Imperial College London

ProfessorJohnKilner

Faculty of EngineeringDepartment of Materials

BCH Steele Chair in Energy Materials
 
 
 
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Contact

 

+44 (0)20 7594 6745j.kilner Website

 
 
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Location

 

214Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

523 results found

Manalastas W, Rikarte J, Chater RJ, Brugge R, Aguadero A, Buannic L, Llordes A, Aguesse F, Kilner Jet al., 2019, Mechanical failure of garnet electrolytes during Li electrodeposition observed by in-operando microscopy, JOURNAL OF POWER SOURCES, Vol: 412, Pages: 287-293, ISSN: 0378-7753

JOURNAL ARTICLE

Akbay T, Kilner JA, Ishihara T, Atkinson Cet al., 2019, Explicit Solution To Extract Self-Diffusion and Surface Exchange Coefficients from Isotope Back-Exchange Experiments, JOURNAL OF PHYSICAL CHEMISTRY C, Vol: 123, Pages: 258-264, ISSN: 1932-7447

JOURNAL ARTICLE

Staykov A, Fukumori S, Yoshizawa K, Sato K, Ishihara T, Kilner Jet al., 2018, Interaction of SrO-terminated SrTiO3 surface with oxygen, carbon dioxide, and water, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 6, Pages: 22662-22672, ISSN: 2050-7488

JOURNAL ARTICLE

Shen Z, Kilner JA, Skinner SJ, 2018, Mass Transport in (La0.8Sr0.2)(0.95)CrxFe1-xO3-delta-Scandia-Stabilized Zirconia Dual-Phase Composite as a Dense Layer in Oxygen Transport Membranes, JOURNAL OF PHYSICAL CHEMISTRY C, Vol: 122, Pages: 27135-27147, ISSN: 1932-7447

JOURNAL ARTICLE

Saranya AM, Morata A, Pla D, Burriel M, Chiabrera F, Garbayo I, Hornes A, Kilner JA, Tarancon Aet al., 2018, Unveiling the outstanding oxygen mass transport properties of Mn-rich perovskites in grain boundary-dominated La0.8Sr0.2(Mn1-xCox)(0.85)O-3 +/-delta nanostructures, Chemistry of Materials, Vol: 30, Pages: 5621-5629, ISSN: 0897-4756

Ion transport in solid-state devices is of great interest for current and future energy and information technologies. A superior enhancement of several orders of magnitude of the oxygen diffusivity has been recently reported for grain boundaries in lanthanum–strontium manganites. However, the significance and extent of this unique phenomenon are not yet established. Here, we fabricate a thin film continuous composition map of the La0.8Sr0.2(Mn1–xCox)0.85O3±δ family revealing a substantial enhancement of the grain boundary oxygen mass transport properties for the entire range of compositions. Through isotope-exchange depth profiling coupled with secondary ion mass spectroscopy, we show that this excellent performance is not directly linked to the bulk of the material but to the intrinsic nature of the grain boundary. In particular, the great increase of the oxygen diffusion in Mn-rich compositions unveils an unprecedented catalytic performance in the field of mixed ionic–electronic conductors. These results present grain boundaries engineering as a novel strategy for designing highly performing materials for solid-state ionics-based devices.

JOURNAL ARTICLE

Niania M, Podor R, Ben Britton T, Li C, Cooper SJ, Svetkov N, Skinner S, Kilner Jet al., 2018, In situ study of strontium segregation in La0.6Sr0.4Co0.2Fe0.8O3-delta in ambient atmospheres using high-temperature environmental scanning electron microscopy, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 6, Pages: 14120-14135, ISSN: 2050-7488

JOURNAL ARTICLE

Shen Z, Kilner JA, Skinner SJ, 2018, Electrical conductivity and oxygen diffusion behaviour of the (La0.8Sr0.2)(0.95)CrxFe1-xO3-delta (x=0.3, 0.5 and 0.7) A-site deficient perovskites, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Vol: 20, Pages: 18279-18290, ISSN: 1463-9076

JOURNAL ARTICLE

Wu J, Fujii K, Yashima M, Staykov A, Akbay T, Ishihara T, Kilner JAet al., 2018, A systematic evaluation of the role of lanthanide elements in functional complex oxides; implications for energy conversion devices, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 6, Pages: 11819-11829, ISSN: 2050-7488

JOURNAL ARTICLE

Brugge RH, Hekselman AKO, Cavallaro A, Pesci FM, Chater RJ, Kilner JA, Aguadero Aet al., 2018, Garnet Electrolytes for Solid State Batteries: Visualization of Moisture-Induced Chemical Degradation and Revealing Its Impact on the Li-Ion Dynamics, CHEMISTRY OF MATERIALS, Vol: 30, Pages: 3704-3713, ISSN: 0897-4756

JOURNAL ARTICLE

Leonard K, Druce J, Thoreton V, Kilner JA, Matsumoto Het al., 2018, Exploring mixed proton/electron conducting air electrode materials in protonic electrolysis cell, SOLID STATE IONICS, Vol: 319, Pages: 218-222, ISSN: 0167-2738

JOURNAL ARTICLE

Pergolesi D, Gilardi E, Fabbri E, Roddatis V, Harrington GF, Lippert T, Kilner JA, Traversa Eet al., 2018, Interface effects on the ionic conductivity of doped ceria-yttria-stabilized zirconia heterostructures, ACS Appl Mater Interfaces, Vol: 10, Pages: 14160-14169, ISSN: 1944-8244

Multilayered heterostructures of Ce0.85Sm0.15O2-δ and Y0.16Zr0.92O2-δ of a high crystallographic quality were fabricated on (001)-oriented MgO single crystal substrates. Keeping the total thickness of the heterostructures constant, the number of ceria-zirconia bilayers was increased while reducing the thickness of each layer. At each interface Ce was found primarily in the reduced, 3+ oxidation state in a layer extending about 2 nm from the interface. Concurrently, the conductivity decreased as the thickness of the layers was reduced, suggesting a progressive confinement of the charge transport along the YSZ layers. The comparative analysis of the in-plane electrical characterization suggests that the contribution to the total electrical conductivity of these interfacial regions is negligible. For the smallest layer thickness of 2 nm the doped ceria layers are electrically insulating and the ionic transport only occurs through the zirconia layers. This is explained in terms of a reduced mobility of the oxygen vacancies in the highly reduced ceria.

JOURNAL ARTICLE

Pramana SS, Cavallaro A, Li C, Handoko AD, Chan KW, Walker RJ, Regoutz A, Herrin JS, Yeo BS, Payne DJ, Kilner JA, Ryan MP, Skinner SJet al., 2018, Crystal structure and surface characteristics of Sr-doped GdBaCo2O6-delta double perovskites: oxygen evolution reaction and conductivity, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 6, Pages: 5335-5345, ISSN: 2050-7488

JOURNAL ARTICLE

Cavallaro A, Pramana SS, Ruiz-Trejo E, Sherrell PC, Ware E, Kilner JA, Skinner SJet al., 2018, Amorphous-cathode-route towards low temperature SOFC, SUSTAINABLE ENERGY & FUELS, Vol: 2, Pages: 862-875, ISSN: 2398-4902

JOURNAL ARTICLE

Staykov A, Tellez H, Druce J, Wu J, Ishihara T, Kilner Jet al., 2018, Electronic properties and surface reactivity of SrO terminated SrTiO3 and SrO-terminated iron-doped SrTiO3, SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS, Vol: 19, Pages: 221-230, ISSN: 1468-6996

JOURNAL ARTICLE

Harrington GF, Skinner SJ, Kilner JA, 2018, Can solute segregation in ceramic materials be reduced by lattice strain?, JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Vol: 101, Pages: 1310-1322, ISSN: 0002-7820

JOURNAL ARTICLE

Lozano HT, Druce J, Cooper SJ, Kilner JAet al., 2017, Double perovskite cathodes for proton-conducting ceramic fuel cells: are they triple mixed ionic electronic conductors?, SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS, Vol: 18, Pages: 977-986, ISSN: 1468-6996

JOURNAL ARTICLE

Li C, Pramana SS, Ni N, Kilner J, Skinner SJet al., 2017, Surface Chemistry of La0.99Sr0.01NbO4-d and Its Implication for Proton Conduction, ACS APPLIED MATERIALS & INTERFACES, Vol: 9, Pages: 29633-29642, ISSN: 1944-8244

JOURNAL ARTICLE

Harrington GF, Cavallaro A, McComb DW, Skinner SJ, Kilner JAet al., 2017, The effects of lattice strain, dislocations, and microstructure on the transport properties of YSZ films, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Vol: 19, Pages: 14319-14336, ISSN: 1463-9076

JOURNAL ARTICLE

Wu K-T, Tellez H, Druce J, Burriel M, Yang F, McComb DW, Ishihara T, Kilner JA, Skinner SJet al., 2017, Surface chemistry and restructuring in thin-film Lan+1NinO3n+1 (n=1, 2 and 3) Ruddlesden-Popper oxides, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 5, Pages: 9003-9013, ISSN: 2050-7488

JOURNAL ARTICLE

Cooper SJ, Niania M, Hoffmann F, Kilner JAet al., 2017, Back-exchange: a novel approach to quantifying oxygen diffusion and surface exchange in ambient atmospheres, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Vol: 19, Pages: 12199-12205, ISSN: 1463-9076

JOURNAL ARTICLE

Buannic L, Orayech B, Lopez Del Amo J-M, Carrasco J, Katcho NA, Aguesse F, Manalastas W, Zhang W, Kilner J, Llordes Aet al., 2017, Dual Substitution Strategy to Enhance Li+ Ionic Conductivity in Li7La3Zr2O12 Solid Electrolyte, CHEMISTRY OF MATERIALS, Vol: 29, Pages: 1769-1778, ISSN: 0897-4756

JOURNAL ARTICLE

Aguesse F, Manalastas W, Buannic L, Lopez del Amo JM, Singh G, Llordes A, Kilner Jet al., 2017, Investigating the Dendritic Growth during Full Cell Cycling of Garnet Electrolyte in Direct Contact with Li Metal, ACS APPLIED MATERIALS & INTERFACES, Vol: 9, Pages: 3808-3816, ISSN: 1944-8244

JOURNAL ARTICLE

Chater RJ, Cavallaro A, Bayliss RD, Cook SN, Esser BD, McComb DW, Kilner JAet al., 2017, Fast grain boundary oxygen ion diffusion in the alpha-phase of Bi2O3, SOLID STATE IONICS, Vol: 299, Pages: 89-92, ISSN: 0167-2738

JOURNAL ARTICLE

Burriel M, Tellez H, Chater RJ, Castaing R, Veber P, Zaghrioui M, Ishihara T, Kilner JA, Bassat J-Met al., 2016, Influence of Crystal Orientation and Annealing on the Oxygen Diffusion and Surface Exchange of La2NiO4+delta, JOURNAL OF PHYSICAL CHEMISTRY C, Vol: 120, Pages: 17927-17938, ISSN: 1932-7447

JOURNAL ARTICLE

Druce J, Tellez H, Ishihara T, Kilner JAet al., 2016, Surface Composition and Oxygen Exchange Properties of Alkaline Earth-Free Perovskites; LaCo0.6Ni0.4O3, 229th Meeting of The-Electrochemical-Society / Symposium on Ionic and Mixed Conducting Ceramics, Publisher: ELECTROCHEMICAL SOC INC, Pages: 71-80, ISSN: 1938-5862

CONFERENCE PAPER

Akbay T, Staykov A, Druce J, Tellez H, Ishihara T, Kilner JAet al., 2016, The interaction of molecular oxygen on LaO terminated surfaces of La2NiO4, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 4, Pages: 13113-13124, ISSN: 2050-7488

JOURNAL ARTICLE

Tellez H, Druce J, Ishihara T, Kilner JAet al., 2016, Effects of Microstructure on Surface Segregation: Role of Grain Boundaries, 229th Meeting of The-Electrochemical-Society / Symposium on Ionic and Mixed Conducting Ceramics, Publisher: ELECTROCHEMICAL SOC INC, Pages: 57-69, ISSN: 1938-5862

CONFERENCE PAPER

Cooper SJ, Bertei A, Shearing PR, Kilner JA, Brandon NPet al., 2016, TauFactor: An open-source application for calculating tortuosity factors from tomographic data, SoftwareX, Vol: 5, Pages: 203-210

© 2016 The Author(s) TauFactor is a MatLab application for efficiently calculating the tortuosity factor, as well as volume fractions, surface areas and triple phase boundary densities, from image based microstructural data. The tortuosity factor quantifies the apparent decrease in diffusive transport resulting from convolutions of the flow paths through porous media. TauFactor was originally developed to improve the understanding of electrode microstructures for batteries and fuel cells; however, the tortuosity factor has been of interest to a wide range of disciplines for over a century, including geoscience, biology and optics. It is still common practice to use correlations, such as that developed by Bruggeman, to approximate the tortuosity factor, but in recent years the increasing availability of 3D imaging techniques has spurred interest in calculating this quantity more directly. This tool provides a fast and accurate computational platform applicable to the big datasets (>108 voxels) typical of modern tomography, without requiring high computational power.

JOURNAL ARTICLE

Limbeck A, Rupp GM, Kubicek M, Tellez H, Druce J, Ishihara T, Kilner JA, Fleig Jet al., 2016, Dynamic etching of soluble surface layers with on-line inductively coupled plasma mass spectrometry detection - a novel approach for determination of complex metal oxide surface cation stoichiometry, JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, Vol: 31, Pages: 1638-1646, ISSN: 0267-9477

JOURNAL ARTICLE

Staykov A, Tellez H, Akbay T, Druce J, Ishihara T, Kilner Jet al., 2015, Oxygen Activation and Dissociation on Transition Metal Free Perovskite Surfaces, CHEMISTRY OF MATERIALS, Vol: 27, Pages: 8273-8281, ISSN: 0897-4756

JOURNAL ARTICLE

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