Aerosol-assisted chemical vapor deposition of V2O5 cathodes with high rate capabilities for magnesium-ion batteries

Abstract

The growth of orthorhombic vanadium pentoxide nanostructures was accomplished using an aerosol-assisted chemical vapor deposition process. These materials showed excellent electrochemical performance for magnesium-ion storage in an aqueous electrolyte; showing specific discharge capacities of up to 427 mAh g-1 with a capacity retention of 82 % after 2000 scans under a high specific current of 5.9 A g-1. The high rate capability suggested good structural stability and high reversibility. We believe the development of low-cost and largearea coating methods, such as the technique used herein, will be essential for the upscalable fabrication of next-generation rechargeable battery technologies.

Vanadium‐Based Nanomaterials: A Promising Family for Emerging Metal‐Ion Batteries

“…Thus, the water content in electrolyte will greatly influence the Mg 2+ storage performance of V 2 O 5 . For example, when the water content is infinite, that is in aqueous electrolyte (such as aqueous MgCl 2 solution), a high magnesium storage capacity of 427 mAh g −1 was demonstrated for V 2 O 5 . Sa et al investigated the magnesium storage performance of V 2 O 5 in the 1 m magnesium bis(trifluoromethane sulfonyl)imide (Mg(TFSI) 2 )/diglyme electrolyte with different water content.…”

“…For example, when the water content is infinite, that is in aqueous electrolyte (such as aqueous MgCl 2 solution), a high magnesium storage capacity of 427 mAh g −1 was demonstrated for V 2 O 5 . [111] Sa et al [83] investigated the magnesium storage performance of V 2 O 5 in the 1 m magnesium bis(trifluoromethane sulfonyl)imide (Mg(TFSI) 2 )/diglyme electrolyte with different water content. With 2600 ppm water in electrolyte, the V 2 O 5 cathode achieved a high capacity of ≈260 mAh g −1 (Figure 5a).…”

V2O5 as magnesium cathode material with extended cyclic stability

“…In this work, we demonstrate that a mixed phase of α-V 2 O 5 and β-V 2 O 5 deposited at 600 °C (i.e. higher substrate temperature than before [7]) is capable of reversibly inserting magnesium ions showing a specific discharge capacity of 300 mAh g -1 with capacity retention of 92 % after 10000 scans, which may be a combination of electrode morphology and adherence. This particular cathode offers a safe and economical energy storage solution to large-scale applications with extended cyclic stability.…”

“…In our previous work [7], the viability of a technology that is proven to be industrially competitive -that of cold-wall aerosol assisted chemical vapor deposition was established for the growth of vanadium pentoxide (V 2 O 5 ) with excellent performance as cathodes for aqueous magnesium-ion batteries (specific discharge capacity 427 mA h g -1 with capacity retention of 82 % after 2000 scans). The cathodes presented an increase of current intensity as the scan number proceeded to 500, remaining however unchanged after 1000 scans.…”

Atomic layer deposited V2O5 coatings: a promising cathode for Li-ion batteries

“…Electrochemical evaluation of the samples was performed in a three-electrode cell as reported previously [19][20][21][22] using 0.001 mol cm -3 LiCl aqueous solution as an electrolyte for 10000 continuous Li + intercalation/deintercalation scans at 10 mV s -1 . The counter electrode was Pt, the working electrode was ALD V 2 O 5 and all potential values were taken with respect to a standard Ag/AgCl reference electrode.…”