200 results found
Qian H, Kucernak AR, Greenhalgh ES, et al., 2013, Multifunctional structural power composites based on carbon aerogel modified high performance carbon fibre fabrics, Pages: 2238-2243
Mistry M, Kucernak A, Nguyen S, et al., 2013, Addressing engineering issues for a composite structural power demonstrator, Pages: 2692-2700
© QinetiQ Ltd 2013. Engineering issues have been addressed for a Multifunctional (MF) Carbon Fibre Reinforced Polymer (CFRP) capable of storing electrical energy and carrying mechanical load. The MF material was integrated into a technology demonstrator in the form of a car boot lid where the boot lighting was powered independently of the car main electrical system. Current collection was improved by using a thin copper mesh on the carbon electrodes while hole drilling was found to have a negligible effect on the laminate electrical performance.
This paper presents the development of multifunctional materials that perform a structural role whilst simultaneously storing electrical energy as a supercapacitor. Two structural carbon fibre woven electrodeswere separated by a woven glass fibre layer, and infused with a multifunctional polymer electrolyte. Following characterisation of electrochemical and compressive performance, working structural supercapacitor prototypes were demonstrated. Since the relative mechanical and electrical demands are application specific, an optimisation methodology is proposed. Multifunctional composites were achieved, which had compressive moduli of up to 39 GPa and capacitances of up to 52 mF g 1.
Kucernak A, Bidault F, Smith G, 2012, Membrane electrode assemblies based on porous silver electrodes for alkaline anion exchange membrane fuel cells, ELECTROCHIMICA ACTA, Vol: 82, Pages: 284-290, ISSN: 0013-4686
Thepkaew J, Therdthianwong S, Kucernak A, et al., 2012, Electrocatalytic activity of mesoporous binary/ternary PtSn-based catalysts for ethanol oxidation, JOURNAL OF ELECTROANALYTICAL CHEMISTRY, Vol: 685, Pages: 41-46, ISSN: 1572-6657
Jiang J, Kucernak A, 2012, Mass transport and kinetics of electrochemical oxygen reduction at nanostructured platinum electrode and solid polymer electrolyte membrane interface, JOURNAL OF SOLID STATE ELECTROCHEMISTRY, Vol: 16, Pages: 2571-2579, ISSN: 1432-8488
Ahmad EA, Mallia G, Kramer D, et al., 2012, Comment on "2D Atomic Mapping of Oxidation States in Transition Metal Oxides by Scanning Transmission Electron Microscopy and Electron Energy-Loss Spectroscopy", PHYSICAL REVIEW LETTERS, Vol: 108, ISSN: 0031-9007
Bismarck A, Carreyette S, Fontana QPV, et al., 2012, Multifunctional epoxy resin for structural supercapacitors, ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials
Polymer-based electrolytes based on commercially available epoxy resins were prepared through the addition of a liquid electrolyte, a solution of a lithium salt in an ionic liquid. The polymer monoliths were characterized using impedance spectroscopy, 3-point bending test, scanning electron microscopy (SEM) and nitrogen adsorption (BET). The balance of ionic conductivity and flexural modulus is crucially dependent on the relative proportions of epoxy resin to electrolyte. Also the effect of the liquid electrolyte on curing kinetics and processing was assessed by complex viscosity measurements and differential scanning calorimetry (DSC). Only one out of the three resins investigated exhibited a significant acceleration effect.
Shirshova N, Shaffer M, Steinke JHG, et al., 2011, Structural Polymer Composites for Energy Storage Devices, International Conference on Advanced Capacitors (ICAC2007)
Cousens NEA, Kucernak AR, 2011, Increasing the potential window of the interface between two immiscible electrolyte solutions to more than 1.2 V, ELECTROCHEMISTRY COMMUNICATIONS, Vol: 13, Pages: 1539-1541, ISSN: 1388-2481
Ahmad EA, Liborio L, Kramer D, et al., 2011, Thermodynamic stability of LaMnO3 and its competing oxides: A hybrid density functional study of an alkaline fuel cell catalyst, PHYSICAL REVIEW B, Vol: 84, ISSN: 2469-9950
Elias S, Quinson J, Britovsek GJP, et al., 2011, Electrocatalytic CO2 reduction using modified electrodes, 242nd National Meeting of the American-Chemical-Society (ACS), Publisher: AMER CHEMICAL SOC, ISSN: 0065-7727
Bidault F, Kucernak A, 2011, Cathode development for alkaline fuel cells based on a porous silver membrane, JOURNAL OF POWER SOURCES, Vol: 196, Pages: 4950-4956, ISSN: 0378-7753
Sleightholme AES, Kucernak A, 2011, An anomalous peak observed in the electrochemistry of the platinum/perfluorosulfonic acid membrane interface, ELECTROCHIMICA ACTA, Vol: 56, Pages: 4396-4402, ISSN: 0013-4686
Mao B, Kurtoglu A, Kucernak ARJ, et al., 2011, Exploiting carbon nanotubes in fuel cells, NSTI Nanotechnology Conference and Expo, Publisher: CRC PRESS-TAYLOR & FRANCIS GROUP, Pages: 807-809
Shirshova N, Shaffer M, Steinke JHG, et al., 2011, Strutural Polymer Composites for Energy Storage Devices, 1st Chemical and Biomedical Engineering Symposium
Xu H, Zalitis C, Rivera-Hernandez M, et al., 2010, Fuel cell catalysts based on core-shell nano-particles, Pages: 475-476
In this work, we used platinum black to improve the dispersion mechanisms onto highly oriented pyrolytic graphite substrates by using different solvents in order to develop a methodology to disperse core-shell Pt nanoparticles. With this technique, we found that pure isopropyl alcohol exhibited better dispersion onto graphite in comparison with a mixed solution. Although SEM and STM images revealed in general a poor dispersion, some aggregates and few individual particles scattered onto the graphite surface were observed.
Bidault F, Kucernak A, 2010, A novel cathode for alkaline fuel cells based on a porous silver membrane, JOURNAL OF POWER SOURCES, Vol: 195, Pages: 2549-2556, ISSN: 0378-7753
Brett DJL, Kucernak AR, Aguiar P, et al., 2010, What happens inside a fuel cell? Developing an experimental functional map of fuel cell performance, ChemPhysChem, Vol: 11, Pages: 2714-2731
Brown RJC, Brett DJL, Kucernak ARJ, 2009, An electrochemical quartz crystal microbalance study of platinum phthalocyanine thin films, JOURNAL OF ELECTROANALYTICAL CHEMISTRY, Vol: 633, Pages: 339-346, ISSN: 1572-6657
Jiang J, Kucernak A, 2009, Probing anodic reaction kinetics and interfacial mass transport of a direct formic acid fuel cell using a nanostructured palladium-gold alloy microelectrode, ELECTROCHIMICA ACTA, Vol: 54, Pages: 4545-4551, ISSN: 0013-4686
Jiang J, Kucernak A, 2009, Electrocatalytic properties of nanoporous PtRu alloy towards the electrooxidation of formic acid, JOURNAL OF ELECTROANALYTICAL CHEMISTRY, Vol: 630, Pages: 10-18, ISSN: 1572-6657
Jiang J, Kucernak A, 2009, Electrodeposition of highly alloyed quaternary PtPdRuOs catalyst with highly ordered nanostructure, ELECTROCHEMISTRY COMMUNICATIONS, Vol: 11, Pages: 1005-1008, ISSN: 1388-2481
kucernak, junhua J, 2009, NANOPOROUS/MESOPOROUS PALLADIUM CATALYST
The present invention provides a catalytic system comprising a catalyst comprising nanoporous or mesoporous palladium and an ion-exchange electrolyte, processes for manufacturing the catalytic system and catalyst, and processes for oxidising or reducing organic and/or inorganic molecules using the catalyst or catalytic system.
Jiang J, Kucernak A, 2009, Synthesis of highly active nanostructured PtRu electrocatalyst with three-dimensional mesoporous silica template, ELECTROCHEMISTRY COMMUNICATIONS, Vol: 11, Pages: 623-626, ISSN: 1388-2481
Kim J-D, Ohnuma M, Nishimura C, et al., 2009, Small-Angle X-Ray Scattering and Proton Conductivity of Anhydrous Nafion-Benzimidazole Blend Membranes, JOURNAL OF THE ELECTROCHEMICAL SOCIETY, Vol: 156, Pages: B729-B734, ISSN: 0013-4651
Brett DJL, Kucernak AR, Atkins S, 2009, Experimental functional map of a polymer electrolyte fuel cell, ISBN: 9781604565607
© 2008 by Nova Science Publishers, Inc. All rights reserved. Fuel cell performance is determined by the complex interplay of mass transport, energy transfer and electrochemical processes. The convolution of these processes leads to spatial heterogeneity in the way that fuel cells perform, particularly due to reactant consumption, water management and the design of fluid-flow plates. It is therefore unlikely that any bulk measurement made on a fuel cell will represent performance at all parts of the cell. The ability to make spatially resolved measurements in a fuel cell provides one of the most useful ways in which to monitor and optimise performance. This book reviews the range of in situ techniques being used to study fuel cells and describes the use of novel experimental techniques that the authors have used to develop an experimental functional map of polymer electrolyte fuel cell (PEFC) performance. These techniques include the mapping of current density, electrochemical impedance, electrolyte conductivity, contact resistance and CO poisoning distribution within working PEFCs, as well as mapping the flow of reactant in gas channels using laser Doppler anemometry (LDA). The combination of these techniques, applied across a range of fuel cell operating conditions allows a unique picture of the internal workings of PEFCs to be obtained and has been used to validate both numerical and analytical models.
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