Self-assembling synthesis of free-standing nanoporous graphene-transition- metal oxide flexible electrodes for high-performance lithium-ion batteries and supercapacitors

Huang, Xiaodan, Sun, Bing, Chen, Shuangqiang and Wang, Guoxiu (2014) Self-assembling synthesis of free-standing nanoporous graphene-transition- metal oxide flexible electrodes for high-performance lithium-ion batteries and supercapacitors. Chemistry - An Asian Journal, 9 1: 206-211. doi:10.1002/asia.201301121


Author Huang, Xiaodan
Sun, Bing
Chen, Shuangqiang
Wang, Guoxiu
Title Self-assembling synthesis of free-standing nanoporous graphene-transition- metal oxide flexible electrodes for high-performance lithium-ion batteries and supercapacitors
Journal name Chemistry - An Asian Journal   Check publisher's open access policy
ISSN 1861-4728
1861-471X
Publication date 2014-01-01
Year available 2013
Sub-type Article (original research)
DOI 10.1002/asia.201301121
Open Access Status Not yet assessed
Volume 9
Issue 1
Start page 206
End page 211
Total pages 6
Place of publication Weinheim, Germany
Publisher Wiley - V C H Verlag GmbH & Co. KGaA
Language eng
Formatted abstract
The synthesis of nanoporous graphene by a convenient carbon nanofiber assisted self-assembly approach is reported. Porous structures with large pore volumes, high surface areas, and well-controlled pore sizes were achieved by employing spherical silica as hard templates with different diameters. Through a general wet-immersion method, transition-metal oxide (Fe3O4, Co3O4, NiO) nanocrystals can be easily loaded into nanoporous graphene papers to form three-dimensional flexible nanoarchitectures. When directly applied as electrodes in lithium-ion batteries and supercapacitors, the materials exhibited superior electrochemical performances, including an ultra-high specific capacity, an extended long cycle life, and a high rate capability. In particular, nanoporous Fe3O4-graphene composites can deliver a reversible specific capacity of 1427.5 mAh g-1 at a high current density of 1000 mA g-1 as anode materials in lithium-ion batteries. Furthermore, nanoporous Co3O4-graphene composites achieved a high supercapacitance of 424.2 F g-1. This work demonstrated that the as-developed freestanding nanoporous graphene papers could have significant potential for energy storage and conversion applications.
Keyword Electrochemistry
Graphene
Nanostructures
Supercapacitors
Transition metals
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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