Novel cobalt-free cathode material (Nd0.9La0.1)2(Ni0.74Cu0.21Al0.05)O4+δ for intermediate-temperature solid oxide fuel cells

Effects of sintering temperature on the structural and electrochemical properties of SrFe0.5Ti0.5O3‐δ perovskite cathode

“…The highest electrical conductivity measured at 800°C is still considered far from the theoretical value of 100 S cm −1 . Even so, the electrochemical performance of this material can achieve an ASR value below 1 Ω cm 2 , as shown in the other cobalt‐free cathodes . For the ITSOFC cathode performance, ASR values reflect the potential of the material in an oxygen‐reduction reaction environment rather than the electrical conductivity.…”

Synthesis and Electrochemical Studies of Novel Cobalt Free (Nd0.9La0.1)1.6Sr0.4 Ni0.75Cu0.25O3.8 (NLSNC4) Cathode Material for IT‐SOFCs

“…The XRD patterns of as‐prepared SDC and NLSNC4 powders are shown in Figure . NLSNC4 shows diffraction peaks relating to K 2 NiF 4 ‐type layered perovskite structure with tetragonal symmetry (I4/mmm space group) , . Room temperature XRD patterns of the SDC/NLSNC4 mixture after firing at 1,300 °C for 3 h in the air is also shown in Figure c.…”

“…Figure shows the Arrhenius plot of electrical conductivity for the NLSNC4 material sintered at 1,300 °C. This plot is almost linear at low temperature region, indicating that the dominant electrical conduction mechanism is thermally activated small‐polaron . Additionally, the corresponding activation energy ( E a ) for the electrical conductivity in this region was calculated based on the Arrhenius relationship …”

Challenges in Fabricating Solid Oxide Fuel Cell Stacks for Portable Applications: A Short Review

“…Compared with pure electronic conducting materials that only allow reaction on the TPB, MIEC materials allow oxygen reduction to occur on both surface and bulk path. However, despite the good electrochemical performance of LSCF at a low operating temperature, the existence of cobalt in this MIEC material increases the thermal expansion coefficient of the cathode and leads to incompatibility with the electrolyte [20]. Thus, various cobalt-free materials have been developed, such as NLNCA oxide (Nd 0.9 La 0.1 ) 2 (Ni 0.74 Cu 0.21 Al 0.05 )O 4+δ [20] and SFT oxide (SrFe 0.9 Ti 0.1 O 3-δ ) [21].…”

“…However, despite the good electrochemical performance of LSCF at a low operating temperature, the existence of cobalt in this MIEC material increases the thermal expansion coefficient of the cathode and leads to incompatibility with the electrolyte [20]. Thus, various cobalt-free materials have been developed, such as NLNCA oxide (Nd 0.9 La 0.1 ) 2 (Ni 0.74 Cu 0.21 Al 0.05 )O 4+δ [20] and SFT oxide (SrFe 0.9 Ti 0.1 O 3-δ ) [21]. Alternatively, the additional of silver (Ag) into cathode has also been studied extensively to reduce the cathode polarization resistance, hence, will increase the cell performance.…”