Shin, Ho Chul Park, Sung Bin Jang, Ho Chung, Kyung Yoon Cho, Won Il Kim, Chang Sam Cho, Byung Won 2024-01-20T22:30:41Z 2024-01-20T22:30:41Z 2021-09-03 2008-11-15 0013-4686 https://pubs.kist.re.kr/handle/201004/132977 Structural change of Cr-doped LiFePO4/C during cycling is investigated using conventional and synchrotron-based in Situ X-ray diffraction techniques. The carbon-coated and Cr-doped LiFePO4 Particles are synthesized by a mechanochemical process followed by a one-step heat treatment. The LiFe0.97Cr0.03PO4/C has shown excellent rate performance, delivering the discharge capacity Up to 120 mAh/g at 10C rate. The results suggest that the improvement of the rate performance is attributed to the chromium doping, which facilitates the phase transformation between triphylite and heterosite during cycling, and conductivity improvement by carbon coating. Structural analysis using the synchrotron source also indicates that the doped Cr replaces Fe and/or Li sites in LiFePO4. (c) 2008 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD CARBON-COATED LIFEPO4 ELECTROCHEMICAL PROPERTIES PHOSPHO-OLIVINES CATHODE MATERIAL LITHIUM Rate performance and structural change of Cr-doped LiFePO4/C during cycling Article 10.1016/j.electacta.2008.06.005 1 ELECTROCHIMICA ACTA, v.53, no.27, pp.7946 - 7951 ELECTROCHIMICA ACTA 53 27 7946 7951 scie scopus 000259470800021 2-s2.0-50049129104 Electrochemistry Electrochemistry Article CARBON-COATED LIFEPO4 ELECTROCHEMICAL PROPERTIES PHOSPHO-OLIVINES CATHODE MATERIAL LITHIUM LiFePO4 carbon coating doping in situ X-ray diffraction lithium batteries