Effect of Nb-doping on electrochemical stability of Li₄Ti₅O₁₂ discharged to 0 V
Date
2012
Authors
Tian, B.
Xiang, H.
Zhang, L.
Wang, H.
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Journal article
Citation
Journal of Solid State Electrochemistry, 2012; 16(1):205-211
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Bingbing Tian, Hongfa Xiang, Le Zhang, Haihui Wang
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Abstract
Li4Ti4.95Nb0.05O12 is synthesized by a citric acid-assistant sol–gel method. X-ray diffraction (XRD) reveals that highly crystalline Li4Ti4.95Nb0.05O12 without any impurity is obtained. The electrochemical performances of the Li4Ti4.95Nb0.05O12 and the Li4Ti5O12 in the range from 0 to 2.5 V are investigated. The Li4Ti4.95Nb0.05O12 presents a higher specific capacity and better cycling stability than the Li4Ti5O12 due to the improved conductivity. The Li4Ti4.95Nb0.05O12 exhibits a capacity as high as 231.2 mAh g−1 after 100 cycles, which is much higher than the Li4Ti5O12 (111.1 mAh g−1). The effect of Nb-doping on electrochemical performance of Li4Ti5O12 discharged to 0 V has also been discussed.
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© Springer-Verlag 2011