Title Accelerated removal of Fe-antisite defects while nanosizing hydrothermal $LiFePO_{4}$ with $Ca^{2+}$Accelerated removal of Fe-antisite defects while nanosizing hydrothermal $LiFePO_{4}$ with $Ca^{2+}$ Author Paolella, Andrea Turner, Stuart Bertoni, Giovanni et al. Faculty/Department Faculty of Sciences. Physics Research group Electron microscopy for materials research (EMAT) Publication type article Publication 2016Washington, 2016 Subject Physics Chemistry Engineering sciences. Technology Source (journal) Nano letters / American Chemical Society. - Washington Volume/pages 16(2016):4, p. 2692-2697 ISSN 1530-6984 ISI 000374274600084 Carrier E Target language English (eng) Full text (Publishers DOI) Affiliation University of Antwerp Abstract 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. E-info http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000374274600084&DestLinkType=RelatedRecords&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000374274600084&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 Handle