Porphyrin–graphene oxide frameworks for long life sodium ion batteries

Kumar, Nanjundan Ashok, Gaddam, Rohit Ranganathan, Suresh, Moorthy, Varanasi, Srinivasa Rao, Yang, Dongfang, Bhatia, Suresh K. and Zhao, X. S. (2017) Porphyrin–graphene oxide frameworks for long life sodium ion batteries. Journal of Materials Chemistry A, 5 25: 13204-13211. doi:10.1039/c7ta02370g


Author Kumar, Nanjundan Ashok
Gaddam, Rohit Ranganathan
Suresh, Moorthy
Varanasi, Srinivasa Rao
Yang, Dongfang
Bhatia, Suresh K.
Zhao, X. S.
Title Porphyrin–graphene oxide frameworks for long life sodium ion batteries
Journal name Journal of Materials Chemistry A   Check publisher's open access policy
ISSN 2050-7488
2050-7496
Publication date 2017-07-07
Year available 2017
Sub-type Article (original research)
DOI 10.1039/c7ta02370g
Open Access Status Not yet assessed
Volume 5
Issue 25
Start page 13204
End page 13211
Total pages 8
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Language eng
Subject 1600 Chemistry
2105 Renewable Energy, Sustainability and the Environment
2500 Materials Science
Abstract Herein, we demonstrate that a porphyrin interspersed graphene-oxide framework with a d-spacing of ∼7.67 Å can significantly enhance the cycling stability of graphene-based anodes in sodium-ion batteries. These robust electrodes can deliver a reversible capacity of ∼200 mA h g at a current density of 100 mA g in the 20 cycle with negligible capacity fading over 700 cycles. In addition to the superior rate tolerance, the specific capacity was stable even after a resting time of one month. The excellent performance may be nested in the larger interlayer spacing, and rich nitrogen content along with the defect sites available for sodium interaction. Experimental studies and density functional theory calculations presented in this work give insights into the structure-property relationship of porphyrin-graphene oxide frameworks and their electrochemical performance.
Formatted abstract
Herein, we demonstrate that a porphyrin interspersed graphene-oxide framework with a d-spacing of ∼7.67 Å can significantly enhance the cycling stability of graphene-based anodes in sodium-ion batteries. These robust electrodes can deliver a reversible capacity of ∼200 mA h g−1 at a current density of 100 mA g−1 in the 20th cycle with negligible capacity fading over 700 cycles. In addition to the superior rate tolerance, the specific capacity was stable even after a resting time of one month. The excellent performance may be nested in the larger interlayer spacing, and rich nitrogen content along with the defect sites available for sodium interaction. Experimental studies and density functional theory calculations presented in this work give insights into the structure–property relationship of porphyrin–graphene oxide frameworks and their electrochemical performance.
Keyword Chemistry, Physical
Energy & Fuels
Materials Science, Multidisciplinary
Chemistry
Energy & Fuels
Materials Science
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 2015000144
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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School of Chemistry and Molecular Biosciences
 
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Created: Wed, 28 Jun 2017, 13:49:51 EST by Ashok Kumar Nanjundan on behalf of School of Chemical Engineering