Thermodynamic properties of complex oxides in the La–Ni–O system

Bannikov, D.O.; Черепанов, В.А.

doi:10.1016/j.jssc.2006.05.026

Cited by 66 publications

(49 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At oxygen pressures close to atmospheric, perovskite-type LaNiO 3Àd is only stable below 1130-1250 K; further heating leads to the decomposition into K 2 NiF 4 -type La 2 NiO 4 þ d and NiO via the separation of Ruddlesden-Popper-type La 4 Ni 3 O 10Àd and La 3 Ni 2 O 7Àd phases at intermediate stages [152,199,200]. As for LaNiO 3Àd , these layered compounds display attractive electrochemical and transport properties, but suffer from an insufficient phase stability in the range of temperatures and oxygen chemical potentials necessary for practical applications [199][200][201][202][203].…”

Section: Perovskite-related Mixed Conductors: a Short Overviewmentioning

confidence: 99%

“…As for LaNiO 3Àd , these layered compounds display attractive electrochemical and transport properties, but suffer from an insufficient phase stability in the range of temperatures and oxygen chemical potentials necessary for practical applications [199][200][201][202][203]. Decreasing the Ln 3 þ cation radius and acceptor-type doping both have a negative influence on the stability of the nickelate.…”

Section: Perovskite-related Mixed Conductors: a Short Overviewmentioning

confidence: 99%

See 1 more Smart Citation

Oxygen Ion‐Conducting Materials

Хартон

Marques

Kilner

et al. 2009

Solid State Electrochemistry I

View full text Add to dashboard Cite

Oxygen ionic and mixed ionic-electronic conductors find important applications in solid-state electrochemical devices, including sensors, solid oxide fuel cells, hightemperature electrolyzers, and oxygen separation membranes. This chapter presents a brief overview of oxide phases with high diffusivity of O 2À anions, providing an introduction to this fascinating topic. Particular emphasis is centered on the comparative analysis of ionic and electronic conductivity variations in the major groups of solid oxide electrolytes and mixed conductors, such as perovskite-and fluorite-related compounds, apatite-type silicates, and derivatives of g-Bi 4 V 2 O 11 and b-La 2 Mo 2 O 9 . The defect chemistry mechanisms relevant to the oxygen ion migration processes are briefly discussed. IntroductionTechnologies based on the use of high-temperature electrochemical cells with oxygen anion-or mixed-conducting ceramics provide important advantages with respect to the conventional industrial processes [1][2][3][4][5][6][7][8]. In particular, solid oxide fuel cells (SOFCs) are considered as alternative electric power generation systems due to high energy-conversion efficiency, fuel flexibility, and environmental safety [1][2][3]. Dense ceramic membranes with mixed oxygen-ionic and electronic conductivity have an infinite theoretical separation factor with respect to oxygen, and can be used for gas separation and the partial oxidation of light hydrocarbons [4,5,7,8] (these and other applications are reviewed in Chapters 12 and 13). For all types of electrochemical cells, the key properties which determine the use of a material are the partial ionic and electronic conductivities. As an example, solid electrolytes for SOFCs, oxygen pumps and electrochemical sensors should exhibit a maximum oxygen ionic conductivity, while the electronic transport should be minimal. In contrast, for SOFC electrodes Solid State Electrochemistry I: Fundamentals, Materials and their Applications. Edited by Vladislav V. Kharton

show abstract

Section: Perovskite-related Mixed Conductors: a Short Overviewmentioning

confidence: 99%

Section: Perovskite-related Mixed Conductors: a Short Overviewmentioning

confidence: 99%

Oxygen Ion‐Conducting Materials

Хартон

Marques

Kilner

et al. 2009

Solid State Electrochemistry I

View full text Add to dashboard Cite

show abstract

“…Another important degradation mechanism of the La 2 NiO 4+δ membranes is associated with oxidation at high oxygen chemical potentials [6,61] and relatively low temperatures, i.e. decomposition of La 2 NiO 4+δ into Ruddlesden-Popper nickelates La n+1 Ni n O 3n+1±δ (n>1) and lanthanum oxide, which may then react with CO 2 or other gaseous species.…”

Section: Resultsmentioning

confidence: 99%

“…The microstructural changes observed on oxidation are expected to essentially limit the use of La 2 NiO 4+δ at elevated oxygen pressures and intermediate temperatures. In light of the thermodynamic data (see [61] and references cited), the lower temperature limit of the nickelate membrane operation at high p(O 2 ) cannot be decreased below 1,150-1,200 K. In this work, the temperature range of 1,260-1,300 K was considered for the membranes.…”

Section: Resultsmentioning

confidence: 99%

Simulation of a mixed-conducting membrane-based gas turbine power plant for CO2 capture: system level analysis of operation stability and individual process unit degradation

Colombo

Хартон

Viskup

et al. 2010

J Solid State Electrochem

View full text Add to dashboard Cite

A gas turbine power plant for CO 2 capture, based on oxygen-permeable membranes with mixed ionicelectronic conductivity, was analysed with respect to longterm stability by means of numerical simulation. Due to the attractive transport and physicochemical properties of mixed-conducting La 2 NiO 4+δ , this nickelate was selected as a prototype membrane material for this application. Experiments showed very slow degradation of La 2 NiO 4+δ membranes at oxygen chemical potentials close to atmospheric conditions, which are associated with kinetic demixing and other microstructure-related factors. Interaction with CO 2 in the intermediate temperature range also leads to lower oxygen permeation, whilst increasing oxygen pressure may cause partial phase decomposition and microstructural changes, thus again limiting the range of possible operation conditions. The relevant operational constraints were included in a detailed membrane-based gas turbine power plant model. The membrane performance degradation with time was approximated by a linear function with average rate of 3.3% per 1,000 operation hours. Furthermore, performance deterioration of the gas turbine compressor and turbine were also considered. Simulations revealed that the power plant is substantially affected by degradation of the ceramic membranes and turbomachinery components. The already rather small operating window was further narrowed when compared with a conventional gas turbine power plant. Two different designs of the membrane-based power plant were analysed: (1) with and (2) without additional combustors (afterburners) between the membrane reactor and the gas turbine. Afterburners increase thermal efficiency as well as power output, but also lead to non-negligible CO 2 emissions. In order to have a frame of comparison, results for a conventional gas turbine power plant with degradation of turbomachinery components are also presented. Simulations representing changes in ambient temperature and fuel composition as well as failure incidents were executed to analyse the susceptibility of the gas turbine power plant to external and internal changes.

show abstract

“…Thep ellet was sintered at 1000 8Cf or 10 ha tah eating rate of 1 8Cmin À1 and cooling to RT naturally.D uring the sintering process,a no xygenated atmosphere was used to suppress LaNiO 3 decomposition. [34] After sintering,t he porous electrode was rinsed in distilled water and then dried at 120 8C. Four porous electrodes were prepared with various LaNiO 3 /starch weight ratios of 5:0, 5:1, 5:2, and 5:5, denoted as LNO-5/0, LNO-5/1, LNO-5/2, and LNO-5/5, respectively.…”

Section: Preparation Of the Porous Cathodementioning

confidence: 99%

Integrated Porous Cathode made of Pure Perovskite Lanthanum Nickel Oxide for Nonaqueous Lithium–Oxygen Batteries

et al. 2015

View full text Add to dashboard Cite

The development of non‐carbon electrodes for nonaqueous lithium–oxygen batteries has become a recent focus as carbon electrodes were found to be unstable. Conventional non‐carbon electrodes are typically formed with a substrate/current collector, which will decrease the practical capacity. Here, we propose an integrated porous electrode made of LaNiO3 that does not require a substrate/current collector. The porous structure allows the formation of nanosized pores on the walls of microsized pores, which facilitates the transport of both oxygen and lithium ions. Importantly, all the surfaces of the porous structure are catalytically active for electrochemical reactions. Experimental results show that the adoption of the electrode in the battery enables a capacity of 1.064 mAh cm−2 at a current density of 0.05 mA cm−2. Furthermore, it is demonstrated that the battery can be cycled for at least 25 cycles at a fixed capacity of 0.3 mAh cm−2, and the electrode shows no degradation after the cycles.

show abstract

Thermodynamic properties of complex oxides in the La–Ni–O system

Cited by 66 publications

References 26 publications

Oxygen Ion‐Conducting Materials

Oxygen Ion‐Conducting Materials

Simulation of a mixed-conducting membrane-based gas turbine power plant for CO2 capture: system level analysis of operation stability and individual process unit degradation

Integrated Porous Cathode made of Pure Perovskite Lanthanum Nickel Oxide for Nonaqueous Lithium–Oxygen Batteries

Contact Info

Product

Resources

About