineering and Power Technology
1606 Physical and Theoretical Chemistry
2208 Electrical and Electronic Engineering
Abstract Electrode design in nanoscale is considered to be ultra-important to construct a superb capacitor. Herein, a sandwich-like composite was made by combining graphene/polypyrrole (GPPY) with nickel-aluminum layered double hydroxide nanowires (NiAl-NWs) via a facile hydrothermal method. This sandwich-like architecture is promising in energy storage applications due to three unique features: (1) the conductive GPPY substrate not only effectively prevents the layered double hydroxides species from aggregating, but also considerably facilitates the electron transmission; (2) the ultrathin NiAl-NWs ensure a maximum exposure of active Ni2+, which can improve the efficiency of rapid redox reactions even at high current densities; (3) the sufficient space between anisotropic NiAl-NWs can accommodate a large volume change of the nanowires to avoid their collapse or distortion during the reduplicative redox reactions. Keeping all these unique features in mind, when the as-prepared composite was applied to supercapacitors, it presented an enhanced capacitive performance in terms of high specific capacitance (845 F g(-1)), excellent rate performance (67% retained at 30 A g(-1)), remarkable cyclic stability (92% maintained after 5000 cycles) and large energy density (40.1 Wh.Kg(-1)). This accomplishment in the present work inspires an innovative strategy of nanoscale electrode design for high-rate performance supercapacitor electrodes containing pseuducapacitive metal oxide. (C) 2016 Elsevier B.V. All rights reserved.
Formatted abstract
Electrode design in nanoscale is considered to be ultra-important to construct a superb capacitor. Herein, a sandwich-like composite was made by combining graphene/polypyrrole (GPPY) with nickel-aluminum layered double hydroxide nanowires (NiAl-NWs) via a facile hydrothermal method. This sandwich-like architecture is promising in energy storage applications due to three unique features: (1) the conductive GPPY substrate not only effectively prevents the layered double hydroxides species from aggregating, but also considerably facilitates the electron transmission; (2) the ultrathin NiAl-NWs ensure a maximum exposure of active Ni2+, which can improve the efficiency of rapid redox reactions even at high current densities; (3) the sufficient space between anisotropic NiAl-NWs can accommodate a large volume change of the nanowires to avoid their collapse or distortion during the reduplicative redox reactions. Keeping all these unique features in mind, when the as-prepared composite was applied to supercapacitors, it presented an enhanced capacitive performance in terms of high specific capacitance (845 F g−1), excellent rate performance (67% retained at 30 A g−1), remarkable cyclic stability (92% maintained after 5000 cycles) and large energy density (40.1 Wh·Kg−1). This accomplishment in the present work inspires an innovative strategy of nanoscale electrode design for high-rate performance supercapacitor electrodes containing pseuducapacitive metal oxide.
Keyword Graphene
LDH
Nanowire
Polypyrrole
Supercapacitor
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 21476264
R201215
ts20130929
15CX05029A
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Australian Institute for Bioengineering and Nanotechnology Publications
 
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