The new fuel cell materials
Spanish researchers have developed a fuel cell can effectively improve the efficiency of superlattice electrolyte materials than the current solid oxide fuel cell can greatly reduce costs.
Spanish researchers say such superlattice electrolyte (superlatticeelectrolyte) ionic conductivity than conventional fuel cell components increased by almost 1 million times. This new technology has been the U.S. Department of Energy's largest science and energy research laboratories - Oak Ridge National Laboratory accreditation.
DelphiAutomotiveSystems, BMW and Rolls-Royce has announced the development of solid oxide fuel cell program. However, if the vehicle allegedly used in fuel cells such new superlattice electrolyte, the battery can greatly improve efficiency and reduce production costs.
Ionic conductivity of these materials from the molecular structure of model type can see why it has better ionic conductivity. Superlattice Diego because the interface layer there is a large number of ion vacancies, thus allowing more ions to form a channel through the opening.
"Spanish researchers can measure the development of their superlattice material ionic conductivity, but no way to explain." Oak Ridge National Laboratory Materials Science & Technology Department MariaVarela said, "We can give images explain the reasons for the enhanced electrical conductivity. Through these images we can clearly see the tension in the crystal and the order of Jie Mianceng Fenzi structure and how they arranged to Ji Lizitigong wider the Chuansongtongdao.
MariaVarela asserted, "I do not know if the use of such fuel cells can superlattice electrolyte efficiency specific number, but I can say with certainty that it will significantly reduce the cost of fuel cells."
Spanish researchers found in two universities in Madrid: Madrid CommScope Princeton University (UniversidadComplutense) and UniversidadPolitcnica.
Solid oxide fuel cell operating temperature requirements than 1,000 ° F, but the new superlattice electrolyte not only has higher permeability - in order to improve the efficiency of fuel cells, also can work in close to room temperature, it reduces its own temperature and not as solid oxide fuel cells need to "warm up" period of time to work.
Solid oxide fuel cell cathode and anode separated by electrolyte, through the solid electrolyte with the number of positively charged oxygen ions and the circuit with a negative charge by the number of electrons are equal. External circuit connected with the fuel cell electrode. Solid electrolyte and by the Ford, Volkswagen, GE, Dupont and other companies are working to develop fuel cell polymer electrolyte membrane used in the same function.
The efficiency of solid oxide fuel cell electrolyte limited capacity to transfer oxygen ions, while the oxygen ions in the solid electrolyte to pass between the atoms. In order to achieve greater efficiency, solid electrolyte fuel cell operating temperature is usually higher than 1,000 ° F.
The new superlattice electrolyte with the internal structure of a wider gap for oxygen ions, without having to transfer from one atom to another atom. So even in room temperature conductivity of the material atom has also been greatly improved.
The new material is zirconium oxide layer and the oxide layer of strontium titanate overlap, these membranous materials oxygen ion permeability increase can be attributed to overlapping layer of the lattice mismatch. Oak Ridge National Laboratory, developers said they use the resolution of about 0.6 Angstrom (spectral line wavelength units), 300KV, Z contrast scanning transmission electron microscope to show that the lattice mismatch and the resulting gap.
Varela said, "We observed that the oxide layer due to lattice mismatch between the large number of oxygen led to the formation of ion channels."
R & D personnel will observe the results to those who want to interact with the new superlattice electrolyte layer development of solid oxide fuel cell R & D team circulated.
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