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Water-based vs. organic solvent-based processing of NVP/C cathodes for sodium-ion batteries toward higher processing rates.

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Title: Water-based vs. organic solvent-based processing of NVP/C cathodes for sodium-ion batteries toward higher processing rates.
Authors: Burger, David1 (AUTHOR) david.burger@kit.edu, Sun, Hanqing1 (AUTHOR), Wu, Xuebin2 (AUTHOR), Keim, Noah2 (AUTHOR), Müller, Marcus2 (AUTHOR), Bauer, Werner2 (AUTHOR), Ehrenberg, Helmut2 (AUTHOR), Scharfer, Philip1 (AUTHOR), Schabel, Wilhelm1 (AUTHOR)
Source: Journal of Coatings Technology & Research. May2026, Vol. 23 Issue 3, p1159-1169. 11p.
Subjects: Sodium ion batteries, Organic solvents, Polar solvents, Coating processes
Abstract: Sodium-ion batteries are treated as a drop-in technology to complement lithium-ion batteries in applications such as entry-level cars and stationary storage. This study compares water-based processing of the sodium-ion battery active material sodium vanadium phosphate (NVP/C) with processing using slurries based on the organic solvent NMP. By utilizing CMC/SBR as a binder, the adhesion strength, flexibility, electrical resistance, and rate capability were improved. These superior properties could be maintained at increasing the drying rate by a factor of 8. However, electrodes processed with the water-based binder system also suffered from binder migration at higher drying rates. To enable high-throughput processing, a strategy involving simultaneous multilayer coating of a primer and electrode slurry was explored. This approach helped mitigate the negative effects of binder migration. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Sodium-ion batteries are treated as a drop-in technology to complement lithium-ion batteries in applications such as entry-level cars and stationary storage. This study compares water-based processing of the sodium-ion battery active material sodium vanadium phosphate (NVP/C) with processing using slurries based on the organic solvent NMP. By utilizing CMC/SBR as a binder, the adhesion strength, flexibility, electrical resistance, and rate capability were improved. These superior properties could be maintained at increasing the drying rate by a factor of 8. However, electrodes processed with the water-based binder system also suffered from binder migration at higher drying rates. To enable high-throughput processing, a strategy involving simultaneous multilayer coating of a primer and electrode slurry was explored. This approach helped mitigate the negative effects of binder migration. [ABSTRACT FROM AUTHOR]
ISSN:19459645
DOI:10.1007/s11998-025-01231-3