LSCF (64 wt%) Electrode Slurry for SOFC/SOEC, 100 g/bottle, CSOFECESLSCF
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In the production of Solid Oxide Fuel Cells (SOFC) and Electrolysis Cells (SOEC), an LSCF (Lanthanum Strontium Cobalt Ferrite) slurry is the liquid suspension used to deposit the oxygen electrode. Since LSCF is a Mixed Ionic-Electronic Conductor (MIEC), the slurry is often formulated as a composite with GDC (Gadolinium-Doped Ceria) to further enhance ionic transport and match the thermal expansion of the electrolyte. LSCF slurries are highly sensitive to processing temperatures; firing too high can lead to the formation of insulating phases, while firing too low results in poor adhesion.
A professional LSCF slurry (or ink) is designed to create a layer with 30% to 40% porosity to allow for gas diffusion (O2 capture in SOFC mode, O2 escape in SOEC mode).
It is a critical manufacturing rule that LSCF slurries must not be printed directly onto a YSZ electrolyte. (1) Chemical Reaction: At sintering temperatures, Strontium (Sr) from the LSCF slurry will migrate into the YSZ to form Strontium Zirconate (SrZrO3) that is an electrical insulator. (2) The Solution: A separate, dense GDC slurry must be printed and fired first to act as a "barrier layer" (typically 3-5 um thick).
The slurry preparation highly depends on the coating techniques: (1) Screen-Printing Ink: This is the most common form for LSCF. It requires a high-viscosity, thixotropic paste (often using Terpineol). It must be homogenized using a three-roll mill to ensure the LSCF and GDC are perfectly distributed at the sub-micron level. (2) Tape Casting Slurry: Used for making "cathode-supported" cells. This requires a lower viscosity and a higher concentration of binders (like PVB) to allow the resulting "green" sheet to be flexible and handleable.
| Part Number |
CSOFECESLSCF (C-SOFEC-ES-LSCF) |
| Active Material |
LSCF La0.6Sr0.4Co0.2Fe0.8O3-δ Solid state content: 64 wt% |
| Package Grade |
100 g/bottle (other grades, such as 500 g, and 1000 g or larger can be supplied upon request) |
References:
- S. J. Kim, et al., Stability of LSCF electrode with GDC interlayer in YSZ-based solid oxide electrolysis cell, Solid State Ionics, 2014, 262, 303-306.
- E. N. Armstrong, et al., Determination of Surface Exchange Coefficients of LSM, LSCF, YSZ, GDC Constituent Materials in Composite SOFC Cathodes, J. Electrochem. Soc., 2011, 158, B492.
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V. Vibhu, et al., High Performance LSC Infiltrated LSCF Oxygen Electrode for High Temperature Steam Electrolysis Application, J. Electrochem. Soc., 2019, 166, F102.