The DOI matches its Crossref record; 3 of the 3 references it cites were found in a registry or an index.
Understanding the MXene Pseudocapacitance
Open accessAbstract
MXenes have attracted great attention as next-generation capacitive energy-storage materials, but the mechanisms underlying their pseudocapacitive behavior are not well understood. Here we provide a theoretical description of the surface redox process of Ti 3 C 2 T x (T = O, OH), a prototypical MXene, in 1 M H 2 SO 4 electrolyte, based on joint density functional theory with an implicit solvation model and the analysis of Gibbs free energy under a constant-electrode potential. From the dependence of the O/OH ratio (or the surface H coverage) and the surface charge on the applied potential, we obtain a clear picture of the capacitive energy-storage mechanism of Ti 3 C 2 T x that shows good agreement with previous experimental findings in terms of the integral capacitance and Ti valence change. We find a voltage-dependent redox/double-layer co-charging behavior: the capacitive mechanism is dominated by the redox process, but the electric double-layer charge works against the redox process. This new insight may be useful in improving the capacitance of MXenes.
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Cites
Two-Dimensional Molybdenum Carbide (MXene) as an Efficient Electrocatalyst for Hydrogen Evolution
Seh, Z. W., Fredrickson, K. D., Anasori, B., Kibsgaard, J., Strickler, A. L., Lukatskaya, M. R., Gogotsi, Y., Jaramillo, T. F., & Vojvodic, A. (2016) · ACS Energy Letters · doi:10.1021/acsenergylett.6b00247 · Cited by 1,482
Self-citationXiao, H., Cheng, T., & Goddard, W. A. (2017) · Journal of the American Chemical Society · doi:10.1021/jacs.6b06846 · Cited by 458
Letchworth-Weaver, K., & Arias, T. A. (2012) · Physical Review B · doi:10.1103/physrevb.86.075140 · Cited by 351
Cited by
Pang, S.-Y., Wong, Y.-T., Yuan, S., Liu, Y., Tsang, M.-K., Yang, Z., Huang, H., Wong, W.-T., & Hao, J. (2019) · Journal of the American Chemical Society · doi:10.1021/jacs.9b02578 · Cited by 835
Emerging 2D MXenes for supercapacitors: status, challenges and prospects
Hu, M., Zhang, H., Hu, T., Fan, B., Wang, X., & Li, Z. (2020) · Chemical Society Reviews · doi:10.1039/d0cs00175a · Cited by 828
Synthesis, structure, properties and applications of MXenes: Current status and perspectives
Ronchi, R. M., Arantes, J. T., & Santos, S. F. (2019) · Ceramics International · doi:10.1016/j.ceramint.2019.06.114 · Cited by 698
3D MXene Architectures for Efficient Energy Storage and Conversion
Li, K., Liang, M., Wang, H., Wang, X., Huang, Y., Coelho, J., Pinilla, S., Zhang, Y., Qi, F., Nicolosi, V., et al. (2020) · Advanced Functional Materials · doi:10.1002/adfm.202000842 · Cited by 498
Rational Design of Flexible Two-Dimensional MXenes with Multiple Functionalities
Fu, Z., Wang, N., Legut, D., Si, C., Zhang, Q., Du, S., Germann, T. C., Francisco, J. S., & Zhang, R. (2019) · Chemical Reviews · doi:10.1021/acs.chemrev.9b00348 · Cited by 396
Metadata
- Authors
- Zhan, C., Naguib, M., Lukatskaya, M., Kent, P. R. C., Gogotsi, Y., & Jiang, D.-E.
- Venue
- The Journal of Physical Chemistry Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2018-02-20
- Volume
- 9
- Issue
- 6
- Pages
- 1223-1228
- ISSN
- 1948-7185 (ISSN-L)
- OpenAlex
- W2788841185
- Cited by
- 392
- References
- 3
- FWCI
- 10.48
- Type
- journal article
- Language
- en
- Open access
- green
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