372 results found
Balcombe P, Brandon NP, Hawkes AD, 2018, Characterising the distribution of methane and carbon dioxide emissions from the natural gas supply chain, JOURNAL OF CLEANER PRODUCTION, Vol: 172, Pages: 2019-2032, ISSN: 0959-6526
Few SPM, Schmidt O, Offer GJ, et al., 2018, Prospective improvements in cost and cycle life of off-grid lithium-ion battery packs: An analysis informed by expert elicitations, Energy Policy, Vol: 114, Pages: 578-590, ISSN: 0301-4215
This paper presents probabilistic estimates of the 2020 and 2030 cost and cycle life of lithium-ion battery (LiB) packs for off-grid stationary electricity storage made by leading battery experts from academia and industry, and insights on the role of public research and development (R&D) funding and other drivers in determining these. By 2020, experts expect developments to arise chiefly through engineering, manufacturing and incremental chemistry changes, and expect additional R&D funding to have little impact on cost. By 2030, experts indicate that more fundamental chemistry changes are possible, particularly under higher R&D funding scenarios, but are not inevitable. Experts suggest that significant improvements in cycle life (eg. doubling or greater) are more achievable than in cost, particularly by 2020, and that R&D could play a greater role in driving these. Experts expressed some concern, but had relatively little knowledge, of the environmental impact of LiBs. Analysis is conducted of the implications of prospective LiB improvements for the competitiveness of solar photovoltaic + LiB systems for off-grid electrification.
Song B, Ruiz-Trejo E, Bertei A, et al., 2018, Quantification of the degradation of Ni-YSZ anodes upon redox cycling, JOURNAL OF POWER SOURCES, Vol: 374, Pages: 61-68, ISSN: 0378-7753
Wang X, Chen Z, Atkinson A, et al., 2018, Numerical study of solid oxide fuel cell contacting mechanics, Fuel Cells, ISSN: 1615-6846
Assembly of a planar solid oxide fuel cell (SOFC) or solid electrolyzer (SOE) stack involves the lamination of cells and interconnect plates under an applied load. In most designs a pattern of ribs on the interconnector makes contact with a porous ceramic current collector layer on the air side. These localized contacts are regions of increased stress on the cells and can cause damage if the stresses become too large. In this paper the mechanical response of an anode-supported cell to localized loads from interconnector ribs is simulated. The simulations show that the critical stress for initiating and propagating a crack in the electrolyte (∼300MPa for a 10 μm thick electrolyte) is reached when the interconnector displacement reaches 20 μm (after touching the cathode) with reduced support, or 30 μm when in an oxidized state. The difference is due to the lower stiffness of the reduced support. The residual compressive stress in the electrolyte layer has a major protective effect for the electrolyte. It is concluded that fracture is very unlikely for a geometrically perfect contact, but if the contact is non-uniform due to manufacturing variability in the contact plate or cell, local displacements >∼20 μm can be dangerous. The simulations are used in an example of contacting geometry optimization.
Balcombe P, Anderson K, Speirs J, et al., 2017, The Natural Gas Supply Chain: The Importance of Methane and Carbon Dioxide Emissions, ACS SUSTAINABLE CHEMISTRY & ENGINEERING, Vol: 5, Pages: 3-20, ISSN: 2168-0485
Bertei A, Ruiz-Trejo E, Kareh K, et al., 2017, The fractal nature of the three-phase boundary: A heuristic approach to the degradation of nanostructured solid oxide fuel cell anodes, NANO ENERGY, Vol: 38, Pages: 526-536, ISSN: 2211-2855
Bertei A, Tariq F, Yufit V, et al., 2017, Guidelines for the Rational Design and Engineering of 3D Manufactured Solid Oxide Fuel Cell Composite Electrodes, JOURNAL OF THE ELECTROCHEMICAL SOCIETY, Vol: 164, Pages: F89-F98, ISSN: 0013-4651
Biton M, Tariq F, Yufit V, et al., 2017, Integrating multi-length scale high resolution 3D imaging and modelling in the characterisation and identification of mechanical failure sites in electrochemical dendrites, ACTA MATERIALIA, Vol: 141, Pages: 39-46, ISSN: 1359-6454
Biton M, Yufit V, Tariq F, et al., 2017, Enhanced Imaging of Lithium Ion Battery Electrode Materials, JOURNAL OF THE ELECTROCHEMICAL SOCIETY, Vol: 164, Pages: A6032-A6038, ISSN: 0013-4651
Brandon NP, Kurban Z, 2017, Clean energy and the hydrogen economy, PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, Vol: 375, ISSN: 1364-503X
Brandon NP, Ruiz-Trejo E, Boldrin P, 2017, Solid Oxide Fuel Cell Lifetime and Reliability: Critical Challenges in Fuel Cells, ISBN: 9780128097243
© 2017 Elsevier Ltd. All rights reserved. Solid Oxide Fuel Cell Lifetime and Reliability: Critical Challenges in Fuel Cells presents in one volume the most recent research that aims at solving key issues for the deployment of SOFC at a commercial scale and for a wider range of applications. To achieve that, authors from different regions and backgrounds address topics such as electrolytes, contaminants, redox cycling, gas-tight seals, and electrode microstructure. Lifetime issues for particular elements of the fuel cells, like cathodes, interconnects, and fuel processors, are covered as well as new materials. They also examine the balance of SOFC plants, correlations between structure and electrochemical performance, methods for analysis of performance and degradation assessment, and computational and statistical approaches to quantify degradation. For its holistic approach, this book can be used both as an introduction to these issues and a reference resource for all involved in research and application of solid oxide fuel cells, especially those developing understanding in industrial applications of the lifetime issues. This includes researchers in academia and industrial R & D, graduate students and professionals in energy engineering, electrochemistry, and materials sciences for energy applications. It might also be of particular interest to analysts who are looking into integrating SOFCs into energy systems. Brings together in a single volume leading research and expert thinking around the broad topic of SOFC lifetime and durability. Explores issues that affect solid oxide fuel cells elements, materials, and systems with a holistic approach. Provides a practical reference for overcoming some of the common failure mechanisms of SOFCs. Features coverage of integrating SOFCs into energy systems.
Chakrabarti B, Nir D, Yufit V, et al., 2017, Performance Enhancement of Reduced Graphene Oxide-Modified Carbon Electrodes for Vanadium Redox-Flow Systems, CHEMELECTROCHEM, Vol: 4, Pages: 194-200, ISSN: 2196-0216
Chen J, Bertei A, Ruiz-Trejo E, et al., 2017, Characterization of Degradation in Nickel Impregnated Scandia-Stabilize Zirconia Electrodes during Isothermal Annealing, JOURNAL OF THE ELECTROCHEMICAL SOCIETY, Vol: 164, Pages: F935-F943, ISSN: 0013-4651
Chen J, Ruiz-Trejo E, Atkinson A, et al., 2017, Microstructural and electrochemical characterisation of degradation in nickel impregnated scandia-stabilised zirconia electrode during isothermal annealing, Pages: 1125-1137, ISSN: 1938-5862
© The Electrochemical Society. In this study, we examine the degradation of nickel impregnated scandia-stabilised zirconia (ScSZ) electrode in wet hydrogen at a working temperature of SOFCs. Continuous van der Pauw measurement was carried out when the electrode was aged at 650oC in an atmosphere with 5 vol% hydrogen and 95 vol% nitrogen. A fall in sheet conductivity was found in the electrode during ageing within 1000 min. Electrochemical impedance spectra were collected at a constant time intervals during isothermal annealing at 650oC, 800oC and 950oC for the impregnated electrode, at open circuit. Three resistance contributions were decoupled by equivalent circuit fitting, i.e. the ohmic resistance, the anodic reaction resistance, and the gas diffusion resistance. Secondary electron images of electrodes before and after ageing showed an increase in nickel particle size and a decrease in the number of particles, providing microstructural evidence of coarsening. Nickel coarsening was identified as the main mechanism of degradation for the electrode in wet hydrogen.
Chen X, Liu X, Childs P, et al., 2017, A Low Cost Desktop Electrochemical Metal 3D Printer, ADVANCED MATERIALS TECHNOLOGIES, Vol: 2, ISSN: 2365-709X
Chen Y, Ji L, Brandon N, et al., 2017, A study on the flow field design of lead flow batteries, Pages: 199-200
Chen Z, Wang X, Brandon N, et al., 2017, Analysis of spherical indentation of porous ceramic films, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, Vol: 37, Pages: 1031-1038, ISSN: 0955-2219
Chen Z, Wang X, Brandon N, et al., 2017, Spherical indentation of bilayer ceramic structures: Dense layer on porous substrate, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, Vol: 37, Pages: 4763-4772, ISSN: 0955-2219
Cooper SJ, Brandon NP, 2017, An Introduction to Solid Oxide Fuel Cell Materials, Technology and Applications, ISBN: 9780128097243
© 2017 Elsevier Ltd. All rights reserved. This chapter begins with a brief history of fuel cell development and introduces solid oxide fuel cells (SOFCs) as high efficiency energy conversion devices. Following this the fundamentals of SOFC performance and cell design are explored, with special focus given to the significance of operating temperature and microstructure. Next the current commercial status of SOFCs is outlined in brief. Finally, SOFC degradation, the major theme of this book, is introduced; the various mechanisms are split into the two broad categories of physical and chemical degradation.
Cooper SJ, brandon NP, 2017, Solid Oxide Fuel Cell Lifetime and Reliability, Solid Oxide Fuel Cell Lifetime and Reliability Critical Challenges in Fuel Cells, Editors: Ruiz-Trejo, BOLDRIN, Publisher: Academic Press, Pages: 1-15, ISBN: 9780128097243
For its holistic approach, this book can be used both as an introduction to these issues and a reference resource for all involved in research and application of solid oxide fuel cells, especially those developing understanding in ...
Jais AA, Ali SAM, Anwar M, et al., 2017, Enhanced ionic conductivity of scandia-ceria-stabilized-zirconia (10Sc1CeSZ) electrolyte synthesized by the microwave-assisted glycine nitrate process, CERAMICS INTERNATIONAL, Vol: 43, Pages: 8119-8125, ISSN: 0272-8842
Jamil Z, Ruiz-Trejo E, Brandon NP, 2017, Nickel Electrodeposition on Silver for the Development of Solid Oxide Fuel Cell Anodes and Catalytic Membranes, JOURNAL OF THE ELECTROCHEMICAL SOCIETY, Vol: 164, Pages: D210-D217, ISSN: 0013-4651
Jing R, Wang M, Brandon N, et al., 2017, Multi-criteria evaluation of solid oxide fuel cell based combined cooling heating and power (SOFC-CCHP) applications for public buildings in China, Energy, Vol: 141, Pages: 273-289, ISSN: 0360-5442
© 2017 Elsevier Ltd This study aims to evaluate the feasibility of solid oxide fuel cell based combined cooling heating and power (SOFC-CCHP) applications in public buildings of China from different perspectives. Operations of the natural gas fueled SOFC-CCHP systems for 20 years’ have been simulated for five categories of public buildings in five locations of China. Parallel simulations of combustion based CCHP systems and conventional system have been conducted for comparison. By single criterion assessment, SOFC-CCHP systems demonstrate outstanding performance on energy efficiency as well as reducing carbon emission, air pollution and human health damage cost. The levelized cost of energy (LCOE) turns out to be competitive with commercial electricity price, but a long payback period (SPP) has also been identified. To further assess the overall performance of SOFC-CCHP systems, a multi-criteria assessment model has been developed by combining the gray relational analysis (GRA) approach and the entropy-weighting method. The result indicates that hospital, hotel, and supermarket achieve more benefits than office and school; warmer regions rank slightly higher than colder regions. In addition, sensitivity analysis has been performed on SPP and LCOE. Overall, this paper provides theoretical guidance and evaluation approach for SOFC-CCHP demonstrations in China.
Jing R, Wang M, Wang W, et al., 2017, Economic and environmental multi-optimal design and dispatch of solid oxide fuel cell based CCHP system, ENERGY CONVERSION AND MANAGEMENT, Vol: 154, Pages: 365-379, ISSN: 0196-8904
Liu X, Wu B, Brandon N, et al., 2017, Tough Ionogel-in-Mask Hybrid Gel Electrolytes in Supercapacitors with Durable Pressure and Thermal Tolerances, ENERGY TECHNOLOGY, Vol: 5, Pages: 220-224, ISSN: 2194-4288
Mukerjee S, Leah R, Selby M, et al., 2017, Life and Reliability of Solid Oxide Fuel Cell-Based Products: A Review, Solid Oxide Fuel Cell Lifetime and Reliability: Critical Challenges in Fuel Cells, Pages: 173-191, ISBN: 9780128097243
© 2017 Elsevier Ltd. All rights reserved. Solid oxide fuel cells (SOFCs) are a technology rapidly developing toward widespread commercialization, with hundreds of megawatts of generation capacity installed in the field for large-scale power generation (100. kW-1. MW), and small-scale distributed power generation ( < 5. kW scale) undergoing large precommercial field trials in Europe and Japan. Although rapidly improving, challenges still remain in achieving SOFC stack operating lives of up to 90,000. h at a cost competitive with more established power generation technology. This chapter provides a review of the current development status of the main SOFC developers and technology variants based on publicly available literature. The techniques being developed to accelerate technology development cycles by enabling lifetime prediction from relatively short-duration tests are also discussed.
Munoz CAP, Dewage HH, Yufit V, et al., 2017, A Unit Cell Model of a Regenerative Hydrogen-Vanadium Fuel Cell, JOURNAL OF THE ELECTROCHEMICAL SOCIETY, Vol: 164, Pages: F1717-F1732, ISSN: 0013-4651
Ouyang M, Boldrin P, Brandon NP, 2017, Methane pulse study on nickel impregnated gadolinium doped ceria, Pages: 1353-1366, ISSN: 1938-5862
© The Electrochemical Society. Ni/CGO was prepared via impregnation. A facile methane pulse experiment was performed on Ni/CGO under SOFC operating condition. The outlet gas was monitored by a quadrupole mass spectrometer. A Van-Mars Krevelen type mechanism was proposed for methane reaction on Ni/CGO and analyzed in detail. The method showed promising prospect in analyzing mechanism of hydrocarbon oxidation and the results provide a new insight in the strategy of preventing carbon deposition on nickel catalyst when operating as a SOFC anode materials.
Riveros M, Guo M, van Dam KH, et al., 2017, Carbon Arbitrage with Stationary Batteries in the City of London, 27th European Symposium on Computer-Aided Process Engineering (ESCAPE), Publisher: ELSEVIER SCIENCE BV, Pages: 529-534, ISSN: 1570-7946
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