Halogenated Ti3CMXenes with Electrochemically Active Terminals for High-Performance Zinc Ion Batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Mian Li
  • Guifang Qin
  • Kan Luo
  • Jun Lu
  • Youbing Li
  • Jie Zhou
  • Lars Hultman
  • Per Eklund
  • Per O. Å. Persson
  • Shiyu Du
  • Zhifang Chai
  • Qing Huang

Detail(s)

Original languageEnglish
Pages (from-to)1077−1085
Journal / PublicationACS Nano
Volume15
Issue number1
Online published8 Jan 2021
Publication statusPublished - 26 Jan 2021

Abstract

The class of two-dimensional metal carbides and nitrides known as MXenes offer a distinct manner of property tailoring for a wide range of applications. The ability to tune the surface chemistry for expanding the property space of MXenes is thus an important topic, although experimental exploration of surface terminals remains a challenge. Here, we synthesized Ti3C2 MXene with unitary, binary, and ternary halogen terminals, e.g., -Cl, -Br, -I, -BrI, and -ClBrI, to investigate the effect of surface chemistry on the properties of MXenes. The electrochemical activity of Br and I elements results in the extraordinary electrochemical performance of the MXenes as cathodes for aqueous zinc ion batteries. The -Br- and -I-containing MXenes, e.g., Ti3C2Br2 and Ti3C2I2, exhibit distinct discharge platforms with considerable capacities of 97.6 and 135 mAh·g-1. Ti3C2(BrI) and Ti3C2(ClBrI) exhibit dual discharge platforms with capacities of 117.2 and 106.7 mAh·g-1. In contrast, the previously discovered MXenes Ti3C2Cl2 and Ti3C2(OF) exhibit no discharge platforms and only ∼50% of capacities and energy densities of Ti3C2Br2. These results emphasize the effectiveness of the Lewis-acidic-melt etching route for tuning the surface chemistry of MXenes and also show promise for expanding the MXene family toward various applications.

Research Area(s)

  • electrochemical property, halogen, MXene, terminal, zinc ion batteries

Citation Format(s)

Halogenated Ti3CMXenes with Electrochemically Active Terminals for High-Performance Zinc Ion Batteries. / Li, Mian; Li, Xinliang; Qin, Guifang; Luo, Kan; Lu, Jun; Li, Youbing; Liang, Guojin; Huang, Zhaodong; Zhou, Jie; Hultman, Lars; Eklund, Per; Persson, Per O. Å.; Du, Shiyu; Chai, Zhifang; Zhi, Chunyi; Huang, Qing.

In: ACS Nano, Vol. 15, No. 1, 26.01.2021, p. 1077−1085.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review