Work

Room Temperature Fabrication of Binder‐Free Na 3 V 2 (PO 4 ) 3 /C High‐Loading Electrode Films via the Powder Aerosol Deposition Method

Year: 2026

Type: article

Abstract: The powder aerosol deposition (PAD or aerosol deposition method [ADM]) and tape casting were used to manufacture Na 3 V 2 (PO 4 ) 3 /C (NVP/C) electrodes from the same synthesized powder batch. We demonstrate that Na‐based, binder‐free and solvent‐free thick PAD electrodes can be directly deposited onto aluminum current collectors. Tape‐cast electrodes were fabricated on aluminum foil to serve as a reference for electrochemical benchmarking. Galvanostatic cycling was performed at a C‐rate of C/10 between 1.5–4.5 and 2–4 V versus Na + /Na using a liquid electrolyte in coin cells. PAD electrodes with varying cathode active material (CAM) loadings were produced to evaluate the effect of loading and posttreatment on the electrochemical performance. While tape‐cast electrodes show consistent capacities (∼90 mAh g −1 at C/10), PAD electrodes delivered significantly lower specific capacities depending on CAM loading and posttreatment. By correlating delivered charge with active mass and thickness, we show that the charge extracted from PAD‐NVP/C cathode exhibit a plateau at ∼0.15–0.18 mAh, independent of CAM loading. This indicates that only a thin fraction of surface region participates in de/‐intercalation. These findings reveal the utilization limits in thick PAD cathodes and provide insight toward enabling their future industrialization.

Source: Batteries & Supercaps

DOI: 10.1002/batt.202500902

Authors: Mutlucan Sozak, Sofie Knies, Matteo Bianchini, Ralf Moos

Institution: University of Bayreuth

Language: English

Topic: Advancements in Battery Materials

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $4,030