Quantitative contribution of resistance sources of components to stack performance for planar solid oxide fuel cells

Quantitative contribution of resistance sources of components to stack performance for solid oxide electrolysis cells

“…1 to quantitatively measure the resistance of the components in the SRUs [12,14]. The interconnect resistance was measured by leads 1e2; the contact resistance between the hydrogen electrode current-collecting layer (HECCL) and the interconnect (hydrogen electrode CR), was measured by leads 2e3; the internal resistance of the UC was measured by leads 3e4; the contact resistance between the air electrode current-collecting layer (AECCL) and the interconnect (air electrode CR), was measured by leads 4e5; and the resistance of the SUR was measured by leads 1e5 [12,15].…”

“…Fig. 3b and c shows the variations of the ASRs of the UC, air electrode contact, hydrogen electrode contact and interconnect with time where the ASRs were measured and calculated via voltage measurements [12,15]. The air electrode CR slightly dropped within 115 h, and then continuously increased, the hydrogen electrode CR and the UC resistance continuously increased with time, and the interconnect resistance remained unchanged and negligible (0.001 U cm 2 ).…”

“…In SOFC stacks, the key causes influencing the operating stability of the stacks include stack components and the interfacial contact between the components [10,11]. In previous investigation, our group gave a quantitative description of the contributions of the resistance sources of components to SOFC stack performance [12], and found the increase of the cell resistance is the main reason causing the stack degradation and the anodic contact is also an influencing factor that cannot be neglected during stable operation.…”

In‐Situ Investigation of Quantitative Contributions of the Anode, Cathode, and Electrolyte to the Cell Performance in Anode‐Supported Planar SOFCs

“…We concluded that stack performance is signifi cantly affected by cell performance itself when excellent stack sealing and contact among internal components are provided. [ 14 ] Therefore, further improvement of cell performance (i.e., reducing cell resistance) and unit cell stability is crucial for SOFC stacks.Anode-supported planar SOFCs are widely used because of their superior performance and multi-layered structure that comprises several components (supported anode, anode function layer, electrolyte, and active cathode). [ 15,16 ] Thus, a quantitative understanding of how the cell components affect cell performance can function as a guide in optimizing cell performance.…”

Evaluation of Ag–NiO mixture as a cathode contact material for solid oxide fuel cell applications

“…12) It was observed that contact resistance could account for ³2030% resistance in a stack. 13) Variation of contact resistance from cell to cell in a stack could cause non-uniform power distribution over the consisting cells. 14) Silver has been considered a contact material based on its excellent electrical conductivity and low melting point (³962°C) which enhances effective sintering at SOFC operating temperatures.…”