Publication detail

MXenes with ordered triatomic-layer borate polyanion terminations

LI, D. ZHENG, W. GALI, S. M. SOBCZAK, K. HORÁK, M. POLČÁK, J. LOPATIK, N. LI, Z. ZHANG, J. SABAGHI, D. ZHOU, S. MICHAŁOWSKI, P. P. ZSCHECH, E. BRUNNER, E. DONTEN, M. ŠIKOLA, T. BONN, M. WANG, H. I. BELJONNE, D. YU, M. FENG, X.

Original Title

MXenes with ordered triatomic-layer borate polyanion terminations

Type

journal article in Web of Science

Language

English

Original Abstract

Surface terminations profoundly influence the intrinsic properties of MXenes, but existing terminations are limited to monoatomic layers or simple groups, showing disordered arrangements and inferior stability. Here we present the synthesis of MXenes with triatomic-layer borate polyanion terminations (OBO terminations) through a flux-assisted eutectic molten etching approach. During the synthesis, Lewis acidic salts act as the etching agent to obtain the MXene backbone, while borax generates BO2- species, which cap the MXene surface with an O-B-O configuration. In contrast to conventional chlorine/oxygen-terminated Nb2C with localized charge transport, OBO-terminated Nb2C features band transport described by the Drude model, exhibiting a 15-fold increase in electrical conductivity and a 10-fold improvement in charge mobility at the d.c. limit. This transition is attributed to surface ordering that effectively mitigates charge carrier backscattering and trapping. Additionally, OBO terminations provide Ti3C2 MXene with substantially enriched Li+-hosting sites and thereby a large charge-storage capacity of 420 mAh g-1. Our findings illustrate the potential of intricate termination configurations in MXenes and their applications for (opto)electronics and energy storage. MXenes with borate polyanion terminations are synthesized using a flux-assisted eutectic molten etching approach. These triatomic-layer terminations empower MXenes with considerably improved charge transport and charge storage capabilities.

Keywords

ELASTIC BAND METHOD; ENERGY; TRANSPORT; CARBIDE

Authors

LI, D.; ZHENG, W.; GALI, S. M.; SOBCZAK, K.; HORÁK, M.; POLČÁK, J.; LOPATIK, N.; LI, Z.; ZHANG, J.; SABAGHI, D.; ZHOU, S.; MICHAŁOWSKI, P. P.; ZSCHECH, E.; BRUNNER, E.; DONTEN, M.; ŠIKOLA, T.; BONN, M.; WANG, H. I.; BELJONNE, D.; YU, M.; FENG, X.;

Released

7. 6. 2024

Publisher

NATURE PORTFOLIO

Location

BERLIN

ISBN

1476-4660

Periodical

Nature Materials

Year of study

23

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages count

11

URL

https://www.nature.com/articles/s41563-024-01911-2

BibTex

@article{BUT188884,
  author="LI, D. and ZHENG, W. and GALI, S. M. and SOBCZAK, K. and HORÁK, M. and POLČÁK, J. and LOPATIK, N. and LI, Z. and ZHANG, J. and SABAGHI, D. and ZHOU, S. and MICHAŁOWSKI, P. P. and ZSCHECH, E. and BRUNNER, E. and DONTEN, M. and ŠIKOLA, T. and BONN, M. and WANG, H. I. and BELJONNE, D. and YU, M. and FENG, X.",
  title="MXenes with ordered triatomic-layer borate polyanion terminations",
  journal="Nature Materials",
  year="2024",
  volume="23",
  number="1",
  pages="11",
  doi="10.1038/s41563-024-01911-2",
  issn="1476-4660",
  url="https://www.nature.com/articles/s41563-024-01911-2"
}