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In Situ Investigation of Expansion during the Lithiation of Pillared MXenes with Ultralarge Interlayer Distance: The Journal of Physical Chemistry C

In Situ Investigation of Expansion during the Lithiation of Pillared MXenes with Ultralarge Interlayer Distance: The Journal of Physical Chemistry C
In Situ Investigation of Expansion during the Lithiation of Pillared MXenes with Ultralarge Interlayer Distance: The Journal of Physical Chemistry C

Pillared Ti 3C 2T zMXene with a large interlayer spacing (1.75 nm) is shown to be promising for high-power Li-ion batteries. Pillaring dramatically enhances the electrochemical performance, with superior capacities, rate capability, and cycling stability compared to the nonpillared material. In particular, at a high rate of 1 A g -1, the SiO 2-pillared MXene has a capacity over 4.2 times that of the nonpillared material. For the first time, we apply in situ electrochemical dilatometry to study the volume changes within the MXenes during (de)lithiation. The pillared MXene has superior performance despite larger volume changes compared to the nonpillared material. These results give key fundamental insights into the behavior of Ti 3C 2T zelectrodes in organic Li electrolytes and demonstrate that MXene electrodes should be designed to maximize interlayer spacings and that MXenes can tolerate significant initial expansions. After 10 cycles, both MXenes show nearly reversible thickness changes after the charge-discharge process, explaining the stable long-term electrochemical performance.

1932-7447
20791-20797
Maughan, Philip A.
3bdf4190-8639-40b1-a522-3ab0ca0cfc0c
Arnold, Stefanie
986f191e-1526-4bb5-8146-6b98cb9bf850
Zhang, Yuan
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Presser, Volker
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Tapia-Ruiz, Nuria
3983b001-dcd1-4780-8a5b-ec8e27b78e9b
Bimbo, Nuno
53d9fc24-e2c1-4e2d-8d75-8dc640d8adda
Maughan, Philip A.
3bdf4190-8639-40b1-a522-3ab0ca0cfc0c
Arnold, Stefanie
986f191e-1526-4bb5-8146-6b98cb9bf850
Zhang, Yuan
c4d8d3ee-9b75-42b7-bb14-035bbfa32c24
Presser, Volker
b7743f2f-a34a-4f48-a284-af18391b5040
Tapia-Ruiz, Nuria
3983b001-dcd1-4780-8a5b-ec8e27b78e9b
Bimbo, Nuno
53d9fc24-e2c1-4e2d-8d75-8dc640d8adda

Maughan, Philip A., Arnold, Stefanie, Zhang, Yuan, Presser, Volker, Tapia-Ruiz, Nuria and Bimbo, Nuno (2021) In Situ Investigation of Expansion during the Lithiation of Pillared MXenes with Ultralarge Interlayer Distance: The Journal of Physical Chemistry C. The Journal of Physical Chemistry C, 125 (38), 20791-20797. (doi:10.1021/acs.jpcc.1c05092).

Record type: Article

Abstract

Pillared Ti 3C 2T zMXene with a large interlayer spacing (1.75 nm) is shown to be promising for high-power Li-ion batteries. Pillaring dramatically enhances the electrochemical performance, with superior capacities, rate capability, and cycling stability compared to the nonpillared material. In particular, at a high rate of 1 A g -1, the SiO 2-pillared MXene has a capacity over 4.2 times that of the nonpillared material. For the first time, we apply in situ electrochemical dilatometry to study the volume changes within the MXenes during (de)lithiation. The pillared MXene has superior performance despite larger volume changes compared to the nonpillared material. These results give key fundamental insights into the behavior of Ti 3C 2T zelectrodes in organic Li electrolytes and demonstrate that MXene electrodes should be designed to maximize interlayer spacings and that MXenes can tolerate significant initial expansions. After 10 cycles, both MXenes show nearly reversible thickness changes after the charge-discharge process, explaining the stable long-term electrochemical performance.

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Maughan_et_al - Accepted Manuscript
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Published date: 30 September 2021
Additional Information: Funding Information: P.A.M. gratefully acknowledges support from the EPSRC Graphene NOWNANO Centre for Doctoral Training. The INM authors thank Eduard Arzt (INM) for his continued support. V.P. acknowledges funding of the MXene-CDI project (PR-1173/11) by the German Research Foundation (DFG, Deutsche Forschungsgemeinschaft). N.T.R. acknowledges the Royal Society (RG170150), Energy Lancaster and Lancaster University for financial support. Publisher Copyright: © 2021 American Chemical Society

Identifiers

Local EPrints ID: 451451
URI: http://eprints.soton.ac.uk/id/eprint/451451
ISSN: 1932-7447
PURE UUID: bcac20d4-7a35-4b63-a274-c1629cfbc0f4
ORCID for Nuno Bimbo: ORCID iD orcid.org/0000-0001-8740-8284

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Date deposited: 28 Sep 2021 16:35
Last modified: 06 Jun 2024 04:15

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Contributors

Author: Philip A. Maughan
Author: Stefanie Arnold
Author: Yuan Zhang
Author: Volker Presser
Author: Nuria Tapia-Ruiz
Author: Nuno Bimbo ORCID iD

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