Investigation of Impactors on Cell Degradation Inside Planar SOFC Stacks

Guan, Wanbing; Jin, Le; Ma, Xiangyuan; Wang, W. G.

doi:10.1002/fuce.201200063

Cited by 30 publications

(8 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The proportion of the voltage drop of anode support 1 accounting to the total voltage drop of stack 1 was higher than that of anode support 2 to stack 2. This phenomenon resulted from the improvement of the cathode–interconnect contact, which offsets part of the anode degradation in accordance with our previous reports 22, 23.…”

Section: Resultssupporting

confidence: 92%

In suit Investigation of Anode Support on Cell Performance Reduced under Various Temperatures for Planar Solid Oxide Fuel Cells

2015

Self Cite

View full text Add to dashboard Cite

The performance of anode support of Ni-YSZ reduced from room temperature (T R ) to working temperature (T w ) and at T w in anode-supported planar solid oxide fuel cell was investigated quantitatively in situ. A 2 μm thick Pt voltage probe was embedded at the interface between the anode support and the function anode in the cell. Results showed that the power densities of the stack that was reduced from T R to T w (stack 1) and stack reduced at T w (stack 2) were 0.343 W cm -2 and 0.583 W cm -2 with the corresponding fuel utilization of 36.28% and 63.87%, respectively, under the operating voltage of 0.8 V. The degradation rate of stack 1 was 7.76 times more than that of stack 2 when the stack was discharged under a constant current of 0.476 Acm -2 for 100 h. Ni particles agglomerated in the anode support of the cell inside stack 1, whereas Ni particles in the anode support of the cell inside stack 2 were evenly distributed. The performance of stack 1 was poor mainly because of the increasing ohmic and polarization resistances caused by Ni agglomeration and decreasing porosity of the anode support.

show abstract

Section: Resultssupporting

confidence: 92%

In suit Investigation of Anode Support on Cell Performance Reduced under Various Temperatures for Planar Solid Oxide Fuel Cells

2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…Therefore, the oxygen reduction reaction in the cathode tripe-phase boundaries has more electrons from the interconnect, causing a substantial increase in cell performance. It was also found that cell degradation inside the stack, is principally dependent on the interfacial contact between the cathode current collecting layer and the interconnect [7].…”

Section: Introductionmentioning

confidence: 99%

Effects of using (La0.8Sr0.2)0.95Fe0.6Mn0.3Co0.1O3 (LSFMC), LaNi0.6Fe0.4O3−δ (LNF) and LaNi0.6Co0.4O3−δ (LNC) as contact materials on solid oxide fuel cells

Morán-Ruiz

Vidal

Laguna‐Bercero

et al. 2014

Journal of Power Sources

View full text Add to dashboard Cite

Three lanthanum-based perovskite ceramic compounds as contact materials, (La 0.8 Sr 0.2) 0.95 Fe 0.6 Mn 0.3 Co 0.1 O 3 (LSFMC), LaNi 0.6 Fe 0.4 O 3- (LNF) and LaNi 0.6 Co 0.4 O 3- (LNC), were coated on Crofer22APU interconnect and then, La 0.6 Sr 0.4 FeO 3 (LSF) cathode was deposited on each of contact layers, using in both contact coating is applied between Crofer22APU and LSF cathode without compromising the contact resistance of the system.

show abstract

“…[11][12][13] Furthermore, the quantitative contributions of the resistance sources of components to stack performance were obtained by our group. We concluded that stack performance is signifi cantly affected by cell performance itself when excellent stack sealing and contact among internal components are provided.…”

mentioning

confidence: 99%

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

Guan

Wang

et al. 2014

Advanced Energy Materials

View full text Add to dashboard Cite

performance, except for the materials of components when the stack is sealed properly. [11][12][13] Furthermore, the quantitative contributions of the resistance sources of components to stack performance were obtained by our group. 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. Accordingly, traditional methods, such as electrochemical impedance spectroscopy (EIS) and current-voltage ( I -V ) measurement, have been generally applied to investigate factors that affect cell performance using external probes placed on both sides of a unit cell. [17][18][19][20] However, traditional measurements do not distinguish between the quantitative effects of cell components on cell performance and degradation mechanisms. These effects result from complex physical and chemical processes at the triple-phase boundary (TPB) within the cell. Meanwhile, common I -V measurement or EIS can only obtain variation patterns in a unit cell rather than in the individual cell components. [ 21,22 ] Thus, special voltage probes embedded into the internal TPB are necessary to measure cell components (i.e., anode, electrolyte, and cathode) individually and to obtain their quantitative contributions on cell performance. However, for anode-supported planar SOFCs, the introduction of an internal voltage probe at the TPB within the cell is an immense challenge because of the thin electrolyte, [ 17 ] the active anode, [ 23 ] and the active cathode. [ 24 ] Consequently, an in situ investigation of the quantitative contributions of components (i.e., anode, electrolyte, and cathode) to cell performance has not been reported for anode-supported planar SOFCs.In the present work, a novel in situ measurement technique is developed according to the conventional structure of anode-supported SOFCs. Pt voltage probes are embedded into A novel method that embeds Pt voltage probes into the triple-phase boundary (TPB) is developed. Moreover, the quantitative contributions of the anode, the cathode, and the electrolyte to cell performance are investigated in situ for anode-supported planar solid oxide fuel cells (SOFCs). The voltage and maximum output power density (MOPD) measured by the probes, which are placed on both sides of the electrolyte, account for 97.3% and 94.4%, respectively, of those of the cell during the instantaneous current-voltage testing. When the stack is discharged at 0.32 A cm −2 for 200 h, the voltage drops of the an...

show abstract

Investigation of Impactors on Cell Degradation Inside Planar SOFC Stacks

Cited by 30 publications

References 32 publications

In suit Investigation of Anode Support on Cell Performance Reduced under Various Temperatures for Planar Solid Oxide Fuel Cells

In suit Investigation of Anode Support on Cell Performance Reduced under Various Temperatures for Planar Solid Oxide Fuel Cells

Effects of using (La0.8Sr0.2)0.95Fe0.6Mn0.3Co0.1O3 (LSFMC), LaNi0.6Fe0.4O3−δ (LNF) and LaNi0.6Co0.4O3−δ (LNC) as contact materials on solid oxide fuel cells

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

Contact Info

Product

Resources

About