401 362

3D hierarchical porous graphene aerogel with tunable meso-pores on graphene nanosheets for high-performance energy storage

Title
3D hierarchical porous graphene aerogel with tunable meso-pores on graphene nanosheets for high-performance energy storage
Author
Kwan-San Hui
Keywords
LITHIUM-ION BATTERIES; ANODE MATERIALS; HIGH-CAPACITY; HIGH-POWER; REDUCED GRAPHENE; SUPERCAPACITORS; ELECTRODES; NETWORKS; OXIDE; FILMS
Issue Date
2015-09
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v. 5, NO 14229, Page. 1-11
Abstract
New and novel 3D hierarchical porous graphene aerogels (HPGA) with uniform and tunable mesopores (e.g., 21 and 53 nm) on graphene nanosheets (GNS) were prepared by a hydrothermal self-assembly process and an in-situ carbothermal reaction. The size and distribution of the meso-pores on the individual GNS were uniform and could be tuned by controlling the sizes of the Co3O4 NPs used in the hydrothermal reaction. This unique architecture of HPGA prevents the stacking of GNS and promises more electrochemically active sites that enhance the electrochemical storage level significantly. HPGA, as a lithium-ion battery anode, exhibited superior electrochemical performance, including a high reversible specific capacity of 1100 mAh/g at a current density of 0.1 A/g, outstanding cycling stability and excellent rate performance. Even at a large current density of 20 A/g, the reversible capacity was retained at 300 mAh/g, which is larger than that of most porous carbon-based anodes reported, suggesting it to be a promising candidate for energy storage. The proposed 3D HPGA is expected to provide an important platform that can promote the development of 3D topological porous systems in a range of energy storage and generation fields.
URI
https://www.nature.com/articles/srep14229http://hdl.handle.net/20.500.11754/27464
ISSN
2045-2322
DOI
10.1038/srep14229
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
Files in This Item:
3D hierarchical porous graphene aerogel with tunable meso-pores on graphene nanosheets for high-performance energy storage.pdfDownload
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE