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http://dx.doi.org/10.4191/kcers.2012.49.6.659

Preparation of Spherical Li4Ti5O12 and the Effect of Y and Nb Doping on the Electrochemical Properties as Anode Material for Lithium Secondary Batteries  

Ji, Mi-Jung (Electronic Materials Laboratory, Korea Institute of Ceramic Engineering & Technology)
Kwon, Yong-Jin (Electronic Materials Laboratory, Korea Institute of Ceramic Engineering & Technology)
Kim, Eun-Kyung (Electronic Materials Laboratory, Korea Institute of Ceramic Engineering & Technology)
Park, Tae-Jin (Electronic Materials Laboratory, Korea Institute of Ceramic Engineering & Technology)
Jung, Sung-Hun (Electronic Materials Laboratory, Korea Institute of Ceramic Engineering & Technology)
Choi, Byung-Hyun (Electronic Materials Laboratory, Korea Institute of Ceramic Engineering & Technology)
Publication Information
Journal of the Korean Ceramic Society / v.49, no.6, 2012 , pp. 659-662 More about this Journal
Abstract
Yttrium (Y) and niobium (Nb) doped spherical $Li_4Ti_5O_{12}$ were synthesized to improve the energy density and electrochemical properties of anode material. The synthesized crystal was $Li_4Ti_5O_{12}$, the particle size was less than $1{\mu}m$ and the morphology was spherical and well dispersed. The Y and Nb optimal doping amounts were 1 mol% and 0.5 mol%, respectively. The initial capacity of the dopant discharge and charge capacity were respectively 149mAh/g and 143 mAh/g and were significantly improved compared to the undoped condition at 129 mAh/g. Also, the capacity retention of 0.2 C/5 C was 74% for each was improved to 94% and 89%. It was consequently found that Y and Nb doping into the $Li_4Ti_5O_{12}$ matrix reduces the polarization and resistance of the solid electrolyte interface (SEI) layer during the electrochemical reaction.
Keywords
Spherical $Li_4Ti_5O_{12}$; Doping; Li-ion battery;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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