Size-dependent phase morphologies in LiFePO4 battery particles
Lithium iron phosphate (LiFePO4) is the prototypical two-phase battery material whose complex patterns of lithium ion intercalation provide a testing ground for theories of electrochemical thermodynamics. Using a depth-averaged (a-b plane) phase-field model of coherent phase separation driven by Far...
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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Elsevier BV
2020
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| Online Access: | https://hdl.handle.net/1721.1/126447 |
| _version_ | 1826216061383475200 |
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| author | Cogswell, Daniel Aaron Bazant, Martin Z |
| author2 | Massachusetts Institute of Technology. Department of Chemical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Chemical Engineering Cogswell, Daniel Aaron Bazant, Martin Z |
| author_sort | Cogswell, Daniel Aaron |
| collection | MIT |
| description | Lithium iron phosphate (LiFePO4) is the prototypical two-phase battery material whose complex patterns of lithium ion intercalation provide a testing ground for theories of electrochemical thermodynamics. Using a depth-averaged (a-b plane) phase-field model of coherent phase separation driven by Faradaic reactions, we reconcile conflicting experimental observations of diamond-like phase patterns in micron-sized platelets with observations of surface-controlled patterns in nanoparticles. Elastic analysis predicts this morphological transition for particles whose a-axis dimension exceeds twice the bulk elastic stripe period. We also simulate a rich variety of non-equilibrium patterns, influenced by size-dependent spinodal points and electro-autocatalytic control of thermodynamic stability. |
| first_indexed | 2024-09-23T16:41:40Z |
| format | Article |
| id | mit-1721.1/126447 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T16:41:40Z |
| publishDate | 2020 |
| publisher | Elsevier BV |
| record_format | dspace |
| spelling | mit-1721.1/1264472022-09-29T20:50:20Z Size-dependent phase morphologies in LiFePO4 battery particles Cogswell, Daniel Aaron Bazant, Martin Z Massachusetts Institute of Technology. Department of Chemical Engineering Massachusetts Institute of Technology. Department of Mathematics Lithium iron phosphate (LiFePO4) is the prototypical two-phase battery material whose complex patterns of lithium ion intercalation provide a testing ground for theories of electrochemical thermodynamics. Using a depth-averaged (a-b plane) phase-field model of coherent phase separation driven by Faradaic reactions, we reconcile conflicting experimental observations of diamond-like phase patterns in micron-sized platelets with observations of surface-controlled patterns in nanoparticles. Elastic analysis predicts this morphological transition for particles whose a-axis dimension exceeds twice the bulk elastic stripe period. We also simulate a rich variety of non-equilibrium patterns, influenced by size-dependent spinodal points and electro-autocatalytic control of thermodynamic stability. 2020-07-30T02:47:12Z 2020-07-30T02:47:12Z 2018-10 2018-08 2019-08-13T17:45:25Z Article http://purl.org/eprint/type/JournalArticle 1388-2481 https://hdl.handle.net/1721.1/126447 Cogswell, Daniel A. and Martin Z. Bazant. "Size-dependent phase morphologies in LiFePO4 battery particles." Electrochemistry Communications 95 (October 2018): 33-37 © 2018 Elsevier B.V. en http://dx.doi.org/10.1016/j.elecom.2018.08.015 Electrochemistry Communications Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier BV arXiv |
| spellingShingle | Cogswell, Daniel Aaron Bazant, Martin Z Size-dependent phase morphologies in LiFePO4 battery particles |
| title | Size-dependent phase morphologies in LiFePO4 battery particles |
| title_full | Size-dependent phase morphologies in LiFePO4 battery particles |
| title_fullStr | Size-dependent phase morphologies in LiFePO4 battery particles |
| title_full_unstemmed | Size-dependent phase morphologies in LiFePO4 battery particles |
| title_short | Size-dependent phase morphologies in LiFePO4 battery particles |
| title_sort | size dependent phase morphologies in lifepo4 battery particles |
| url | https://hdl.handle.net/1721.1/126447 |
| work_keys_str_mv | AT cogswelldanielaaron sizedependentphasemorphologiesinlifepo4batteryparticles AT bazantmartinz sizedependentphasemorphologiesinlifepo4batteryparticles |