Xiaofei Liu, Shengfu Tong, Chenguang Dai
2014
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0
Influential Citations
7
Citations
Journal
Journal of Solid State Electrochemistry
Abstract
A low-cost and facile method for synthesizing micro-size lithium titanium oxide, micro-size Li4Ti5O12 (MS-LTO), has been proposed in this study. The MS-LTO with a high tap density of 1.38 g cm−3 is prepared from synthesis-grade TiOSO4 through hydrolysis followed by calcination of obtained TiO2 with LiOH · H2O. The parameters of pH, temperature, concentration, etc. are optimized for preparing the precursor H2TiO3. The morphology, size, and structure of H2TiO3, TiO2, and MS-LTO are carefully characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The electrochemical performances of the as-prepared MS-LTO deliver a reversible capacity of 171 mA · h g−1 at 0.1 C and show a good rate capability by maintaining 47 % of the capacity at 5 C (vs. 0.1 C), as well as remarkable cycling stability without capacity fading after 100 cycles at both 1 and 2 C. This as-prepared MS-LTO shows a potential application in lithium-ion batteries which can be utilized in the next-generation electric vehicles and hybrid electric vehicles. Furthermore, the strategy for synthesizing MS-LTO from production-level TiOSO4 · xH2SO4 · xH2O proposed here provides a facile method for preparing lithium-ion anode materials.