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Seriani N. Ab initio thermodynamics of lithium oxides: from bulk phases to nanoparticles. NANOTECHNOLOGY 2009; 20:445703. [PMID: 19801778 DOI: 10.1088/0957-4484/20/44/445703] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Lithium ion batteries are nowadays key devices for energy storage, and a great research effort is under way to develop and apply new materials. Recently, new approaches have been proposed that rely on the reversible formation of either Li2O or Li2O2 at the electrodes. The details of their formation and dissolution are, however, still unclear. As a first step towards the understanding of these processes, bulk lithium oxides, their surfaces and their nanoparticles have been here investigated by density functional theory and ab initio thermodynamics. At a pressure of 1 atmosphere of oxygen, Li2O2 is the stable bulk phase below 5 K, where a transition to Li2O takes place. Wulff's construction predicts an octahedral shape for Li2O nanoparticles and the form of a hexagonal prism for Li2O2. By taking into account the effect of the surfaces, a size-dependent phase diagram is calculated. At an oxygen pressure of 1 atmosphere and a temperature of 300 K, Li2O is the stable phase for particles with a diameter larger than approximately 2.5 nm. This size-dependent oxidation behavior of lithium should be taken into account in the design of nanostructured oxygen cathodes.
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Affiliation(s)
- Nicola Seriani
- Fakultät für Physik, Universität Wien, Sensengasse 8/12, A-1090 Wien, Austria.
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Della-Longa S, Chen LX, Frank P, Hayakawa K, Hatada K, Benfatto M. Direct Deconvolution of Two-State Pump-Probe X-ray Absorption Spectra and the Structural Changes in a 100 ps Transient of Ni(II)-tetramesitylporphyrin. Inorg Chem 2009; 48:3934-42. [DOI: 10.1021/ic8008943] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- S. Della-Longa
- Dipartimento Medicina Sperimentale, Università dell’ Aquila, 67100 L’Aquila, Italy, Laboratori Nazionali di Frascati, INFN, CP13, I-00044 Frascati, Italy, Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Department of Chemistry, Northwestern University, Evanston, Illinois 60208, Department of Chemistry, Stanford University, Stanford, California 94305-5080, Stanford Synchrotron Radiation Laboratory, SLAC, Stanford University,
| | - L. X. Chen
- Dipartimento Medicina Sperimentale, Università dell’ Aquila, 67100 L’Aquila, Italy, Laboratori Nazionali di Frascati, INFN, CP13, I-00044 Frascati, Italy, Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Department of Chemistry, Northwestern University, Evanston, Illinois 60208, Department of Chemistry, Stanford University, Stanford, California 94305-5080, Stanford Synchrotron Radiation Laboratory, SLAC, Stanford University,
| | - P. Frank
- Dipartimento Medicina Sperimentale, Università dell’ Aquila, 67100 L’Aquila, Italy, Laboratori Nazionali di Frascati, INFN, CP13, I-00044 Frascati, Italy, Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Department of Chemistry, Northwestern University, Evanston, Illinois 60208, Department of Chemistry, Stanford University, Stanford, California 94305-5080, Stanford Synchrotron Radiation Laboratory, SLAC, Stanford University,
| | - K. Hayakawa
- Dipartimento Medicina Sperimentale, Università dell’ Aquila, 67100 L’Aquila, Italy, Laboratori Nazionali di Frascati, INFN, CP13, I-00044 Frascati, Italy, Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Department of Chemistry, Northwestern University, Evanston, Illinois 60208, Department of Chemistry, Stanford University, Stanford, California 94305-5080, Stanford Synchrotron Radiation Laboratory, SLAC, Stanford University,
| | - K. Hatada
- Dipartimento Medicina Sperimentale, Università dell’ Aquila, 67100 L’Aquila, Italy, Laboratori Nazionali di Frascati, INFN, CP13, I-00044 Frascati, Italy, Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Department of Chemistry, Northwestern University, Evanston, Illinois 60208, Department of Chemistry, Stanford University, Stanford, California 94305-5080, Stanford Synchrotron Radiation Laboratory, SLAC, Stanford University,
| | - M. Benfatto
- Dipartimento Medicina Sperimentale, Università dell’ Aquila, 67100 L’Aquila, Italy, Laboratori Nazionali di Frascati, INFN, CP13, I-00044 Frascati, Italy, Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Department of Chemistry, Northwestern University, Evanston, Illinois 60208, Department of Chemistry, Stanford University, Stanford, California 94305-5080, Stanford Synchrotron Radiation Laboratory, SLAC, Stanford University,
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Díaz-Moreno S, Chaboy J. Ab initio X-ray Absorption Spectroscopy Study of the Solvation Structure of Yttrium (III) in Dimethyl Sulfoxide. J Phys Chem B 2009; 113:3527-35. [DOI: 10.1021/jp809575g] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sofía Díaz-Moreno
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, U.K., and Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Jesús Chaboy
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, U.K., and Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
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Band A, Albu-Yaron A, Livneh T, Cohen H, Feldman Y, Shimon L, Popovitz-Biro R, Lyahovitskaya V, Tenne R. Characterization of Oxides of Cesium. J Phys Chem B 2004. [DOI: 10.1021/jp036432o] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- A. Band
- Department of Materials and Interfaces and Chemical Services Unit, Weizmann Institute of Science, Rehovot 76100, Israel
| | - A. Albu-Yaron
- Department of Materials and Interfaces and Chemical Services Unit, Weizmann Institute of Science, Rehovot 76100, Israel
| | - T. Livneh
- Department of Materials and Interfaces and Chemical Services Unit, Weizmann Institute of Science, Rehovot 76100, Israel
| | - H. Cohen
- Department of Materials and Interfaces and Chemical Services Unit, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Y. Feldman
- Department of Materials and Interfaces and Chemical Services Unit, Weizmann Institute of Science, Rehovot 76100, Israel
| | - L. Shimon
- Department of Materials and Interfaces and Chemical Services Unit, Weizmann Institute of Science, Rehovot 76100, Israel
| | - R. Popovitz-Biro
- Department of Materials and Interfaces and Chemical Services Unit, Weizmann Institute of Science, Rehovot 76100, Israel
| | - V. Lyahovitskaya
- Department of Materials and Interfaces and Chemical Services Unit, Weizmann Institute of Science, Rehovot 76100, Israel
| | - R. Tenne
- Department of Materials and Interfaces and Chemical Services Unit, Weizmann Institute of Science, Rehovot 76100, Israel
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Della Longa S, Arcovito A, Benfatto M, Congiu-Castellano A, Girasole M, Hazemann JL, Lo Bosco A. Redox-induced structural dynamics of Fe-heme ligand in myoglobin by X-ray absorption spectroscopy. Biophys J 2003; 85:549-58. [PMID: 12829509 PMCID: PMC1303110 DOI: 10.1016/s0006-3495(03)74499-3] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The Fe(III) --> Fe(II) reduction of the heme iron in aquomet-myoglobin, induced by x-rays at cryogenics temperatures, produces a thermally trapped nonequilibrium state in which a water molecule is still bound to the iron. Water dissociates at T > 160 K, when the protein can relax toward its new equilibrium, deoxy form. Synchrotron radiation x-ray absorption spectroscopy provides information on both the redox state and the Fe-heme structure. Owing to the development of a novel method to analyze the low-energy region of x-ray absorption spectroscopy, we obtain structural pictures of this photo-inducible, irreversible process, with 0.02-0.06-A accuracy, on the protein in solution as well as in crystal. After photo-reduction, the iron-proximal histidine bond is shortened by 0.15 A, a reinforcement that should destabilize the iron in-plane position favoring water dissociation. Moreover, we are able to get the distance of the water molecule even after dissociation from the iron, with a 0.16-A statistical error.
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Affiliation(s)
- S Della Longa
- Department of Experimental Medicine, Università L'Aquila, L'Aquila, Italy.
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