HIGH-TEMPERATURE ELECTROCHEMICAL ELEMENT WITH ELECTROPHORETICALLY DEPOSITED HARD ELECTROLYTE AND METHOD OF ITS MANUFACTURING Russian patent published in 2009 - IPC H01M8/12 

FIELD: electricity.

SUBSTANCE: inventions are related to design of element of high-temperature electrochemical devices with hard electrolyte. According to invention, HECE comprises serially connected gas-diffusion cathode, hard electrolyte and gas-diffusion anode. Gas-diffusion cathode consists of at least two layers of nanomaterials: bearing collector layer and thin electrode layer with thickness of 5-20 mcm, consisting of nanopowders mixture. Cathode is connected with dense thin electrophoretic layer of hard electrolyte with thickness of 2-5 mcm from spherical weakly aggregated nanoparticles. A thin layer of gas-diffusion anode with thickness of 15-30 mcm consisting of nanoparticles is located on electrophoretic layer of hard electrolyte. According to method of HECE manufacturing, previously gas-diffusion porosity-gradient cathode is made, at least from two layers of nanomaterials: bearing collector layer and thin electrode layer with thickness of 5-20 mcm, consisting of nanopowders mixture. Produced gas-diffusion gradient cathode is baked at 900-1100°C, and nanoparticles of hard electrolyte are deposited on it by electrophoretic method at electric field intensity of 30-100 V/cm from suspension in nonaqueous dispersion medium containing binder of acrylate type, concentration of which makes 4-40 g/l, to produce a dense thin layer of hard electrolyte with thickness of 2-5 mcm. Cathode with applied layer of hard electrolyte is heated up to 600°C with rate of 0.3-1°/min, then up to 1200°C - 3-10°/min with further delay at this temperature for 3-5 hours. After delay layer of anode in the form of paste is applied onto layer of hard electrolyte, and is sintered to thin layer of anode hard electrolyte layer at 1100-1250°C for 0.5-3 hours.

EFFECT: improved specific characteristics of high-temperature electrochemical element (HECE).

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