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Comparative study of Li(Li1/3Ti5/3)O-4 and Li(Ni1/2-xLi2x/3Tix/3)Ti3/2O4 (x=1/3) anodes for Li rechargeable batteries

Cited 27 time in Web of Science Cited 29 time in Scopus
Authors
Kim, Jongsoon; Kim, Sung-Wook; Gwon, Hyeokjo; Yoon, Won-Sub; Kang, Kisuk
Issue Date
2009-10
Citation
Electrochimica Acta, Vol.54 No.24, pp.5914-5918
Keywords
Lithium rechargeable batteryLi(Li1/3Ti5/3)O-4SpinelNi substitutionZero strain
Abstract
A solid solution of spinel (2/3)Li(Li1/3Ti5/3)O-4-(1/3)Li(Ni1/2Ti3/2)O-4 was prepared, and its structural/electrochemical properties were compared with Li(Li1/3Ti5/3)O-4 to identify the effect of doping to the structural invariance of Li(Li1/3Ti5/3)O-4. The solid solution retained the zero strain characteristic of Li(Li1/3Ti5/3)O-4 during discharge/charge with an excellent cycle stability, while the rate capability was notably improved. However, a reversible broadening of the XRD peak was observed at the end of discharge, indicating some structural changes. XANES measurements showed that the oxidation state of Ti was +4 and that of Ni was +2 in the solid solution. (C) 2009 Elsevier Ltd. All rights reserved.
ISSN
0013-4686
URI
https://hdl.handle.net/10371/165183
DOI
https://doi.org/10.1016/j.electacta.2009.05.058
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Material Science and Engineering (재료공학부) Journal Papers (저널논문_재료공학부)
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