Constructing 2D Sandwich-like MOF/MXene Heterostructures for Durable and Fast Aqueous Zinc-Ion Batteries

Yalei Wang, Jun Song (Corresponding Author), Wai Yeung Wong (Corresponding Author)

Research output: Journal article publicationJournal articleAcademic researchpeer-review

90 Citations (Scopus)

Abstract

Two-dimensional metal–organic frameworks (2D MOFs) can be used as the cathodes for high-performance zinc-ion battery due to their large one-dimensional channels. However, the conventionally poor electrical conductivity and low structural stability hinder their advances. Herein, we report an alternately stacked MOF/MX heterostructure, exhibiting the 2D sandwich-like structure with abundant active sites, improved electrical conductivity and exceptional structural stability. Ex situ characterizations and theoretical calculations reveal a reversible intercalation mechanism of zinc ions and high electrical conductivity in the 2D heterostructure. Electrochemical tests confirm excellent Zn2+ migration kinetics and ideal pseudocapacitive behaviors. As a consequence, Cu-HHTP/MX shows a superior rate performance (260.1 mAh g−1 at 0.1 A g−1 and 173.1 mAh g−1 at 4 A g−1) and long-term cycling stability of 92.5 % capacity retention over 1000 cycles at 4 A g−1.

Original languageEnglish
Article numbere202218343
JournalAngewandte Chemie - International Edition
Volume62
Issue number8
DOIs
Publication statusPublished - 13 Feb 2023

Keywords

  • 2D Heterostructures
  • Metal–Organic Frameworks
  • MXenes
  • Zinc-Ion Batteries

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry

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