Ultrathin sandwich-like MoS2@N-doped carbon nanosheets for anodes of lithium ion batteries
- Authors
- Jeong, Jae-Min; Lee, Kyoung G.; Chang, Sung-Jin; Kim, Jung Won; Han, Young-Kyu; Lee, Seok Jae; Choi, Bong Gill
- Issue Date
- Jan-2015
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- NANOSCALE, v.7, no.1, pp 324 - 329
- Pages
- 6
- Journal Title
- NANOSCALE
- Volume
- 7
- Number
- 1
- Start Page
- 324
- End Page
- 329
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/45768
- DOI
- 10.1039/c4nr06215a
- ISSN
- 2040-3364
2040-3372
- Abstract
- In this work, we report on a simple and scalable process to synthesize the core-shell nanostructure of MoS2@N-doped carbon nanosheets (MoS2@C), in which polydopamine is coated on the MoS2 surface and is then carbonized. An intensive investigation using transmission electron microscopy and Raman spectroscopy reveals that the as-synthesized MoS2@C possesses a nanoscopic and ultrathin layer of MoS2 sheets with a thin and conformal coating of carbon layers (similar to 3 nm). The MoS2@C demonstrates a superior electrochemical performances as an anode material for lithium ion batteries compared to exfoliated MoS2 and bulk MoS2 samples. This unique core-shell structure is capable of delivering an excellent Li+ ion charging-discharging process as follows: a specific capacity as high as 1239 mA h g(-1), a high rate capability even at a high current rate of 10 A g(-1) while retaining 597 mA h g(-1), and a good cycle stability over 200 cycles at a high current rate of 2 A g(-1).
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Collections - College of Natural Sciences > Department of Chemistry > 1. Journal Articles
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