Specific factors affecting performance indicators of fuel cells?

  Theoretical efficiency of solid oxide fuel cells (SOFC) is lower than MCFC and PAFC. However, the polarization of the high temperature SOFC is low, and the voltage loss is mainly protected by the ohmic loss of the component. The cathode ohmic polarization is the main reason. Although the electrolyte and the electrical resistivity of the connector are high, the path is short. The conductive path of the cathode is long. 1, the effect of pressure As MCFC and PAFC, improve the pressure to improve the performance of SOFC.   2, the effect of temperature At 800 ¡ã C, the slope of the voltage-current density curve increases, the main reason is that the electrolyte ion conductivity is significantly reduced, and the ohmic polarization increases. In contrast, at 1050 ¡ã C, ohmic polarization decreased, and the battery performance was improved.   3, influence of gas composition and utilization 3.1 oxidizing gas Like other fuel cells, the performance of SOFC is improved when using pure oxygen instead of air. 3.2 Fuel Gas The effect of fuel gas composition on SOFC theory open circuit is determined by O / C atomic ratio and H / C atomic ratio.   4, other factors 4.1 Effect of impurities The impurities in the gas are H, S, HCI and NH ,. 4000 mg / m 'NH, no effect on SOFC, 2mg / resistance HCI is basically no effect during 400h, 1.5mg / lining H, S on SOFC performance There is a significant impact. Continuing experiments have shown that if HZ S is removed from the fuel, the performance of SOFC is constantly returned to normal. Further, NH, 4000 mg / m, HC1 2 mg / m3, and the Hzs mass concentration is reduced to 0. 15 m to expand M3M, and the performance of SOFC has no effect.   4.2 Influence of current density The voltage loss of SOFC is made of ohmic loss, activation loss, and concentration loss, which increases with the increase of current density.   4.3 life Battle Life is a major head of SOFC. Any fuel cell must be commercialized and must guarantee considerable service life. AES design is nearly 1/3 of PST design power density, 25KW AES SOFC battery stack runs 13000H, thousands of hour voltage loss is not more than 0.2%   5, medium temperature SOFC Medium temperature SOFC refers to the working temperature 60 () a SOFC of 800 ¡ã C. Reduce the operating temperature of the SOFC, which can be used with a relatively low price, and the requirements and cost of the supporting equipment are also reduced. Since the electrode and electrolyte interface components are diffused, the life of high temperature SOFC is significantly limited. Low temperature eliminates interface diffusion phenomena and improves SOFC li Recommend: LiFePO4 Battery Manufacturer Energy storage battery Manufacturer Integrated machine energy storage battery series Manufacturer Lead lithium battery Manufacturer Outdoor Backup Battery Manufacturer Portable outdoor power supply Manufacturer Power battery Manufacturer Powerwall LiFePO4 Battery Manufacturer Battery rack Manufacturers Telecom LiFePO4 Battery Manufacturer Wall mounted battery storage Manufacturer China Lifepo4 Battery LiFePO4 Battery 48V 150AH LiFePO4 Battery 48V 100AH