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Large-Scale DFT Simulation of Li-atom Insertion and Extraction in Quinons@SWCNT Rechargeable Battery Cathodes

Published online by Cambridge University Press:  12 February 2018

Takahiro Tsuzuki ,
Shuji Ogata  and
Masayuki Uranagase
Takahiro Tsuzuki
Affiliation:
Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Nagoya, Aichi466-8555, Japan
Shuji Ogata*
Affiliation:
Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Nagoya, Aichi466-8555, Japan
Masayuki Uranagase
Affiliation:
Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Nagoya, Aichi466-8555, Japan
*
*(Email: ogata@nitech.ac.jp)
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Abstract

The system of quinone molecules encapsulated in the single-wall carbon nanotube (SWCNT) has been proposed as a next-generation cathode electrode material for rechargeable battery. We investigate the complex interaction among the SWCNT, phenanthrene-quinone (PhQ), and Li atoms in the encapsulated system by using our original DFT code. We thereby find that the shape of the SWCNT changes significantly in the relaxed state depending on the extent of Li atoms inserted. The SWCNT shows a circular cylinder shape when no Li exists. With sufficient Li atoms inserted, the SWCNT is flattened. Substantial electron transfer from the PhQs to SWCNT is found. As for the dynamics of Li atoms in insertion or extraction process, we find that the Li atoms can take either of the two paths: one is along the inner wall of the SWCNT and the other is hopping on the PhQs.

Keywords

Lisimulationstorage
Type
Articles
Information
MRS Advances , Volume 3 , Issue 22: Energy and Sustainability , 2018 , pp. 1229 - 1234
Copyright
Copyright © Materials Research Society 2018 

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References

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