Publication detail

Multifunctional Molecule-Grafted V2C MXene as High-Kinetics Potassium-Ion-Intercalation Anodes for Dual-Ion Energy Storage Devices

SABAGHI, D. POLČÁK, J. YANG, H. LI, X. MORAG, A. LI, D. NIA, A. S. KHOSRAVI, S. H. ŠIKOLA, T. FENG, X. YU, M.

Original Title

Multifunctional Molecule-Grafted V2C MXene as High-Kinetics Potassium-Ion-Intercalation Anodes for Dual-Ion Energy Storage Devices

Type

journal article in Web of Science

Language

English

Original Abstract

Constructing dual-ion energy storage devices using anion-intercalation graphite cathodes offers the unique opportunity to simultaneously achieve high energy density and output power density. However, a critical challenge remains in the lack of proper anodes that match with graphite cathodes, particularly in sustainable electrolyte systems using abundant potassium. Here, a surface grafting approach utilizing multifunctional azobenzene sulfonic acid is reported, which transforms V2C MXene into a high-kinetics K+-intercalation anode (denoted ASA-V2C) for dual-ion energy storage devices. Importantly, the grafted azobenzene sulfonic acid offers extra K+-storage centers and fast K+-hopping sites, while concurrently acting as a buffer between V2C layers to mitigate the structural distortion during K+ intercalation/de-intercalation. These functionalities enable the V2C electrode with significantly enhanced specific capacity (173.9 mAh g(-1) vs 121.5 mAh g(-1) at 0.05 A g(-1)), rate capability (43.1% vs 12.0% at 20 A g(-1)), and cycling stability (80.3% vs 45.2% after 900 cycles at 0.05 A g(-1)). When coupled with an anion-intercalation graphite cathode, the ASA-V2C anode demonstrates its potential in a dual-ion energy storage device. Notably, the device depicts a maximum energy density of 175 Wh kg(-1) and a supercapacitor-comparable power density of 6.5 kW kg(-1), outperforming recently reported Li+-, Na+-, and K+-based dual-ion devices.

Keywords

anode; dual-ion energy storage; MXenes; potassium-ion intercalation; surface grafting

Authors

SABAGHI, D.; POLČÁK, J.; YANG, H.; LI, X.; MORAG, A.; LI, D.; NIA, A. S.; KHOSRAVI, S. H.; ŠIKOLA, T.; FENG, X.; YU, M.

Released

27. 11. 2023

Publisher

WILEY-V C H VERLAG GMBH

Location

WEINHEIM

ISBN

1614-6840

Periodical

Advanced Energy Materials

Year of study

14

Number

3

State

Federal Republic of Germany

Pages from

2302961

Pages to

2302969

Pages count

9

URL

https://doi.org/10.1002/aenm.202302961

BibTex

@article{BUT187347,
  author="SABAGHI, D. and POLČÁK, J. and YANG, H. and LI, X. and MORAG, A. and LI, D. and NIA, A. S. and KHOSRAVI, S. H. and ŠIKOLA, T. and FENG, X. and YU, M.",
  title="Multifunctional Molecule-Grafted V2C MXene as High-Kinetics Potassium-Ion-Intercalation Anodes for Dual-Ion Energy Storage Devices",
  journal="Advanced Energy Materials",
  year="2023",
  volume="14",
  number="3",
  pages="9",
  doi="10.1002/aenm.202302961",
  issn="1614-6840",
  url="https://doi.org/10.1002/aenm.202302961"
}