Investigation of chemical compatibility between B-site doped La substituted SrTiO3 anode and stabilized zirconia electrolyte

Advanced Fuel Cell Based on Perovskite La–SrTiO3 Semiconductor as the Electrolyte with Superoxide-Ion Conduction

“…It is important to note that although LST is an electronic conductor in a reducing atmosphere in the traditional sense,P 23,[29][30] P the open circuit voltages of the cell are 1.128, 1.141 and 1.212 at 550, 500 and 450 °C, respectively, in agreement with the values calculated using the Nernst equation.P 24 P Fig. 3 shows the OCV changes with time after HR 2R and air were supplied on two sides of the cell with the LST electrolyte.…”

“…La 0.25 Sr 0.75 Ti 1 O 3 powders were synthesized by the sol−gel method. 23 The pyrolyzed LST ash was sintered at 1200 °C in air for 2 h in the present case. The as-prepared LST was employed as the electrolyte, which was sandwiched between two Ni-foam layers pasted with Ni 0.8 Co 0.15 Al 0.05 LiO 2 (NCAL) used as the electrode and current connector.…”

Electrochemical mechanisms of an advanced low-temperature fuel cell with a SrTiO3 electrolyte

“…23 It can be seen that a uniform perovskite phase was formed aer sintering at 800 C and no additional phase was formed. 23 On increasing the sintering temperature to 1000 and 1200 C, the diffraction peak of STO becomes sharper, and obvious peak splitting occurs at high angles due to two types of Ka X-rays (Ka1 and Ka2) with similar wavelength (Ka1 ¼ 1.54056Å, Ka2 ¼ 1.54439 A), which indicates that the STO formed a good cubic structure. 23 The crystallinity of the STO sintered at 800 and 1000 C was not good.…”

“…23 On increasing the sintering temperature to 1000 and 1200 C, the diffraction peak of STO becomes sharper, and obvious peak splitting occurs at high angles due to two types of Ka X-rays (Ka1 and Ka2) with similar wavelength (Ka1 ¼ 1.54056Å, Ka2 ¼ 1.54439 A), which indicates that the STO formed a good cubic structure. 23 The crystallinity of the STO sintered at 800 and 1000 C was not good. The best cubic phase structure of STO was formed at 1200 C. Therefore, the STO sintered at 1200 C was used as the electrolyte material in this study.…”

“…It is well known that LST is an electronic conductor in a reducing atmosphere, but it is also a semiconductor with a relatively wide band gap in an air atmosphere. [21][22][23] This kind of semiconductor material as the electrolyte does not cause short circuiting inside the fuel cell. 1,24,25 Zhou et al recently used a mixed electronic and ionic conductor, SmNiO 3 (SNO), as a SOFC electrolyte with a power output of 225 mW cm À2 at 500 C. 24 Zhou et al also introduced the concept of strong electron correlation and proposed that the hydrogenation process at the anode of the cell creates an electrically insulating H-SNO-layer on the anode side.…”