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 language | English |
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Article number | e202218343 |
Journal | Angewandte Chemie - International Edition |
Volume | 62 |
Issue number | 8 |
DOIs | |
Publication status | Published - 13 Feb 2023 |
Keywords
- 2D Heterostructures
- Metal–Organic Frameworks
- MXenes
- Zinc-Ion Batteries
ASJC Scopus subject areas
- Catalysis
- General Chemistry