Issue 32, 2023

Covalent netting restrains dissolution enabling stable high-loading and high-rate iron difluoride cathodes

Abstract

Metal fluoride conversion cathodes are promising for the production of cheap, sustainable, and high-energy lithium-ion batteries. Yet, such systems are plagued by active material dissolution that causes capacity fade and hinders commercialization. Here, a covalent netting strategy is proposed to overcome this hurdle. In a proof-of-concept design, polydopamine derived carbon-mediated covalent binding inhibited the dissolution, while the pyrolyzed bacterial cellulose netting structure furnished fast electronic and ionic transport pathways. We demonstrate high-capacity, high-rate and long-lasting stability attained at practical loading levels. Our investigations suggest that the covalent netting-enabled formation of a robust and efficient blocking layer, highly competent in suppressing the leaching, is key for a stable performance. The successful stabilization of metal difluorides in the absence of electrolyte engineering opens an avenue for their practical deployment in future higher-level but lower-cost batteries, and provides a solution to similar challenges encountered by other dissolving energy electrode materials.

Graphical abstract: Covalent netting restrains dissolution enabling stable high-loading and high-rate iron difluoride cathodes

Supplementary files

Article information

Article type
Paper
Submitted
10 мај 2023
Accepted
14 јул. 2023
First published
01 авг. 2023

Nanoscale, 2023,15, 13272-13279

Covalent netting restrains dissolution enabling stable high-loading and high-rate iron difluoride cathodes

W. Xu, Y. Ma, D. Wang, S. Zhang, M. Hamza, L. Zhi, L. Li and X. Li, Nanoscale, 2023, 15, 13272 DOI: 10.1039/D3NR02161K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements