DOUBLE-LAYER ACTIVE ELECTRODE FOR ELECTROCHEMICAL DEVICES USING SOLID ELECTROLYTE Russian patent published in 2008 - IPC H01M4/48 H01M8/10 

FIELD: high-temperature electrochemistry and electrochemical power engineering.

SUBSTANCE: introduced in first layer of double-layer active electrode used for electrochemical devices filled with solid electrolyte incorporating mixture of powdered La_{1 - x}Sr_xFe_{1 - y}CO_yO₃ and doped with CeO₂ is nanometric powder CuO and/or Cu₂O; CeO₂ doped with samarium or gadolinium, proportion of ingredients being as follows, mass percent: La_1-xSr_xFe_0.8CO_0.2O₃ (x = 0.2-0.4), 69.5-36; Ce_{1 - x}Sm_xO_{2 - δ} (x - 0.1-0.2), 30-60; CuO and/or Cu₂O, 0.5-4. Second layer is made of mixture of powdered La_2-xSr_xMnO₃ (x = 0.2-0.4) and copper oxides (CuO and Cu₂O) in amount of 9.7-99.5 and 0.5-3 mass percent, respectively. Nanometric powder of PrO_{2 - δ} in amount of 5-10 mass percent is uniformly distributed in both electrode layers.

EFFECT: reduced polarization resistance, enhanced electric conductivity, time-independent operating stability in contact with solid electrolyte, and, hence, enhanced operating efficiency of electrode.

1 cl, 1 dwg, 1 tbl