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Title
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Accelerated removal of Fe-antisite defects while nanosizing hydrothermal with
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Author
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Abstract
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| Based on neutron powder diffraction (NPD) and high angle annular dark field scanning transmission electron microscopy (HAADF-STEM), we show that calcium ions help eliminate the Fe-antisite defects by controlling the nucleation and evolution of the LiFePO4 particles during their hydrothermal synthesis. This Ca-regulated formation of LiFePO4 particles has an overwhelming impact on the removal of their iron antisite defects during the subsequent carbon coating step since (i) almost all the Fe-antisite defects aggregate at the surface of the LiFePO4 crystal when the crystals are small enough and (ii) the concomitant increase of the surface area, which further exposes the Fe-antisite defects. Our results not only justify a low-cost, efficient and reliable hydrothermal synthesis method for LiFePO4 but also provide a promising alternative viewpoint on the mechanism controlling the nanosizing of LiFePO4, which leads to improved electrochemical performances. |
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Language
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English
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Source (journal)
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Nano letters / American Chemical Society. - Washington
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Publication
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Washington
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2016
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ISSN
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1530-6984
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DOI
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10.1021/ACS.NANOLETT.6B00334
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Volume/pages
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16
:4
(2016)
, p. 2692-2697
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ISI
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000374274600084
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Pubmed ID
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26966938
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Full text (Publisher's DOI)
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Full text (open access)
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