| Columnar order in jammed LiFePO(4) cathodes: ion transport catastrophe and its mitigation. | |
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MedLine Citation:
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PMID: 22476114 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The high-rate, high-capacity potential of LiFePO(4)-based lithium-ion battery cathodes has motivated numerous experimental and theoretical studies aiming to realize such performance through nano-sizing, tailoring of particle shape through synthesis conditions, and doping. Here, a granular mechanics study of microstructures formed by dense jammed packings of experimentally and theoretically inspired LiFePO(4) particle shapes is presented. A strong dependence of the resultant packing structures on particle shapes is observed, in which columnar structures aligned with the [010] direction inhibit diffusion along [010] in anisotropic LiFePO(4). Transport limitations are induced by [010] columnar order and lead to catastrophic performance degradation in anisotropic LiFePO(4) electrodes. Further, judicious mixing of nanoplatelets with additive nanoparticles can frustrate columnar ordering and thereby enhance the rate capability of LiFePO(4) electrodes by nearly an order of magnitude. |
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Authors:
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Kyle C Smith; Partha P Mukherjee; Timothy S Fisher |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-4-4 |
Journal Detail:
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Title: Physical chemistry chemical physics : PCCP Volume: - ISSN: 1463-9084 ISO Abbreviation: - Publication Date: 2012 Apr |
Date Detail:
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Created Date: 2012-4-5 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100888160 Medline TA: Phys Chem Chem Phys Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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School of Mechanical Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47907, USA. tsfisher@purdue.edu. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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