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

^*Corresponding author for this work

Institute 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

Keywords

MXene
TiCT
TiO
aqueous electrolyte
hybrid batteries
supercapacitors
water in salt

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10.1016/j.xcrp.2023.101507

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

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doi = "10.1016/j.xcrp.2023.101507",

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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

Y1 - 2023/7/19

N2 - 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.

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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KW - TiCT

KW - TiO

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KW - hybrid batteries

KW - supercapacitors

KW - water in salt

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Boosting the capacity of MXene electrodes in neutral aqueous electrolytes

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