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Ultrathin MoS2@C layered structure as an anode of lithiumion battery

Published online by Cambridge University Press:  11 January 2016

Jae-Min Jeong ,
Seunghwan Seok ,
Bong Gill Choi  and
Do Hyun Kim
Jae-Min Jeong
Affiliation:
Department of Chemical & Biomolecular engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea.
Seunghwan Seok
Affiliation:
Department of Chemical & Biomolecular engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea.
Bong Gill Choi
Affiliation:
Department of Chemical Engineering, Kangwon National University, Samcheok 245-711, Republic of Korea.
Do Hyun Kim*
Affiliation:
Department of Chemical & Biomolecular engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea.
*
*(Email: dohyun.kim@kaist.edu)
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Abstract

We report a simple and scalable process to synthesize the core–shellnanostructure of MoS2@N-doped carbon nanosheets (MoS2@C),in which polydopamine is coated on the MoS2 surface and thencarbonized. Transmission electron microscopy reveals that the as-synthesizedMoS2@C possesses a nanoscopic and ultrathin layer ofMoS2 sheets with a thin and conformal coating of carbon layers(∼5 nm). The MoS2@C demonstrates a superiorelectrochemical performance as an anode material for lithium ion batteriescompared to exfoliated MoS2 sample. This unique core–shellstructure is capable of excellent delivery of Li+ ion incharging–discharging process: a specific capacity as high as 1239 mAh g−1, a high rate of charging-discharging capability evenat a high current rate of 10 A g−1 while retaining 597 mAh g−1, and a good cycle stability over 70 cycles at a highcurrent rate of 2 A g−1.

Keywords

energy storagelayeredMo

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Type
Articles
Information
MRS Advances , Volume 1 , Issue 15: Energy and Sustainability , 2016 , pp. 1021 - 1027
Copyright
Copyright © Materials Research Society 2016 

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