Thermodynamic analysis of the ternary La–Ni–O system

Zinkevich, M.; Aldinger, Fritz

doi:10.1016/j.jallcom.2003.11.138

Cited by 117 publications

(72 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From the phase diagram proposed by Zinkevich and Aldinger [19] it is known that at these temperatures L4N3 is unstable with respect to lower-order phases and NiO. We observed similar behaviour when sintering L4N3 electrodes directly onto LSGM at these temperatures; despite the slight decomposition good electronic conductivity is maintained in this layer [9].…”

Section: Xrdsupporting

confidence: 75%

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

View full text Add to dashboard Cite

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.

show abstract

Section: Xrdsupporting

confidence: 75%

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

View full text Add to dashboard Cite

show abstract

“…Fig. 4 presents the XRD patterns of annealed coatings [23]. Same behavior is noticed for both Ar flow rates studied in this work.…”

Section: Elaboration Of La-ni-o Coatingssupporting

confidence: 67%

Synthesis and characterization of La 2 NiO 4+δ coatings deposited by reactive magnetron sputtering using plasma emission monitoring

Fondard¹,

Billard²,

Bertrand³

et al. 2014

Solid State Ionics

View full text Add to dashboard Cite

Briois. Synthesis and characterization of La2NiO4+δ coatings deposited by reactive magnetron sputtering using plasma emission monitoring. Solid State Ionics, Elsevier, 2014, vol. 265, pp. 73-79. 10 This work focuses on the structural and electrical characterization of La-Ni-O coatings deposited by reactive magnetron sputtering using Plasma Emission Monitoring (PEM) which allows high deposition rate. The optimal regulation setpoint for lanthanum deposition is determined and then the current dissipated on the nickel target is adjusted to obtain the convenient La/Ni ratio to achieve the K 2 NiF 4 structure. After an appropriate annealing treatment, all coatings exhibit crystalline structures that depend on the La/Ni ratio. Some cracks appear on samples deposited on alumina substrates depending to the argon flow rate and influence their electrical behavior.

show abstract

“…This could be related to the harsh synthesis conditions required to obtain phasepure high-order Ruddlesden-Popper-type materials, which is refl ected in the complex La-Ni-O phase diagram calculated as shown in Figure 13 . [ 357 ] Both temperature and ratio variation of La and Ni could cause a distinct phase variation. Fortunately, several effective methods, such as the citrate method, [ 358 ] continuous hydrothermal fl ow synthesis method [ 359,360 ] and sol-gel method, [ 352,361 ] were effective for the synthesis of phase-pure high-order Ruddlesden-Popper-type phases.…”

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

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.

show abstract

Thermodynamic analysis of the ternary La–Ni–O system

Cited by 117 publications

References 62 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

Synthesis and characterization of La 2 NiO 4+δ coatings deposited by reactive magnetron sputtering using plasma emission monitoring

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

Contact Info

Product

Resources

About