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Effect of Postetch Annealing Gas Composition on the Structural and Electrochemical Properties of Ti2CTx MXene Electrodes for Supercapacitor Applications
Abstract
Two-dimensional Ti 2 CT x MXene nanosheets were prepared by the selective etching of Al layer from Ti 2 AlC MAX phase using HF treatment. The MXene sheets retained the hexagonal symmetry of the parent Ti 2 AlC MAX phase. Effect of the postetch annealing ambient (Ar, N 2, N 2 /H 2, and air) on the structure and electrochemical properties of the MXene nanosheets was investigated in detail. After annealing in air, the MXene sheets exhibited variations in structure, morphology, and electrochemical properties as compared to HF treated MAX phase. In contrast, samples annealed in Ar, N 2, and N 2 /H 2 ambient retained their original morphology. However, a significant improvement in the supercapacitor performance is observed upon heat treatment in Ar, N 2, and N 2 /H 2 ambients. When used in symmetric two-electrode configuration, the MXene sample annealed in N 2 /H 2 atmosphere exhibited the best capacitive performance with specific capacitance value (51 F/g at 1A/g) and high rate performance (86%). This improvement in the electrochemical performance of annealed samples is attributed to highest carbon content, and lowest fluorine content on the surface of the sample upon annealing, while retaining the original two-dimensional layered morphology and providing maximum access of aqueous electrolyte to the electrodes.
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Citations
Cites
Synthesis and thermal stability of two-dimensional carbide MXene Ti3C2
Li, Z., Wang, L., Sun, D., Zhang, Y., Liu, B., Hu, Q., & Zhou, A. (2015) · Materials Science and Engineering: B · doi:10.1016/j.mseb.2014.10.009 · Cited by 928
Cited by
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
Recent Advances in Oxidation Stable Chemistry of 2D MXenes
Cao, F., Zhang, Y., Wang, H., Khan, K., Tareen, A. K., Qian, W., Zhang, H., & Ågren, H. (2022) · Advanced Materials · doi:10.1002/adma.202107554 · Cited by 648
Two-Dimensional Ti3C2Tx MXene Nanosheets for Efficient Copper Removal from Water
Shahzad, A., Rasool, K., Miran, W., Nawaz, M., Jang, J., Mahmoud, K. A., & Lee, D. S. (2017) · ACS Sustainable Chemistry & Engineering · doi:10.1021/acssuschemeng.7b02695 · Cited by 478
Fabrication and thermal stability of two-dimensional carbide Ti3C2 nanosheets
Wang, K., Zhou, Y., Xu, W., Huang, D., Wang, Z., & Hong, M. (2016) · Ceramics International · doi:10.1016/j.ceramint.2016.02.059 · Cited by 409
Pan, Z., Cao, F., Hu, X., & Ji, X. (2019) · Journal of Materials Chemistry A · doi:10.1039/c9ta00085b · Cited by 398
Metadata
- Authors
- Rakhi, R. B., Ahmed, B., Hedhili, M. N., Anjum, D. H., & Alshareef, H. N.
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-07-23
- Volume
- 27
- Issue
- 15
- Pages
- 5314-5323
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W2261680338
- Cited by
- 981
- References
- 1
- FWCI
- 21.58
- Type
- journal article
- Language
- en
- Open access
- closed
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- Rakhi, R. B., Ahmed, B., Hedhili, M. N., Anjum, D. H., & Alshareef, H. N. (2015). Effect of Postetch Annealing Gas Composition on the Structural and Electrochemical Properties of Ti2CTx MXene Electrodes for Supercapacitor Applications. Chemistry of Materials. https://doi.org/10.1021/acs.chemmater.5b01623
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