Determination of the synthesis diagram of sodium cobalt oxide and electrochemical study
Thesis: S.M., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2014.
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| Other Authors: | |
| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2014
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| Online Access: | http://hdl.handle.net/1721.1/89985 |
| _version_ | 1826189502111023104 |
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| author | Lei, Yuechuan |
| author2 | Gerbrand Ceder. |
| author_facet | Gerbrand Ceder. Lei, Yuechuan |
| author_sort | Lei, Yuechuan |
| collection | MIT |
| description | Thesis: S.M., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2014. |
| first_indexed | 2024-09-23T08:15:46Z |
| format | Thesis |
| id | mit-1721.1/89985 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T08:15:46Z |
| publishDate | 2014 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/899852019-04-09T17:39:04Z Determination of the synthesis diagram of sodium cobalt oxide and electrochemical study Lei, Yuechuan Gerbrand Ceder. Massachusetts Institute of Technology. Department of Materials Science and Engineering. Massachusetts Institute of Technology. Department of Materials Science and Engineering. Materials Science and Engineering. Thesis: S.M., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2014. Cataloged from PDF version of thesis. Page 53 blank. Includes bibliographical references (pages 51-52). A complete and uniform synthesis diagram of NaxCoO₂ has been proposed based on forty-one samples synthesized at various temperatures from 450°C to 750°C by solid-state reactions with initial Na:Co ratio ranging from 0.60 to 1.05. Four monophasic domains of' O3, O3', P3' and P2 and four biphasic regions were revealed based on an XRD analysis. The sodium contents in these phases were determined according to the d00j-x relations obtained by an in situ XRD experiment and it is found O3, O3' and P3' phase almost form with only one stoichiometry, that is x=1.00, 0.83 and 0.67 respectively, by solid-state reaction while P2 phase forms in a slightly larger composition range from 0.68 to 0.76. Galvanostatic charging on O3-Na₁.₀₀CoO₂ battery reveals several plateaus and steep steps on the voltage curve, the corresponding phase transitions and solid solution behaviors were studied by a simultaneous in situ XRD experiment. The composition driven structural evolution in three layer NaXCoO₂ follows the sequence: O3-O3'-P3'-P3-P3', with a generally increased interslab distance d₀₀l. by Yuechuan Lei. S.M. 2014-09-19T21:32:41Z 2014-09-19T21:32:41Z 2014 2014 Thesis http://hdl.handle.net/1721.1/89985 890130367 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 53 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Materials Science and Engineering. Lei, Yuechuan Determination of the synthesis diagram of sodium cobalt oxide and electrochemical study |
| title | Determination of the synthesis diagram of sodium cobalt oxide and electrochemical study |
| title_full | Determination of the synthesis diagram of sodium cobalt oxide and electrochemical study |
| title_fullStr | Determination of the synthesis diagram of sodium cobalt oxide and electrochemical study |
| title_full_unstemmed | Determination of the synthesis diagram of sodium cobalt oxide and electrochemical study |
| title_short | Determination of the synthesis diagram of sodium cobalt oxide and electrochemical study |
| title_sort | determination of the synthesis diagram of sodium cobalt oxide and electrochemical study |
| topic | Materials Science and Engineering. |
| url | http://hdl.handle.net/1721.1/89985 |
| work_keys_str_mv | AT leiyuechuan determinationofthesynthesisdiagramofsodiumcobaltoxideandelectrochemicalstudy |