Electrochemical lithium-ion storage properties of quinone molecules encapsulated in single-walled carbon nanotubes

We investigated the electrochemical lithium-ion storage properties of 9,10-anthraquinone (AQ) and 9,10-phenanthrenequinone (PhQ) molecules encapsulated in the inner hollow core of single-walled carbon nanotubes (SWCNTs). The structural properties of the obtained encapsulated systems were characteriz...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2016-04, Vol.18 (15), p.10411-10418
Main Authors: Ishii, Yosuke, Tashiro, Kosuke, Hosoe, Kento, Al-Zubaidi, Ayar, Kawasaki, Shinji
Format: Article
Language:English
Subjects:
Electrolytes
Encapsulation
Fourier transforms
Infrared spectroscopy
Quinones
Single wall carbon nanotubes
Stores
Synchrotrons
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Summary:We investigated the electrochemical lithium-ion storage properties of 9,10-anthraquinone (AQ) and 9,10-phenanthrenequinone (PhQ) molecules encapsulated in the inner hollow core of single-walled carbon nanotubes (SWCNTs). The structural properties of the obtained encapsulated systems were characterized by electron microscopy, synchrotron powder X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and Raman spectroscopy. We found that almost all quinone molecules encapsulated in the SWCNTs can store Li-ions reversibly. Interestingly, the undesired capacity fading, which comes from the dissolution of quinone molecules into the electrolyte, was suppressed by the encapsulation. It was also found that the overpotential of AQ was decreased by the encapsulation, probably due to the high-electric conductivity of SWCNTs.
ISSN:1463-9076
1463-9084
DOI:10.1039/c6cp01103a