Double Perovskites as Anode Materials for Solid-Oxide Fuel Cells

Huang, Yunhui; Dass, Ronald I.; Xing, Zhengliang; Goodenough, John B

doi:10.1126/science.1125877

Cited by 1,003 publications

(503 citation statements)

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“…In a recent study, 6 a 300 μm-thick La 0.8 Sr 0.2 Ga 0.83 Mg 0.17 O 3 (LSGM) electrolyte-supported cell with double perovskite Sr 2 MgMoO 6 anode showed the peak power density of 438 mW cm −2 at 800 • C in CH 4 . The cell performance reported in this study is very encouraging because the cell obtained high performance in relatively low temperatures.…”

Section: Resultsmentioning

confidence: 99%

“…1,2 In addition, the nickel based anodes also suffer from the volume instability induced by redox cycling 3 as well as nickel particle agglomerations due to high temperature and long-term operations. 4 To overcome these issues, nickel-free metal oxide anode materials have been investigated, such as La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3−δ (LSCM), 5 Sr 2 Mg 1−x Mn x MoO 6−δ (x = 0 to 1), 6 and doped (La, Sr)(Ti)O 3 . 7,8 Experimental results have demonstrated that such anode materials are effective in inhibiting carbon deposition or sulfur poisoning.…”

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confidence: 99%

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A Ceramic-Anode Supported Low Temperature Solid Oxide Fuel Cell

Ding¹,

Ge²,

Xue³

2012

Electrochem. Solid-State Lett.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

A Ceramic-Anode Supported Low Temperature Solid Oxide Fuel Cell

Ding¹,

Ge²,

Xue³

2012

Electrochem. Solid-State Lett.

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“…In other words, these double perovskites do not contain a measurable concentration of permanent vacancies, but the lability of the oxygen atoms is sufficiently high to ensure an ionic transport from the surface to the electrolyte, via transient vacancies. Such a mechanism is possible in the present Mo-containing perovskites since, as noted by Goodenough et al, 14 than six-fold oxygen coordination, thus accepting the fast creation and displacement of oxygen vacancies.…”

Section: Thermal Expansionmentioning

confidence: 90%

Evaluation of Sr2MMoO6 (M = Mg, Mn) as anode materials in solid-oxide fuel cells: A neutron diffraction study

Troncoso

Martı́nez-Lope

Fernández‐Díaz

2013

Journal of Applied Physics

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Sr 2 MMoO 6 (M ¼ Mg, Mn) double perovskites have recently been proposed as anode materials in solid-oxide fuel cells (SOFC). The evolution of their crystal structures has been followed by "in situ" temperature-dependent neutron powder diffraction from 25 C room temperature (RT) to 930 C by heating in ultrahigh vacuum (P O2 % 10 À6 Torr) in order to simulate the reducing atmosphere corresponding to the working conditions of an anode in a SOFC. At RT, the samples are described as tetragonal (I4/m space group) and monoclinic (P2 1 /n) for M ¼ Mg, Mn, respectively. Sr 2 MgMoO 6 undergoes a structural phase transition from tetragonal to cubic (Fm-3m) below 300 C; Sr 2 MnMoO 6 experiences two consecutive phase transitions to tetragonal (I4/m) and finally cubic (Fm-3m) at 600 C and above. In the cubic phases, the absence of octahedral tilting accounts for a good overlap between the oxygen and transition-metal orbitals, resulting in a good electronic conductivity; a high mobility of the oxygen atoms is derived from the elevated displacement parameters, for instance 3.0 Å 2 and 4.6 Å 2 at 930 C for M ¼ Mg, Mn, respectively. Both factors contribute to the excellent performance described for these mixed ionic and electronic conductor oxides as anodes in single fuel cells. From dilatometric measurements, the thermal expansion coefficients (TEC) in the cubic region are 12.7 Â 10 À6 K À1 and 13.0 Â 10 À6 K À1 for M ¼ Mg and Mn, respectively. These figures are comparable to those obtained from the mentioned structural analysis; moreover, the TECs for the cubic phases perfectly match those of the usual electrolytes in a SOFC. V C 2013 American Institute of Physics. [http://dx

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“…74 Similarly, perovskite oxides based on Mo and Mn exhibit good catalytic activity for hydrocarbon fuel oxidation with a high tolerance to sulfur. 75 Of particular promise is the design of new cathode and anode materials as well as nanocomposites in which one component offers high electronic conductivity and the other component offers high oxide-ion conductivity. It was recently demonstrated that ion wires can be designed into gadolinium-doped ceria aerogel nanoarchitectures to create grain-boundary free, macroscopically long paths for oxide-ion transport, 76 which should improve the rate of fuel oxidation at the nanostructured, porous anode.…”

Section: Electrochemical: Fuel Cellsmentioning

confidence: 99%

Nanoscale design to enable the revolution in renewable energy

Baxter

Bian

Chen

et al. 2009

Energy Environ. Sci.

371

217

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The creation of a sustainable energy generation, storage, and distribution infrastructure represents a global grand challenge that requires massive transnational investments in the research and development of energy technologies that will provide the amount of energy needed on a sufficient scale and timeframe with minimal impact on the environment and have limited economic and societal disruption during implementation. In this opinion paper, we focus on an important set of solar, thermal, and electrochemical energy conversion, storage, and conservation technologies specifically related to recent and prospective advances in nanoscale science and technology that offer high potential in addressing the energy challenge. We approach this task from a two-fold perspective: analyzing the fundamental physicochemical principles and engineering aspects of these energy technologies and identifying unique opportunities enabled by nanoscale design of materials, processes, and systems in order to improve performance and reduce costs. Our principal goal is to establish a roadmap for research and development activities in nanoscale science and technology that would significantly advance and accelerate the implementation of renewable energy technologies. In all cases we make specific recommendations for research needs in the near-term (2-5 years), mid-term (5-10 years) and long-term (>10 years), as well as projecting a timeline for maturation of each technological solution. We also identify a number of priority themes in basic energy science that cut across the entire spectrum Broader contextA major scientific and societal challenge of the 21st century is the conversion from a fossil-fuel-based energy economy to one that is sustainable. The energy challenge before us differs in three ways from past large scale challenges: the first is the large magnitude and relatively short time scale of the transition (a predicted doubling of energy demand by mid-century and a tripling by the end of the century); the second is the need to develop CO 2 -neutral, renewable energy sources; and the third is the cost-competitive aspect of the transition (insofar as the cost of energy to the consumer must be competitive with the fossil fuel energy supply being replaced). What is clear is that the science and engineering research communities working with industry, and policy makers (government, economists, social scientists) will have to educate the citizenry and get them to function collaboratively and globally to enhance the quality of life and to preserve the environment of our planet for future generations. Our team has prepared a technical article on the role of nanotechnology in our energy future aimed at guiding both our own community of scientists and engineers and our policy makers who interface with the public. This journal is ª The Royal Society of Chemistry 2009Energy Environ. Sci., 2009, 2, 559-588 | 559 ANALYSIS www.rsc.org/ees | Energy & Environmental Science of energy conversion, storage, and conservation technologies. We anticipate t...

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Double Perovskites as Anode Materials for Solid-Oxide Fuel Cells

Cited by 1,003 publications

References 18 publications

A Ceramic-Anode Supported Low Temperature Solid Oxide Fuel Cell

A Ceramic-Anode Supported Low Temperature Solid Oxide Fuel Cell

Evaluation of Sr2MMoO6 (M = Mg, Mn) as anode materials in solid-oxide fuel cells: A neutron diffraction study

Nanoscale design to enable the revolution in renewable energy

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