Imperial College London

Professor Nigel Brandon OBE FREng

Faculty of Engineering

Dean of the Faculty of Engineering
 
 
 
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Contact

 

+44 (0)20 7594 8600n.brandon Website

 
 
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Location

 

2.06Faculty BuildingSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

390 results found

Ruiz-Trejo E, Atkinson A, Brandon NP, 2015, Metallizing porous scaffolds as an alternative fabrication method for solid oxide fuel cell anodes, JOURNAL OF POWER SOURCES, Vol: 280, Pages: 81-89, ISSN: 0378-7753

JOURNAL ARTICLE

Ruiz-Trejo E, Zhou Y, Brandon NP, 2015, On the manufacture of silver-BaCe0.5Zr0.3Y0.16Zn0.04O3-delta composites for hydrogen separation membranes, INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, Vol: 40, Pages: 4146-4153, ISSN: 0360-3199

JOURNAL ARTICLE

Mazur C, Contestabile M, Offer GJ, Brandon NPet al., 2015, Assessing and comparing German and UK transition policies for electric mobility, ENVIRONMENTAL INNOVATION AND SOCIETAL TRANSITIONS, Vol: 14, Pages: 84-100, ISSN: 2210-4224

JOURNAL ARTICLE

, 2015, Multi length-scale quantification of hierarchical microstructure in designed microtubular SOFC electrodes, Pages: 1857-1864, ISSN: 1938-5862

© The Electrochemical Society. The transport properties of a micro-tubular solid oxide fuel cell (MT-SOFC) anode have been analysed by imaging and simulation at multiple length-scales. The anode support investigated was manufactured using a phase inversion-assisted co-extrusion process, which generated a hierarchical and highly anisotropic microstructure. The resulting pore network was observed to contain two distinct, but interacting transport systems. The features in these systems spanned several orders of magnitude and as such it was not possible to image or model them simultaneously. The simulations indicated that the design of the microstructure was beneficial for the radial transport required by these cells; however this conclusion was only obtained by considering diffusive systems at many length-scales.

CONFERENCE PAPER

, 2015, Towards the design-led optimization of solid oxide fuel cell electrodes, Pages: 2019-2028, ISSN: 1938-5862

© The Electrochemical Society. A one-dimensional numerical model of a nickel-infiltrated gadolinium-doped ceria (Ni-GDC) electrode has been developed to investigate the effects of electrode microstructure on performance. Electrode microstructural information was obtained with focused-ion beam tomography and microstructural parameters were quantified. These have been used to estimate the effective transport coefficients and the electrochemical reaction rate in the electrode. GDC was considered as a mixed ionic and electronic conductor and hence the electrochemical reaction was assumed to occur on the GDC-pore contact surface, i.e. double-phase boundaries (DPBs). Sensitivity analysis was conducted to investigate the effect of electrode microstructure on both transport properties and electrochemical activity. The developed model offers a basis to understand the electrode-microstructure relationships and to further optimize the electrode microstructures.

CONFERENCE PAPER

Brandon NP, 2015, Advanced 3D imaging and analysis of SOFC electrodes, Pages: 2067-2074, ISSN: 1938-5862

© The Electrochemical Society. An ability to meet our increasing energy demands will be facilitated though improving the next generation of electrochemical devices. The ability to directly image in 3D and analyse solid oxide fuel cell (SOFC) electrodes at high resolutions provides key insights in understanding structure-property relationships; as electrochemical reactions and transport phenomena are strongly affected by complex microstructure. Here we use tomographic techniques to probe 3D electrode structures at nanometer to micrometer length scales. In doing so the first characterisation of specific necks and interfaces alongside their particle sizes within SOFC electrodes is derived. Micro/nano structural changes are followed to facilitate understanding the differences which occur with shape, structures and morphology at high resolution. These are correlated with both measured experimental values and simulations to provide insight into microstructure-property relationships. We also demonstrate approaches to intelligently design electrodes through scaffolds, and potentially 3D printed structures, all towards optimising the structure for performance.

CONFERENCE PAPER

, 2015, Additive manufacturing for solid oxide cell electrode fabrication, Pages: 2119-2127, ISSN: 1938-5862

© The Electrochemical Society. Additive manufacturing can potentially offer a highly-defined electrode microstructure, as well as fast and reproducible electrode fabrication. Selective laser sintering is an additive manufacturing technique in which three-dimensional structures are created by bonding subsequent layers of powder using a laser. Although selective laser sintering can be applied to a wide range of materials, including metals and ceramics, the scientific and technical aspects of the manufacturing parameters and their impact on microstructural evolution during the process are not well understood. In the present study, a novel approach for electrode fabrication using selective laser sintering was evaluated by conducting a proof of concept study. A Ni-patterned fuel electrode was laser sintered on an yttria-stabilized zirconia substrate. The optimization process of laser parameters (laser sintering rate and laser power) and the electrochemical results of a full cell with a laser sintered electrode are presented. The challenges and prospects of using selective laser sintering for solid oxide cell fabrication are discussed.

CONFERENCE PAPER

Boldrin P, Ruiz-Trejo E, Tighe C, Chang KC, Darr J, Brandon NPet al., 2015, Impregnation of nanoparticle scaffolds for syngas-fed solid oxide fuel cell anodes, Pages: 1219-1227, ISSN: 1938-5862

© The Electrochemical Society. A strategy for fabrication of solid oxide fuel cell anodes with improved porosity and lower sintering temperatures by impregnation of nanoparticle-containing porous scaffolds of ceria-gadolinia (CGO) has been developed. The CGO scaffolds are fabricated using a screen-printed ink containing nanoparticles and commercial particles of CGO and polymeric pore formers. Scanning electron microscopy and in situ ultra-small angle X-ray scattering show that incorporation of nanoparticles increases the porosity by allowing a reduction in sintering temperature. Electrochemical characterisation of symmetrical cells shows that the cells sintered at 1000°C possess similar electrode polarisation compared to those sintered at 1300°C. Button cell testing showed that reducing the sintering temperature produced cells which perform better at 700°C and below in hydrogen, and performed better at all temperatures using syngas. This approach has the potential to allow the use of a wider range of nanomaterials, giving a finer control over microstructure.

CONFERENCE PAPER

Bahadori L, Chakrabarti MH, Hashim MA, Manan NSA, Mjalli FS, AlNashef IM, Brandon NPet al., 2015, Temperature Effects on the Kinetics of Ferrocene and Cobaltocenium in Methyltriphenylphosphonium Bromide Based Deep Eutectic Solvents, JOURNAL OF THE ELECTROCHEMICAL SOCIETY, Vol: 162, Pages: H617-H624, ISSN: 0013-4651

JOURNAL ARTICLE

Teng F, Pudjianto D, Strbac G, Brandon N, Thomson A, Miles Jet al., 2015, Potential value of energy storage in the UK electricity system, PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-ENERGY, Vol: 168, Pages: 107-117, ISSN: 1751-4223

JOURNAL ARTICLE

Dewage HH, Wu B, Tsoi A, Yufit V, Offer G, Brandon Net al., 2015, A novel regenerative hydrogen cerium fuel cell for energy storage applications, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 3, Pages: 9446-9450, ISSN: 2050-7488

JOURNAL ARTICLE

Boldrin P, Ruiz-Trejo E, Yu J, Gruar RI, Tighe CJ, Chang K-C, Ilavsky J, Darr JA, Brandon Net al., 2015, Nanoparticle scaffolds for syngas-fed solid oxide fuel cells, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 3, Pages: 3011-3018, ISSN: 2050-7488

JOURNAL ARTICLE

Boldrin P, Millan-Agorio M, Brandon NP, 2015, Effect of Sulfur- and Tar-Contaminated Syngas on Solid Oxide Fuel Cell Anode Materials, ENERGY & FUELS, Vol: 29, Pages: 442-446, ISSN: 0887-0624

JOURNAL ARTICLE

, 2015, Understanding the rheology of screen-printing inks for the fabrication of SOFC thick films, Pages: 1323-1331, ISSN: 1938-5862

© The Electrochemical Society. Fabrication of SOFC components by screen-printing using an optimized ink is very significant for the production of high quality films with improved performance. Understanding the correlation between the composition and rheology of the inks may enhance the properties screen-printed films. In this study, the rheological properties of NiO/ScSZ anode inks were studied and correlated to the particle network strength, screen-printability and film properties. All the inks were fabricated using a triple roll mill. The dynamic study showed that inks having particle network strength and complex modulus in the range of 50-200 Pa and 500-4000 Pa, respectively, were determined suitable for screen-printing application. In addition, these inks showed suitable viscosity and thixotropy with acceptable tackiness for screen-printing application. This range was exhibited by inks having binder and solids loading in the range of 1-3 wt% and 25-30 vol%, respectively. Furthermore, films fabricated using these inks showed improved particle connectivity, mechanical hardness, electrical and electrochemical performance resulting from increased particle connectivity.

CONFERENCE PAPER

Wu B, Yufit V, Merla Y, Martinez-Botas RF, Brandon NP, Offer GJet al., 2015, Differential thermal voltammetry for tracking of degradation in lithium-ion batteries, JOURNAL OF POWER SOURCES, Vol: 273, Pages: 495-501, ISSN: 0378-7753

JOURNAL ARTICLE

Cai Q, Adjiman CS, Brandon NP, 2014, Optimal control strategies for hydrogen production when coupling solid oxide electrolysers with intermittent renewable energies, JOURNAL OF POWER SOURCES, Vol: 268, Pages: 212-224, ISSN: 0378-7753

JOURNAL ARTICLE

Tariq F, Kishimoto M, Yufit V, Cui G, Somalu M, Brandon NPet al., 2014, 3D imaging and quantification of interfaces in SOFC anodes, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, Vol: 34, Pages: 3755-3761, ISSN: 0955-2219

JOURNAL ARTICLE

Kishimoto M, Lomberg M, Ruiz-Trejo E, Brandon NPet al., 2014, Enhanced triple-phase boundary density in infiltrated electrodes for solid oxide fuel cells demonstrated by high-resolution tomography, JOURNAL OF POWER SOURCES, Vol: 266, Pages: 291-295, ISSN: 0378-7753

JOURNAL ARTICLE

Rhazaoui K, Cai Q, Adjiman CS, Brandon NPet al., 2014, Towards the 3D modeling of the effective conductivity of solid oxide fuel cell electrodes - II. Computational parameters, CHEMICAL ENGINEERING SCIENCE, Vol: 116, Pages: 781-792, ISSN: 0009-2509

JOURNAL ARTICLE

Yang W, Zhao Y, Liso V, Brandon Net al., 2014, Optimal design and operation of a syngas-fuelled SOFC micro-CHP system for residential applications in different climate zones in China, ENERGY AND BUILDINGS, Vol: 80, Pages: 613-622, ISSN: 0378-7788

JOURNAL ARTICLE

Ruiz-Trejo E, Boldrin P, Lubin A, Tariq F, Fearn S, Chater R, Cook SN, Atkinson A, Gruar RI, Tighe CJ, Darr J, Brandon NPet al., 2014, Novel Composite Cermet for Low-Metal-Content Oxygen Separation Membranes, CHEMISTRY OF MATERIALS, Vol: 26, Pages: 3887-3895, ISSN: 0897-4756

JOURNAL ARTICLE

Howey DA, Mitcheson PD, Yufit V, Offer GJ, Brandon NPet al., 2014, Online Measurement of Battery Impedance Using Motor Controller Excitation, IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, Vol: 63, Pages: 2557-2566, ISSN: 0018-9545

JOURNAL ARTICLE

Maskell WC, Brett DJL, Brandon NP, 2014, Thick-film amperometric zirconia oxygen sensors: influence of cobalt oxide as a sintering aid, Publisher: IOP PUBLISHING LTD, ISSN: 0957-0233

CONFERENCE PAPER

Wu B, Parkes MA, Yufit V, De Benedetti L, Veismann S, Wirsching C, Vesper F, Martinez-Botas RF, Marquis AJ, Offer GJ, Brandon NPet al., 2014, Design and testing of a 9.5 kWe proton exchange membrane fuel cell-supercapacitor passive hybrid system, INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, Vol: 39, Pages: 7885-7896, ISSN: 0360-3199

JOURNAL ARTICLE

Chakrabarti MH, Brandon NP, Hajimolana SA, Tariq E, Yufit V, Hashim MA, Hussain MA, Low CTJ, Aravind PVet al., 2014, Application of carbon materials in redox flow batteries, JOURNAL OF POWER SOURCES, Vol: 253, Pages: 150-166, ISSN: 0378-7753

JOURNAL ARTICLE

Kalyvas C, Kucernak A, Brett D, Hinds G, Atkins S, Brandon Net al., 2014, Spatially resolved diagnostic methods for polymer electrolyte fuel cells: a review, WILEY INTERDISCIPLINARY REVIEWS-ENERGY AND ENVIRONMENT, Vol: 3, Pages: 254-275, ISSN: 2041-8396

JOURNAL ARTICLE

Eastwood DS, Bradley RS, Tariq F, Cooper SJ, Taiwo OO, Gelb J, Merkle A, Brett DJL, Brandon NP, Withers PJ, Lee PD, Shearing PRet al., 2014, The application of phase contrast X-ray techniques for imaging Li-ion battery electrodes, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, Vol: 324, Pages: 118-123, ISSN: 0168-583X

JOURNAL ARTICLE

Eastwood DS, Yufit V, Gelb J, Gu A, Bradley RS, Harris SJ, Brett DJL, Brandon NP, Lee PD, Withers PJ, Shearing PRet al., 2014, Lithiation- Induced Dilation Mapping in a Lithium- Ion Battery Electrode by 3D X- Ray Microscopy and Digital Volume Correlation, ADVANCED ENERGY MATERIALS, Vol: 4, ISSN: 1614-6832

JOURNAL ARTICLE

Tariq F, Yufit V, Kishimoto M, Shearing PR, Menkin S, Golodnitsky D, Gelb J, Peled E, Brandon NPet al., 2014, Three-dimensional high resolution X-ray imaging and quantification of lithium ion battery mesocarbon microbead anodes, JOURNAL OF POWER SOURCES, Vol: 248, Pages: 1014-1020, ISSN: 0378-7753

JOURNAL ARTICLE

Cooper SJ, Eastwood DS, Gelb J, Damblanc G, Brett DJL, Bradley RS, Withers PJ, Lee PD, Marquis AJ, Brandon NP, Shearing PRet al., 2014, Image based modelling of microstructural heterogeneity in LiFePO4 electrodes for Li-ion batteries, JOURNAL OF POWER SOURCES, Vol: 247, Pages: 1033-1039, ISSN: 0378-7753

JOURNAL ARTICLE

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