Description
Key Properties & Advantages
This LSCF6428 cathode current collector slurry balances high-performance electrochemistry with versatile processability:
High Solids Content (60–75%): Enables thick or thin film deposition in minimal coats, ensuring a dense, conductive layer after sintering—critical for efficient current collection and oxygen reduction reaction (ORR) activity.
Fine Fineness (<5 μm): Ensures uniform dispersion of LSCF6428 particles, preventing agglomerates that could disrupt electron flow or block oxygen diffusion. The sub-5 μm size promotes intimate contact with cathode substrates (e.g., LSCF active layers, GDC electrolytes).
Dual-Viscosity Options:
3000–4500 cP: Optimized for screen printing or doctor blading, ensuring controlled flow for thick films (10–30 μm) without sagging.
600–1500 cP: Ideal for spray coating or dip coating, enabling smooth, thin films (5–15 μm) with uniform coverage.
Exceptional Conductivity: LSCF6428’s intrinsic mixed ionic-electronic conductivity (MIEC) ensures efficient electron transport and oxygen ion diffusion, enhancing ORR activity at 600–800°C.
Thermal & Chemical Stability: Retains performance in oxidizing atmospheres (air) at 600–800°C, with compatibility with common SOFC cathode materials (pure LSCF, LSCF-GDC composites) and electrolytes (GDC, YSZ).
Strong Adhesion: Formulated with a high-temperature binder system that burns out cleanly during sintering, leaving a porous yet robust LSCF6428 layer that withstands thermal cycling without delamination.
Core Applications
SOFC Air Electrode (Cathode) Current Collection
This LSCF6428 slurry is a critical component in SOFC cathode design, optimizing current collection in air electrodes:
Cathode Current Collector Layers: Applied as a conductive coating on cathode active layers, it forms a low-resistance pathway between the cathode and SOFC interconnects, reducing contact resistance and improving ORR efficiency.
Thick-Film Cathode Structures: Ideal for cathode-supported or planar SOFCs, where the high solids content and 3000–4500 cP viscosity enable the formation of robust collector layers that ensure uniform current distribution across large-area air electrodes.
Thin-Film Coatings: The 600–1500 cP formulation suits spray coating of thin collector layers, enhancing surface coverage on complex cathode geometries while maintaining porosity for oxygen diffusion.
Other High-Temperature Electrochemical Devices
Oxygen Sensors & Membranes: Used as a conductive layer in high-temperature oxygen sensors or oxygen separation membranes, leveraging LSCF6428’s sensitivity to oxygen partial pressure and conductivity.
Its active component is high-purity LSCF6428 (La₀.₆Sr₀.₄Co₀.₂Fe₀.₈O₃₋δ), with a solids content of 60–75 wt.% (including LSCF6428 and binder system). The fineness (maximum particle size, laser diffraction method) is <5 μm, and the viscosity options are 3000–4500 cP or 600–1500 cP (measured at 25°C using the Brookfield method). The binder system is a high-temperature organic binder (burns out completely at 400–600°C), the color is a black to dark gray slurry, and the sintering temperature is 1000–1150°C in air.
For research and industrial use only.
