Influence of configuration and microstructure on performance of La2NiO4+δ intermediate-temperature solid oxide fuel cells cathodes

Hildenbrand, Nicolas; Nammensma, P.; Blank, Dave H.A.; Bouwmeester, Henny J.M.; Boukamp, Bernard A.

doi:10.1016/j.jpowsour.2013.03.192

Cited by 118 publications

(64 citation statements)

References 46 publications

(81 reference statements)

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“…Active sites will not be present in a CGO interlayer so it would therefore be of value to test dense L2N1 interlayers with more traditional SOFC cathode materials. Hildenbrand has shown that L2N1 interlayers can be deposited by PLD [18]. These will maximise the electrolyte/electrode contact as they are more uniform and of higher density than those made by screen printing used in this present study.…”

Section: Post-test Microstructural Analysismentioning

confidence: 90%

“…electrodes and indicates a change in the electrode-limiting step, believed to be due the limited electronic conductivity of L2N1 [8,9,17,18]. The next step in the grading regime is adding the thick porous composite layer.…”

Section: Electrochemical Testingmentioning

confidence: 99%

“…Alternatively, this layer can be made denser than the bulk electrode with a view to improving the electrolyte/electrode contact. This has been successfully used to improve the performance of single-phase L2N1 electrodes [16][17][18] and is the approach chosen here; functionally graded electrodes will start with a thin compact L2N1 layer. The bulk of the electrode will be made up of the porous L2N1+L4N3 composite used in our previous work as this gave better performance than either of the respective single phases [9].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Post-test Microstructural Analysismentioning

confidence: 90%

Section: Electrochemical Testingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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“…Due to the elimination of residual stress, a 25 % increase of the fracture strength was observed after an annealing process. The importance of small grain size of La2NiO4+δ has also been shown to be of importance for enhancing the oxygen flux of membranes [26].…”

Section: Discussionmentioning

confidence: 99%

Aqueous tape casting and mechanical properties of La2NiO4+δ dense membranes

Chen

Einarsrud

Grande

2015

Journal of the European Ceramic Society

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“…Such a layer has been prepared by dip-coating (2 μm thick) by Rieu [13] and by screen printing (5 μm thick) by Woolley [14], and it decreased polarization resistance of a La 2 NiO 4+δ electrode. Hildenbrand reported an improvement of the cathode/electrolyte interface for La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ (LSCF) and La 2 NiO 4+δ cathodes using a thin dense layer obtained by pulsed laser deposition [15,16]. Recently, Dumaisnil investigated a spin-coated 700-nm-thick LSCF layer between a Ce 0.9 Gd 0.1 O 2-δ electrolyte and an LSCF cathode [17].…”

Section: Introductionmentioning

confidence: 99%

Investigation of thin perovskite layers between cathode and doped ceria used as buffer layer in solid oxide fuel cells

Karczewski

Gazda

Szymczewska

et al. 2015

J Solid State Electrochem

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Porous and about 40-μm-thick LNF cathodes were deposited on both sides of the substrate and sintered at 1100°C. Different thicknesses of the thin perovskite layer were investigated in order to find the most effective one and to better understand its influence on the cathode/electrolyte interface. It was found that approximately 150 nm LNF or LSCF layer is sufficient to minimize interface resistance and improve cathode reproducibility. It was concluded that the thin perovskite layer increases contact area and improves the oxygen ion transport between the cathode and electrolyte without influencing the oxygen reduction reaction mechanism.

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Influence of configuration and microstructure on performance of La2NiO4+δ intermediate-temperature solid oxide fuel cells cathodes

Cited by 118 publications

References 46 publications

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

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

Aqueous tape casting and mechanical properties of La2NiO4+δ dense membranes

Investigation of thin perovskite layers between cathode and doped ceria used as buffer layer in solid oxide fuel cells

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