NDLI: Binder free three-dimensional sulphur/few-layer graphene foam cathode with enhanced high-rate capability for rechargeable lithium sulphur batteries.

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Binder free three-dimensional sulphur/few-layer graphene foam cathode with enhanced high-rate capability for rechargeable lithium sulphur batteries.

Content Provider	Semantic Scholar
Author	Kidambi, Piran R. Chen, Renjie Gao, Chenlong Peng, Xiao-Yu Ducati, Caterina Hofmann, Stephan Kumar, Ramachandran Vasant
Copyright Year	2014
Abstract	A novel ultra-lightweight three-dimensional (3-D) cathode system for lithium sulphur (Li-S) batteries has been synthesised by loading sulphur on to an interconnected 3-D network of few-layered graphene (FLG) via a sulphur solution infiltration method. A free-standing FLG monolithic network foam was formed as a negative of a Ni metallic foam template by CVD followed by etching away of Ni. The FLG foam offers excellent electrical conductivity, an appropriate hierarchical pore structure for containing the electro-active sulphur and facilitates rapid electron/ion transport. This cathode system does not require any additional binding agents, conductive additives or a separate metallic current collector thus decreasing the weight of the cathode by typically ∼20-30 wt%. A Li-S battery with the sulphur-FLG foam cathode shows good electrochemical stability and high rate discharge capacity retention for up to 400 discharge/charge cycles at a high current density of 3200 mA g(-1). Even after 400 cycles the capacity decay is only ∼0.064% per cycle relative to the early (e.g. the 5th cycle) discharge capacity, while yielding an average columbic efficiency of ∼96.2%. Our results indicate the potential suitability of graphene foam for efficient, ultra-light and high-performance batteries.
File Format	PDF HTM / HTML
DOI	10.1039/c4nr00326h
PubMed reference number	24658177
Journal	Medline
Volume Number	6
Issue Number	11
Alternate Webpage(s)	http://www-g.eng.cam.ac.uk/hofmann/publications/pdfs/107.pdf.old
Alternate Webpage(s)	https://www.repository.cam.ac.uk/bitstream/handle/1810/246851/107-Xietal-Nanoscale-3DsulphurFLGcathodes-Nanoscale-accepted.pdf;jsessionid=CF117351EC67429D7E4CDFC300966523?sequence=1
Alternate Webpage(s)	http://www-g.eng.cam.ac.uk/hofmann/publications/pdfs/107.pdf
Alternate Webpage(s)	http://pubs.rsc.org/en/content/getauthorversionpdf/C4NR00326H
Alternate Webpage(s)	https://doi.org/10.1039/c4nr00326h
Journal	Nanoscale
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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