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

✍ Scribed by Jongsoon Kim; Sung-Wook Kim; Hyeokjo Gwon; Won-Sub Yoon; Kisuk Kang

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
673 KB
Volume
54
Category
Article
ISSN
0013-4686

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✦ Synopsis

Lithium rechargeable battery

Li(Li 1/3 Ti 5/3 )O4 Spinel Ni substitution Zero strain a b s t r a c t A solid solution of spinel (2/3)Li(Li 1/3 Ti 5/3 )O 4 -(1/3)Li(Ni 1/2 Ti 3/2 )O 4 was prepared, and its structural/electrochemical properties were compared with Li(Li 1/3 Ti 5/3 )O 4 to identify the effect of doping to the structural invariance of Li(Li 1/3 Ti 5/3 )O 4 . The solid solution retained the zero strain characteristic of Li(Li 1/3 Ti 5/3 )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.

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