NDLI: Graphene nanosheets, carbon nanotubes, graphite, and activated carbon as anode materials for sodium-ion batteries

Content Provider	Royal Society of Chemistry (RSC)
Author	Hsieh, Chien-Te Ger, Ming-Der Luo, Xu-Feng Chang, Jeng-Kuei Yang, Cheng-Hsien Pu, Nen-Wen Peng, You-Yu
Copyright Year	2015
Abstract	The electrochemical sodium-ion storage properties of graphene nanosheets (GNSs), carbon nanotubes (CNTs), mesocarbon microbeads (MCMBs), and activated carbon (AC) are investigated. An irreversible oxidation occurs for the AC electrode during desodiation, limiting its use in sodium-ion batteries. The MCMB electrode shows a negligible capacity (∼2 mA h g−1), since the graphitic structure has a low surface area and is thus not capable of storing a sufficient amount of Na+. In contrast, the CNT and GNS electrodes exhibit reversible capacities of 82 and 220 mA h g−1, respectively, at a charge–discharge rate of 30 mA g−1. The high electro-adsorption/desorption area, large number of Na+ entrance/exit sites, and a large d-spacing of GNSs contribute to their superior Na+ storage capacity. At a high rate of 5 A g−1, the GNS electrode still delivers a capacity of as high as 105 mA h g−1, indicating great high-power ability. The charge storage mechanism of the electrode is examined using an ex situ X-ray diffraction technique.
Starting Page	10320
Ending Page	10326
Page Count	7
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	3
Issue Number	19
Journal	Journal of Materials Chemistry A
DOI	10.1039/c5ta00727e
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	AC MCMB CNT GNS Electrochemistry Graphene Satellite navigation Carbon nanotube Activated carbon Electrode X-ray crystallography
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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