Evaluation of the La2Ni1−xCuxO4+δ system as SOFC cathode material with 8YSZ and LSGM as electrolytes

Aguadero, Ainara; Alonso, J. A.; Escudero, M.J.; Daza, L.

doi:10.1016/j.ssi.2008.01.099

Cited by 171 publications

(89 citation statements)

References 15 publications

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“…The author attributed it to the high electrical conductivity of La 2 Ni 0.6 Cu 0.4 O 4 and good match in thermal expansion between the electrode and the electrolyte. [ 322 ] Kharton et al studied a La 2 Ni 0.8 Cu 0.2 O 4 +δ cathode on a LSGM electrolyte and high electrochemical performance is obtained at 800 °C. [ 327 ] The p(O 2 ) dependence of polarization resistance suggested that the cathodic reaction rate was affected by surface-related processes.…”

Section: Ruddlesden-popper-type Metal Oxidesmentioning

confidence: 99%

Advances in Cathode Materials for Solid Oxide Fuel Cells: Complex Oxides without Alkaline Earth Metal Elements

Chen

Zhou

Ding

et al. 2015

Advanced Energy Materials

250

155

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Solid oxide fuel cells (SOFCs) represent one of the cleanest and most efficient options for the direct conversion of a wide variety of fuels to electricity. For example, SOFCs powered by natural gas are ideally suited for distributed power generation. However, the commercialization of SOFC technologies hinges on breakthroughs in materials development to dramatically reduce the cost while enhancing performance and durability. One of the critical obstacles to achieving high‐performance SOFC systems is the cathodes for oxygen reduction reaction (ORR), which perform poorly at low temperatures and degrade over time under operating conditions. Here a comprehensive review of the latest advances in the development of SOFC cathodes is presented: complex oxides without alkaline earth metal elements (because these elements could be vulnerable to phase segregation and contaminant poisoning). Various strategies are discussed for enhancing ORR activity while minimizing the effect of contaminant on electrode durability. Furthermore, some of the critical challenges are briefly highlighted and the prospects for future‐generation SOFC cathodes are discussed. A good understanding of the latest advances and remaining challenges in searching for highly active SOFC cathodes with robust tolerance to contaminants may provide useful guidance for the rational design of new materials and structures for commercially viable SOFC technologies.

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Section: Ruddlesden-popper-type Metal Oxidesmentioning

confidence: 99%

Advances in Cathode Materials for Solid Oxide Fuel Cells: Complex Oxides without Alkaline Earth Metal Elements

Chen

Zhou

Ding

et al. 2015

Advanced Energy Materials

250

155

View full text Add to dashboard Cite

show abstract

“…This phase has attractive ionic conductivity however its performance as a cathode is limited by its electronic conductivity. Various efforts have been made to improve this by doping on the A-site, occupied by lanthanum, and/or the B-site, occupied by nickel [3][4][5]. Alternatively, it is known that electronic conductivity in these phases increases with n hence higher-order R-P phases have been considered; La 3 Ni 2 O 7-δ (L3N2) and La 4 Ni 3 O 10-δ (L4N3) [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Functionally graded composite La 2 NiO 4+δ and La 4 Ni 3 O 10−δ solid oxide fuel cell cathodes

Woolley

Skinner

2014

Solid State Ionics

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Functionally graded electrodes have been fabricated from members of the (LaNiO 3 ) n LaO RuddlesdenPopper family. These consist of a thin compact layer of La 2 NiO 4+δ deposited on the electrolyte, topped by a thicker porous La 2 NiO 4+δ +La 4 Ni 310-δ composite layer, completed by a thin porous La 4 Ni 3 O 10-δ layer acting as a current collector. The microstructure and electrochemical role of these layers is discussed in detail. It was found that using a 50:50 wt.% mix in the composite layer gave the best performance; ASRs at 500, 550, 600, 650, and 700 °C were 15.6, 5.53, 2.29, 1.06 and 0.53 Ωcm 2 respectively. This represents high performance for this class of material, particularly notable at the lower-end of the temperature range. As such this grading process is an attractive proposition for further research towards lowering the operating temperature of SOFCs.

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“…16) for LSM-YSZ cathode is attributed to oxygen ion transfer from the triple phase boundary to the electrolyte [42]. Mauvy et al also observed change in slope at P O 2 % 1;0 00 Pa 0:01 atm ð Þ in Nd 1.95 NiO 4+δ MIEC [43]. According to them, the ASR variation with P O 2 in this material is due to change in oxygen stoichiometry.…”

Section: à ámentioning

confidence: 80%

Electrochemical performance of strontium-doped neodymium nickelate mixed ionic–electronic conductor for intermediate temperature solid oxide fuel cells

Khandale

Punde²,

Bhoga

2012

J Solid State Electrochem

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The Nd 2− x Sr x NiO 4+δ (x00.1-0.5) solid solutions prepared by combustion synthesis are of submicron/superfine crystallite size. The crystal structure estimated by Rietveld analysis reveals increase in space in the rock salt layer on partial replacement of Nd 3+ by Sr 2+ . The transition from negative temperature coefficient to positive temperature coefficient of conductivity is observed at 913 K. The maximum dc conductivity (σ01.3±0.02 Scm −1 at 973 K) is obtained for x00.2 in Nd 2− x Sr x NiO 4+δ . The low dc conductivity compared with reported (≈100 Scm −1 ) is due to high porosity (low relative density) resulting from agglomeration of submicron crystallites. The variation in the conductivity with Sr content in Nd 2−x Sr x NiO 4+δ is understood on the basis of defect chemistry. The electrochemical properties of the cathode materials are studied using electrochemical impedance spectroscopy at various temperatures and oxygen partial pressures. Nd 1.8 Sr 0.2 NiO 4+δ cathode exhibits lowest-area-specific resistance 00.52 ± 0.015 Ohm cm 2 at 973 K. At low P O 2 (<1,000 Pa), oxygen ion transfer from Nd 1.8 Sr 0.2 NiO 4+δ cathode to gadolinium-doped ceria electrolyte is the rate-limiting step, whereas, charge-transfer reaction on the cathode becomes more important at high oxygen partial pressures and temperature (973 K).

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Evaluation of the La2Ni1−xCuxO4+δ system as SOFC cathode material with 8YSZ and LSGM as electrolytes

Cited by 171 publications

References 15 publications

Advances in Cathode Materials for Solid Oxide Fuel Cells: Complex Oxides without Alkaline Earth Metal Elements

Advances in Cathode Materials for Solid Oxide Fuel Cells: Complex Oxides without Alkaline Earth Metal Elements

Functionally graded composite La 2 NiO 4+δ and La 4 Ni 3 O 10−δ solid oxide fuel cell cathodes

Electrochemical performance of strontium-doped neodymium nickelate mixed ionic–electronic conductor for intermediate temperature solid oxide fuel cells

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