Issue 7, 2024

Zeolitic imidazolate framework/Prussian blue analogue derived CoSe2/FeSe2 heterostructure for long-cycle aluminum-ion batteries

Abstract

Aluminum-ion batteries (AIBs) have been considered a low-cost, safe and high energy density candidate for large-scale electrochemical energy storage systems. Here, we utilize the concept of interface engineering to synthesize a CoSe2/FeSe2 heterostructure cathode through MOF-on-MOF heteroepitaxial growth. The presence of an internal electric field between the CoSe2 and FeSe2 phases induces a synergistic effect to achieve rapid charge transfer and ion diffusion, which enables a facile conversion reaction based on Co2+/Co0 and Fe2+/Fe0. The CoSe2/FeSe2 heterostructure displays an initial discharge capacity of 356.9 mA h g−1 at 100 mA g−1. After 1600 cycles at 200 mA g−1, the reversible capacity is 133.7 mA g−1. Theoretical calculation also demonstrates that the designed CoSe2/FeSe2 heterostructure can significantly promote the directional electron transfer and reduce the aluminum-ion migration barrier energy. Therefore, the concept of heterostructure cathodes provides a strategy to develop long-cycle life AIBs.

Graphical abstract: Zeolitic imidazolate framework/Prussian blue analogue derived CoSe2/FeSe2 heterostructure for long-cycle aluminum-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
03 Nov 2023
Accepted
08 Jan 2024
First published
09 Jan 2024

J. Mater. Chem. A, 2024,12, 4138-4145

Zeolitic imidazolate framework/Prussian blue analogue derived CoSe2/FeSe2 heterostructure for long-cycle aluminum-ion batteries

T. Liu, M. Liu, J. Guo, C. Zhao, H. Liu, X. Li, L. Liao and G. Lv, J. Mater. Chem. A, 2024, 12, 4138 DOI: 10.1039/D3TA06734C

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