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Binder-free anodes for potassium-ion batteries comprising antimony nanoparticles on carbon nanotubes obtained using electrophoretic deposition
Date
2024
Abstract
Antimony has a high theoretical capacity and suitable alloying/dealloying potentials to make it a future anode for potassium-ion batteries (PIBs); however, substantial volumetric changes, severe pulverization, and active mass delamination from the Cu foil during potassiation/depotassiation need to be overcome. Herein, we present the use of electrophoretic deposition (EPD) to fabricate binder-free electrodes consisting of Sb nanoparticles (NPs) embedded in interconnected multiwalled carbon nanotubes (MWCNTs). The anode architecture allows volume changes to be accommodated and prevents Sb delamination within the binder-free electrodes. The Sb mass ratio of the Sb/CNT nanocomposites was varied, with the optimized Sb/CNT nanocomposite delivering a high reversible capacity of 341.30 mA h g−1 (∼90% of the initial charge capacity) after 300 cycles at C/5 and 185.69 mA h g−1 after 300 cycles at 1C. Postcycling investigations reveal that the stable performance is due to the unique Sb/CNT nanocomposite structure, which can be retained over extended cycling, protecting Sb NPs from volume changes and retaining the integrity of the electrode. Our findings not only suggest a facile fabrication method for high-performance alloy-based anodes in PIBs but also encourage the development of alloying-based anodes for next-generation PIBs.
Supervisor
Description
Publisher
American Chemical Society
Citation
ACS Appl. Mater. Interfaces 2024, 16, 27, 34809–34818
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Pham_2024_Binder-Free.pdf
Adobe PDF, 6.43 MB
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Funding Information
X-M.P. would like to thank the Irish Research Council (IRC) under Grant Number IRCLA/2017/285. K.M.R. acknowledges Science Foundation Ireland (SFI) under the Principal Investigator Program under contract no. 16/IA/4629 and under grant no. SFI 16/MERA/3419. N.N.P. and S.S. acknowledge the funding and support from the Department of Chemical Sciences, University of Limerick. S.A.A. and H.G. acknowledge support from Science Foundation Ireland under grant no. 18/SIRG/5484. The authors would also like to thank Dr. Fathima Laffir (XPS instrument scientist − Bernal Institute) for help with XPS analysis. For the purpose of Open Access, the author has applied a CC BY public copyright licence to any Author Accepted Manuscript version arising from this.