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Y. Ramprakash

Bio: Y. Ramprakash is an academic researcher from Blackburn College. The author has contributed to research in topics: Electrode & Electrolyte. The author has an hindex of 2, co-authored 2 publications receiving 450 citations.

Papers
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Journal ArticleDOI
Sukhvinder P.S. Badwal1, R. Deller1, K. Foger1, Y. Ramprakash1, J.P. Zhang1 
TL;DR: In this article, the effect of chromia forming alloys on the performance of doped LaMnO3 air electrode has been studied at the current fuel cell operating temperatures in the vicinity of 900-1000 °C.

306 citations

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TL;DR: In this paper, the effect of cathodic current treatment on the electrode resistance and the mechanism of oxygen reduction has been investigated as a function of the A-site non-stoichiometry.

160 citations

TL;DR: The spectral response of the cells revealed a maximum at 0 85 p.m(1.43 eV) as mentioned in this paper , and the maximum energy conversion efficiency obtained was 18.6% Tbe shortcircuit current, lsc varied linearly with illumination intensity IL while the open-circuit voltage Voc was found to be proportional to (log 1 1)
Abstract: n-lnP/NaOH-(Fe(CN) 8)4 -'•-jPt photoelectrochemical cells have been designed and fabricated. The spectral response of the cells revealed a maximum at 0 85 p.m(1.43 eV). The maximum energy conversion efficiency obtained was 18.6%. Tbe short-circuit current, lsc varied linearly with illumination intensity IL while the open-circuit voltage Voc was found to be proportional to (log 1 1,)". The cells were found to be stable for a period of about 10 hrs. The performance of I-/1, and H 1 Q/Q as redox was found to be poor.

Cited by
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TL;DR: These advances have led to dozens of active SOFC development programs in both stationary and mobile power and contributed to commercialization or development in a number of related technologies, including gas sensors, solid-state electrolysis devices, and iontransport membranes for gas separation and partial oxidation.
Abstract: Recent worldwide interest in building a decentralized, hydrogen-based energy economy has refocused attention on the solid oxide fuel cell (SOFC) as a potential source of efficient, environmentally friendly, fuel-versatile electric power. Due to its high operating temperature, the SOFC offers several potential advantages over polymer-based fuel cells, including reversible electrode reactions, low internal resistance, high tolerance to typical catalyst poisons, production of high-quality waste heat for (among other uses) reformation of hydrocarbon fuels, as well as the possibility of burning hydrocarbon fuels directly. Today, SOFCs are much closer to commercial reality than they were 20 years ago, due largely to technological advances in electrode material composition, microstructure control, thin-film ceramic fabrication, and stack and system design. These advances have led to dozens of active SOFC development programs in both stationary and mobile power and contributed to commercialization or development in a number of related technologies, including gas sensors,1 solid-state electrolysis devices,2 and iontransport membranes for gas separation and partial oxidation.3 Many reviews are available which summarize the technological advances made in SOFCs over the last 15-35 yearssreaders who are primarily interested in knowing the state-of-the art in materials, design, and fabrication (including the electrodes) are encouraged to consult these reviews.4-12 This review focuses on the factors governing SOFC cathode performancesadvances we have made over † Dedicated to Brian Steele, 1929-2003. Researcher, Entrepreneur, Consensus Seeker. 4791 Chem. Rev. 2004, 104, 4791−4843

2,033 citations

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TL;DR: In this paper, the authors provide a comprehensive review with respect to the structure, chemistry, design and selection of materials, underlying mechanisms, and performance of each SOFC component, and it opens up the future directions towards pursuing SOFC research.

1,119 citations

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TL;DR: In this paper, the authors review the development of Cr-tolerant cathodes for intermediate temperature solid oxide fuel cells, and a possible mechanism of Cr deposition at cathodes are briefly reviewed as well.
Abstract: The composition and microstructure of cathode materials has a large impact on the performance of solid oxide fuel cells (SOFCs). Rational design of materials composition through controlled oxygen nonstoichiometry and defect aspects can enhance the ionic and electronic conductivities as well as the catalytic properties for oxygen reduction in the cathode. Cell performance can be further improved through microstructure optimization to extend the triple-phase boundaries. A major degradation mechanism in SOFCs is poisoning of the cathode by chromium species when chromium-containing alloys are used as the interconnect material. This article reviews recent developments in SOFC cathodes with a principal emphasis on the choice of materials. In addition, the reaction mechanism of oxygen reduction is also addressed. The development of Cr-tolerant cathodes for intermediate temperature solid oxide fuel cells, and a possible mechanism of Cr deposition at cathodes are briefly reviewed as well. Finally, this review will be concluded with some perspectives on the future of research directions in this area.

1,016 citations

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TL;DR: In this paper, a review of solid electrolytes being developed for solid oxide fuel cells, including zirconia-, ceria-and lanthanum gallate-based materials, are reviewed and compared.

837 citations