Pillared vanadium molybdenum disulfide nanosheets: towards high-performance cathodes for magnesium-ion batteries

Jing, P., Stevenson, S., Lu, H., Ren, P., Abrahams, I. and Gregory, D. H. (2023) Pillared vanadium molybdenum disulfide nanosheets: towards high-performance cathodes for magnesium-ion batteries. ACS Applied Materials and Interfaces, 15(44), pp. 51036-51049. (doi: 10.1021/acsami.3c10287) (PMID:37874903) (PMCID:PMC10636724)

Abstract

If magnesium-ion batteries (MIBs) are to be seriously considered for next-generation energy storage, then a number of major obstacles need to be overcome. The lack of reversible cathode materials with sufficient capacity and cycle life is one of these challenges. Here, we report a new MIB cathode constructed of vertically stacked vanadium molybdenum sulfide (VMS) nanosheets toward addressing this challenge. The integration of vanadium within molybdenum sulfide nanostructures acts so as to improve the total conductivity, enhancing charge transfer, and to produce abundant lattice defects, improving both the accommodation and transport of Mg2+. Additionally, electrolyte additive-induced interlayer expansion provides a means to admit Mg2+ cations into the electrode structure and thus enhance their diffusion. The VMS nanosheets are capable of exhibiting capacities of 211.3 and 128.2 mA h g–1 at current densities of 100 and 1000 mA g–1, respectively. The VMS nanosheets also demonstrate long-term cycling stability, retaining 82.7% of the maximum capacity after 500 cycles at a current density of 1000 mA h g–1. These results suggest that VMS nanosheets could be promising candidates for high-performance cathodes in MIBs.

• Item Type: Articles
• Keywords: Magnesium ion batteries, cathode, vanadium molybdenum sulfide, electrolyte additives, interlayer expansion, nanosheets.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Stevenson, Dr Siobhan and Jing, Mr Pengcheng and Gregory, Professor Duncan
• Authors: Jing, P., Stevenson, S., Lu, H., Ren, P., Abrahams, I., and Gregory, D. H.
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: ACS Applied Materials and Interfaces
• Publisher: American Chemical Society
• ISSN: 1944-8244
• ISSN (Online): 1944-8252
• Published Online: 24 October 2023
• Copyright Holders: Copyright © 2023 The Authors
• First Published: First published in ACS Applied Materials and Interfaces 15(44):51036-51049
• Publisher Policy: Reproduced under a Creative Commons licence