| 摘要 |
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 900-1100C, 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 600C with rate of 0.3-1/min, then up to 1200C - 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 1100-1250C for 0.5-3 hours. ^ EFFECT: improved specific characteristics of high-temperature electrochemical element (HECE). ^ 12 cl |
