Transport and Structural Properties of Pure and Cr Doped Li3VO4
This study deals with the effects of 5 and 10% chromium additions on the transport and structural properties of Li3VO4. The Cr substitution is easily obtained without impurity phases and does not affect the room- and high-temperature host crystal structure, as evidenced by X-ray powder diffraction a...
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| Veröffentlicht in: | The journal of physical chemistry. B 2005-08, Vol.109 (31), p.14845-14851 |
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| container_end_page | 14851 |
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| container_issue | 31 |
| container_start_page | 14845 |
| container_title | The journal of physical chemistry. B |
| container_volume | 109 |
| creator | Massarotti, V Capsoni, D Bini, M Mustarelli, P Chiodelli, G Azzoni, C. B Galinetto, P Mozzati, M. C |
| description | This study deals with the effects of 5 and 10% chromium additions on the transport and structural properties of Li3VO4. The Cr substitution is easily obtained without impurity phases and does not affect the room- and high-temperature host crystal structure, as evidenced by X-ray powder diffraction and micro-Raman analysis. The EPR signals are interpreted in terms of quantified amounts of Cr ions in 5+ and 3+ valence states. Suitable 7Li and 51V MAS NMR spectra simulations agree with the EPR results about the relative amount of Cr5+ and Cr3+ ions substituted in V5+ and Li+ sites, respectively. The Cr3+ presence on Li site, also suggested by Raman results and Rietveld refinements, requires Li vacancies to maintain the charge neutrality. The p-type conductivity, suggested by the positive thermoelectric power coefficients, significantly increases by the cation doping up to an order of magnitude. |
| doi_str_mv | 10.1021/jp051166v |
| format | Article |
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The Cr3+ presence on Li site, also suggested by Raman results and Rietveld refinements, requires Li vacancies to maintain the charge neutrality. The p-type conductivity, suggested by the positive thermoelectric power coefficients, significantly increases by the cation doping up to an order of magnitude.</description><issn>1520-6106</issn><issn>1520-5207</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><recordid>eNo9kF1LwzAYhYMobk4v_APSG72rJmk-liuR-U1hk013GZImgc6urUkr-u-Nbu7i5Rw4Dy-cA8ApgpcIYnS1aiFFiLHPPTBEFMM0Ht_feoYgG4CjEFYQYorH7BAMEBtHx8UQXC-8qkPb-C5RtUnmne-LrveqSma-aa3vShuSxiWz3ts_YuKT2xiYJC-ztyk5BgdOVcGebHUEXu_vFpPHNJ8-PE1u8lRhnnUpE8hoUTiixRhj67BijFKtleCIQq6IEDgjxBnMLKeGEm2oc4hh55ig2mUjcLH52_rmo7ehk-syFLaqVG2bPkgOEaeQ8AiebcFer62RrS_Xyn_L_8oRSDdAGTr7tcuVf5eMZ5zKxWwuaU6WePnyLOeRP9_wqghy1fS-jj0lgvJ3ermbPvsBlixw_w</recordid><startdate>20050811</startdate><enddate>20050811</enddate><creator>Massarotti, V</creator><creator>Capsoni, D</creator><creator>Bini, M</creator><creator>Mustarelli, P</creator><creator>Chiodelli, G</creator><creator>Azzoni, C. 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The Cr substitution is easily obtained without impurity phases and does not affect the room- and high-temperature host crystal structure, as evidenced by X-ray powder diffraction and micro-Raman analysis. The EPR signals are interpreted in terms of quantified amounts of Cr ions in 5+ and 3+ valence states. Suitable 7Li and 51V MAS NMR spectra simulations agree with the EPR results about the relative amount of Cr5+ and Cr3+ ions substituted in V5+ and Li+ sites, respectively. The Cr3+ presence on Li site, also suggested by Raman results and Rietveld refinements, requires Li vacancies to maintain the charge neutrality. The p-type conductivity, suggested by the positive thermoelectric power coefficients, significantly increases by the cation doping up to an order of magnitude.</abstract><cop>United States</cop><pub>American Chemical Society</pub><pmid>16852879</pmid><doi>10.1021/jp051166v</doi><tpages>7</tpages></addata></record> |
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| title | Transport and Structural Properties of Pure and Cr Doped Li3VO4 |
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