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Study on structure and electrochemical properties of carbon-coated monoclinic Li3V2(PO4)(3) using synchrotron based in situ X-ray diffraction and absorption

Cited 35 time in Web of Science Cited 36 time in Scopus
Authors
Yoon, Jeongbae; Muhammad, Shoaib; Jang, Donghyuk; Sivakumar, N.; Kim, Jaeyoon; Jang, Won-Hee; Lee, Yun-Sung; Park, Young-Uk; Kang, Kisuk; Yoon, Won-Sub
Issue Date
2013-08
Citation
Journal of Alloys and Compounds, Vol.569, pp.76-81
Keywords
Lithium batteryCathode materialsLithium vanadium phosphateIn situ XRDIn situ XAS
Abstract
Monoclinic Li3V2(PO4)(3), is a highly promising cathode material for lithium-ion rechargeable batteries. It has good ion mobility and high lithium capacity due to its ability to reversibly extract all three lithium ions. Here, we present, a systematic investigation of phase transitions and volume variations that occur during lithium extraction from the carbon-coated monoclinic phase of Li3V2(PO4)(3) by synchrotron based in situ X-ray diffraction and X-ray absorption spectroscopy. This monoclinic Li3V2(PO4)(3) illustrates complex behavior of four successive two-phase transitions upon extraction of all three lithium ions between 3.0 and 4.8 V vs. Li/Li+. Each XRD pattern of the intermediate compositions can be fully indexed in the monoclinic space group P2(1)/n, with net volume reduction of 6.47%. In situ V K-edge XANES in combination with study of structural parameters is applied to find the vanadium valence state at plateau regions, which highlights the variations in electrochemical potential constraining to extraction of lithium ion from different crystal sites. (C) 2013 Elsevier B. V. All rights reserved.
ISSN
0925-8388
URI
https://hdl.handle.net/10371/165120
DOI
https://doi.org/10.1016/j.jallcom.2013.03.188
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Materials Science and Engineering (재료공학부)Journal Papers (저널논문_재료공학부)
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