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Synthesis of Surface-Functionalized WS2 Nanosheets and Performance as Li-Ion Battery Anodes
Open accessAbstract
Separation of bulk tungsten disulfide (or WS2) into few-layer two-dimensional (2-D) crystals is of interest because of their high surface area for certain chemical processes and size-dependent optical and electronic characteristics. Herein, we demonstrate a process that involves the physical separation of weakly bonded WS2 layers by use of a strong acid treatment (chlorosulfonic acid) at 2 mg/mL, followed by quenching in deionized (DI) water. X-ray photoelectron spectroscopy of the superacid-treated WS2 suggests the formation of W-O type bonds, signifying oxidation of tungsten and reduction of the sulfur phase. Thermogravimetric analysis showed a three-phase weight-loss pattern, suggesting acid functionalization of WS2 surfaces. We also studied the electrochemical behavior of an acid-treated WS2 anode in a lithium half-cell configuration that showed a three-step charge-discharge behavior, characteristic of a conversion reaction. The electrochemical capacity was 118 mAh/g after 50 cycles.
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Cited by
The chemistry of two-dimensional layered transition metal dichalcogenide nanosheets
Chhowalla, M., Shin, H. S., Eda, G., Li, L.-J., Loh, K. P., & Zhang, H. (2013) · Nature Chemistry · doi:10.1038/nchem.1589 · Cited by 10,034
Science and technology roadmap for graphene, related two-dimensional crystals, and hybrid systems
Ferrari, A. C., Bonaccorso, F., Fal'ko, V., Novoselov, K. S., Roche, S., Bøggild, P., Borini, S., Koppens, F. H. L., Palermo, V., Pugno, N., et al. (2015) · Nanoscale · doi:10.1039/c4nr01600a · Cited by 3,027
Highly active hydrogen evolution catalysis from metallic WS 2 nanosheets
Lukowski, M. A., Daniel, A. S., English, C. R., Meng, F., Forticaux, A., Hamers, R. J., & Jin, S. (2014) · Energy Environ. Sci. · doi:10.1039/c4ee01329h · Cited by 709
Nanostructured transition metal sulfides for lithium ion batteries: Progress and challenges
Xu, X., Liu, W., Kim, Y., & Cho, J. (2014) · Nano Today · doi:10.1016/j.nantod.2014.09.005 · Cited by 614
Zhao, Y., Wang, L. P., Sougrati, M. T., Feng, Z., Leconte, Y., Fisher, A., Srinivasan, M., & Xu, Z. (2017) · Advanced Energy Materials · doi:10.1002/aenm.201601424 · Cited by 586
Metadata
- Authors
- Bhandavat, R., David, L., & Singh, G.
- Venue
- The Journal of Physical Chemistry Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2012-05-22
- Volume
- 3
- Issue
- 11
- Pages
- 1523-1530
- ISSN
- 1948-7185 (ISSN-L)
- OpenAlex
- W2330162658
- Cited by
- 385
- References
- 0
- FWCI
- 20.55
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- Bhandavat, R., David, L., & Singh, G. (2012). Synthesis of Surface-Functionalized WS2 Nanosheets and Performance as Li-Ion Battery Anodes. The Journal of Physical Chemistry Letters. https://doi.org/10.1021/jz300480w
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