The University of Southampton
University of Southampton Institutional Repository

In-situ pillared MXene as a viable zinc-ion hybrid capacitor

In-situ pillared MXene as a viable zinc-ion hybrid capacitor
In-situ pillared MXene as a viable zinc-ion hybrid capacitor
MXenes are recently discovered two-dimensional materials which have shown great promise in electrochemical energy storage. However, the majority of research has been on lithium and sodium systems, with little work done on multivalent ion systems, which have an urgent need for new electrode materials. In particular, zinc-ion aqueous systems have significant promise due to the widespread use of zinc batteries and the abundance (24th most abundant element on Earth), high specific capacity (>800 mAh g−1) and low toxicity of zinc. Only a few materials are reported to act as reversible zinc-ion hosts, hindering developments of this technology. In this work, we demonstrate for the first time that Ti3C2, the most studied MXene to date, can act as a reversible zinc-ion host for a hybrid capacitor using an aqueous zinc sulphate electrolyte. In addition, we report a novel in-situ pillaring method where CTAB is used to increase the Zn-ion uptake, with capacities up to 189 mAh g−1. A detailed mechanistic study that encompasses diffraction, microscopy and spectroscopy techniques was conducted to shed light on the structure and kinetics of the system. This understanding was used to optimise the electrode performance, resulting in outstanding cycling stability of over 96% over 1000 cycles. We believe this study will pave the pathway towards designing new pillared MXenes in low-cost Zn-ion aqueous systems.
Energy storage, MXenes, Zn-ion capacitors
0013-4686
Maughan, Philip A.
3bdf4190-8639-40b1-a522-3ab0ca0cfc0c
Tapia-Ruiz, Nuria
3983b001-dcd1-4780-8a5b-ec8e27b78e9b
Bimbo, Nuno
53d9fc24-e2c1-4e2d-8d75-8dc640d8adda
Maughan, Philip A.
3bdf4190-8639-40b1-a522-3ab0ca0cfc0c
Tapia-Ruiz, Nuria
3983b001-dcd1-4780-8a5b-ec8e27b78e9b
Bimbo, Nuno
53d9fc24-e2c1-4e2d-8d75-8dc640d8adda

Maughan, Philip A., Tapia-Ruiz, Nuria and Bimbo, Nuno (2020) In-situ pillared MXene as a viable zinc-ion hybrid capacitor. Electrochimica Acta, 341, [136061]. (doi:10.1016/j.electacta.2020.136061).

Record type: Article

Abstract

MXenes are recently discovered two-dimensional materials which have shown great promise in electrochemical energy storage. However, the majority of research has been on lithium and sodium systems, with little work done on multivalent ion systems, which have an urgent need for new electrode materials. In particular, zinc-ion aqueous systems have significant promise due to the widespread use of zinc batteries and the abundance (24th most abundant element on Earth), high specific capacity (>800 mAh g−1) and low toxicity of zinc. Only a few materials are reported to act as reversible zinc-ion hosts, hindering developments of this technology. In this work, we demonstrate for the first time that Ti3C2, the most studied MXene to date, can act as a reversible zinc-ion host for a hybrid capacitor using an aqueous zinc sulphate electrolyte. In addition, we report a novel in-situ pillaring method where CTAB is used to increase the Zn-ion uptake, with capacities up to 189 mAh g−1. A detailed mechanistic study that encompasses diffraction, microscopy and spectroscopy techniques was conducted to shed light on the structure and kinetics of the system. This understanding was used to optimise the electrode performance, resulting in outstanding cycling stability of over 96% over 1000 cycles. We believe this study will pave the pathway towards designing new pillared MXenes in low-cost Zn-ion aqueous systems.

Text
Author's Accepted Copy - Accepted Manuscript
Restricted to Repository staff only until 11 March 2022.
Request a copy

More information

Accepted/In Press date: 11 March 2020
e-pub ahead of print date: 12 March 2020
Keywords: Energy storage, MXenes, Zn-ion capacitors

Identifiers

Local EPrints ID: 439010
URI: http://eprints.soton.ac.uk/id/eprint/439010
ISSN: 0013-4686
PURE UUID: 8adecb42-a16f-4a45-bd81-e95f11d0bc5e
ORCID for Nuno Bimbo: ORCID iD orcid.org/0000-0001-8740-8284

Catalogue record

Date deposited: 31 Mar 2020 16:31
Last modified: 12 May 2021 02:03

Export record

Altmetrics

Contributors

Author: Philip A. Maughan
Author: Nuria Tapia-Ruiz
Author: Nuno Bimbo ORCID iD

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×