Boosting the capacity of MXene electrodes in neutral aqueous electrolytes

Fyodor Malchik; Kairgali Maldybayev; Tatyana Kan; Saule Kokhmetova; Munseok S. Chae; Andrey Kurbatov; Alina Galeyeva; Olzhas Kaupbay; Amey Nimkar; Gil Bergman; Noam Levi; Hui Zhang; Qianqian Jin; Zifeng Lin; Netanel Shpigel; Daniel Mandler

doi:10.1016/j.xcrp.2023.101507

Boosting the capacity of MXene electrodes in neutral aqueous electrolytes

Fyodor Malchik, Kairgali Maldybayev, Tatyana Kan, Saule Kokhmetova, Munseok S. Chae, Andrey Kurbatov, Alina Galeyeva, Olzhas Kaupbay, Amey Nimkar, Gil Bergman, Noam Levi, Hui Zhang, Qianqian Jin, Zifeng Lin, Netanel Shpigel, Daniel Mandler

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

The use of Ti₃C₂T_x (MXene) electrodes for energy storage applications is gaining momentum. Considering the low flammability, high safety, and low cost of neutral aqueous electrolyte solutions, significant efforts have been devoted to the utilization of MXenes in this environment. However, despite the high stability and the excellent rate capability of MXene electrodes in neutral aqueous electrolytes, their capacity remains insufficient, usually below 30 mAh/g. This work aims to benefit from the spontaneous oxidation of MXene materials under ambient conditions to produce TiO₂-coated MXene flakes. By using concentrated lithium chloride solutions, an extended potential window is obtained, allowing reversible insertion of lithium ions into MXene flakes and titanium dioxide nanoparticles. This results in significant capacity enhancement in MXene electrodes (by more than 200%) without impeding the MXene capacitive activity or its mechanical integrity. The prepared electrode presents long-term stability and high rate capability.

Original language	English
Article number	101507
Journal	Cell Reports Physical Science
Volume	4
Issue number	7
DOIs	https://doi.org/10.1016/j.xcrp.2023.101507
State	Published - 19 Jul 2023

Bibliographical note

Publisher Copyright:
© 2023 The Authors

Funding

The authors thank Prof. Yury Gogotsi for his valuable comments. This research is funded by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan (grant no. AP09058354 ). N.S. acknowledges the Israel Academy of Sciences and Humanities for its financial support. Z.L. thanks the National Natural Science Foundation of China (grant no. 52072252 ) for financial support.

Funders	Funder number
National Natural Science Foundation of China	52072252
Israel Academy of Sciences and Humanities
Ministry of Education and Science of the Republic of Kazakhstan	AP09058354

Keywords

MXene
TiCT
TiO
aqueous electrolyte
hybrid batteries
supercapacitors
water in salt

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10.1016/j.xcrp.2023.101507

Cite this

Malchik, F., Maldybayev, K., Kan, T., Kokhmetova, S., Chae, M. S., Kurbatov, A., Galeyeva, A., Kaupbay, O., Nimkar, A., Bergman, G., Levi, N., Zhang, H., Jin, Q., Lin, Z., Shpigel, N., & Mandler, D. (2023). Boosting the capacity of MXene electrodes in neutral aqueous electrolytes. Cell Reports Physical Science, 4(7), Article 101507. https://doi.org/10.1016/j.xcrp.2023.101507

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abstract = "The use of Ti3C2Tx (MXene) electrodes for energy storage applications is gaining momentum. Considering the low flammability, high safety, and low cost of neutral aqueous electrolyte solutions, significant efforts have been devoted to the utilization of MXenes in this environment. However, despite the high stability and the excellent rate capability of MXene electrodes in neutral aqueous electrolytes, their capacity remains insufficient, usually below 30 mAh/g. This work aims to benefit from the spontaneous oxidation of MXene materials under ambient conditions to produce TiO2-coated MXene flakes. By using concentrated lithium chloride solutions, an extended potential window is obtained, allowing reversible insertion of lithium ions into MXene flakes and titanium dioxide nanoparticles. This results in significant capacity enhancement in MXene electrodes (by more than 200%) without impeding the MXene capacitive activity or its mechanical integrity. The prepared electrode presents long-term stability and high rate capability.",

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AU - Malchik, Fyodor

AU - Maldybayev, Kairgali

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AU - Kokhmetova, Saule

AU - Chae, Munseok S.

AU - Kurbatov, Andrey

AU - Galeyeva, Alina

AU - Kaupbay, Olzhas

AU - Nimkar, Amey

AU - Bergman, Gil

AU - Levi, Noam

AU - Zhang, Hui

AU - Jin, Qianqian

AU - Lin, Zifeng

AU - Shpigel, Netanel

AU - Mandler, Daniel

PY - 2023/7/19

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AB - The use of Ti3C2Tx (MXene) electrodes for energy storage applications is gaining momentum. Considering the low flammability, high safety, and low cost of neutral aqueous electrolyte solutions, significant efforts have been devoted to the utilization of MXenes in this environment. However, despite the high stability and the excellent rate capability of MXene electrodes in neutral aqueous electrolytes, their capacity remains insufficient, usually below 30 mAh/g. This work aims to benefit from the spontaneous oxidation of MXene materials under ambient conditions to produce TiO2-coated MXene flakes. By using concentrated lithium chloride solutions, an extended potential window is obtained, allowing reversible insertion of lithium ions into MXene flakes and titanium dioxide nanoparticles. This results in significant capacity enhancement in MXene electrodes (by more than 200%) without impeding the MXene capacitive activity or its mechanical integrity. The prepared electrode presents long-term stability and high rate capability.

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Boosting the capacity of MXene electrodes in neutral aqueous electrolytes

Abstract

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Keywords

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