Surface Modification of La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ) Cathode by Atomic Layer Deposition of La_(0.6)Sr_(0.4)CoO_(3-δ) for High-Performance Solid Oxide Fuel Cells

摘要

Surface modification of La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ) (LSCF) was conducted by atomic layer deposition (ALD) with La_(0.6)Sr_(0.4)CoO_(3-δ)(LSC). The anode supported cell with JJ3C modified LSCF cathode was used to analyze the effect of ALD LSC treatment. At the cell operating temperature (600°C) with the cell voltage of 550 mV, ALD treated cell has power density of 206.6 mW cm~(-2) and showed increase in performance by 15.8 mW cm~(-2) compared to bare cell By analyzing the impedance results, it was found that both adsorption (or surface diffusion) and charge transfer kinetics were enhanced after ALD surface modification.