Synthesis and Electrochemical Studies of Novel Cobalt Free (Nd_0.9La_0.1)_1.6Sr_0.4 Ni_0.75Cu_0.25O_3.8 (NLSNC4) Cathode Material for IT‐SOFCs

Abstract

A novel cathode material of (Nd0.9La0.1)1.6Sr0.4Ni0.75Cu0.25O3.8 (NLSNC4), is synthesized by solid state reaction and is further investigated in combination with samarium doped ceria (SDC) as composite cathodes including 0, 10, 30, 50, and 70 of SDC electrolyte phase. The X‐ray diffraction analysis showed that NLSNC4 was produced in pure phase and was chemically compatible with SDC electrolyte. Electrical conductivities of single phase and composite cathode materials along with their electrochemical performances on SDC electrolytes in symmetric cells were measured by DC four‐probe method and electrochemical impedance spectroscopy (EIS), respectively. Results indicated that the maximum electrical conductivity is 135.56 S cm−1 at 350 °C, measured for single phase NLSNC4, sintered at 1,300 °C. Polarization resistance of pure NLSNC4 cathode was 2.71 Ω cm2 at 800 °C, and NLSNC4‐x wt.% SDC composite cathodes displayed Rp value of 0.35, 0.14, 0.12, and 0.32 Ω cm2 at 800 °C, for x = 10, 30, 50, and 70, respectively.

Anode‐supported solid oxide fuel cells with multilayer LSC/CGO/LSC cathode

“…Therefore, La 1−x Sr x CoO 3 (LSC)-and La x Sr 1-x Co y Fe 1-y O 3-d (LSCF)based systems are the most promising [11,18]. There are however alternative perovskite-type cathode materials, such as Sm 0.7 Sr 0.3 Co 3 [19], BaCo 0.7 Fe 0.2 Nb 0.1 O 3 [20], cobalt free (Nd 0.9 La 0.1 ) 1.6 Sr 0.4 Ni 0.75 Cu 0.25 O 3.8 [21], La 0.8 Sr 1.2 Fe 0.9 Cu 0.1 O 4 [22], and BaFe 1−x Cu x O 3 [23].…”

A Comprehensive Review of Thermal Management in Solid Oxide Fuel Cells: Focus on Burners, Heat Exchangers, and Strategies

“…One solution focuses on utilizing highly active component materials, starting with electrode materials of higher catalytic activity or electrolytes of higher ionic conductivity. However, the selection of SOFC component materials that reduce temperature while remaining cost-effective is quite limited [169,170]. Alternatively, temperature reduction can be achieved through improvements in manufacturing processes, such as nanostructured components and thin-film electrolytes [171,172].…”

Influence of A-Site Deficiency and Ca Concentration on the Electrical and Crystallographic Properties of (Nd0.2Sr0.7–xCax)yTi0.95Fe0.05O3−δ-Based Fuel Electrode for Solid Oxide Cells

“…Experimental evidence has shown that A-site deficiency can improve both electronic and ionic conductivity of Ln x Sr 1– x TiO 3−δ compounds. , As a result of creating A-site deficiency, the concentration of oxide ion vacancies and reducibility of Ti 4+ to Ti 3+ (leads to higher electronic conductivity) increases compared to nondeficient lattice. ,− Furthermore, A-site deficiency has also been used for mitigating Sr segregation, which may be a significant factor contributing to the deactivation of perovskite oxide surfaces and the subsequent degradation of SOC electrode performance. , …”