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Impact of titanium precursors on formation and electrochemical properties of Li 4 Ti 5 O 12 anode materials for lithium-ion batteries
Journal of Solid State Electrochemistry ( IF 2.5 ) Pub Date : 2020-10-03 , DOI: 10.1007/s10008-020-04831-8
Chung-Yuan Kang , Marcin Krajewski , Jeng-Yu Lin

This work describes comparative study on the application of Li4Ti5O12 (LTO) as anode materials for lithium-ion batteries which were successfully prepared by sol-gel synthesis with the use of two titanium sources. One of them was anatase-type titanium dioxide (TiO2), whereas the second was tetrabutyl titanate (TBT). Both obtained LTO materials were very similar in terms of their crystallinity and purity. In turn, the sample synthetized with TBT source revealed better particle dispersibility, and its particles were slightly lower in size. These particular features resulted in higher Li+ diffusion coefficient and better kinetic of Li+ ions during charge transfer reactions for the LTO synthetized with TBT source. This reflected in specific capacitance values for both electrodes which equalled 150 mAh g−1, 120 mAh g−1, and 63 mAh g−1 for TBT-LTO and 120 mAh g−1, 80 mAh g−1, and 58 mAh g−1 for TiO2-LTO at C-rates of 1, 5, and 10 C, respectively.



中文翻译:

钛前体对锂离子电池Li 4 Ti 5 O 12负极材料的形成和电化学性能的影响

这项工作描述了将Li 4 Ti 5 O 12(LTO)用作锂离子电池负极材料的比较研究,该锂离子电池是通过使用两种钛源通过溶胶-凝胶合成成功制备的。其中之一是锐钛矿型二氧化钛(TiO 2),而第二个是钛酸四丁酯(TBT)。两种获得的LTO材料的结晶度和纯度都非常相似。反过来,用TBT源合成的样品显示出更好的颗粒分散性,并且其颗粒尺寸略小。这些特殊的特征导致更高的Li +扩散系数和更好的Li +动力学与TBT源合成的LTO在电荷转移反应过程中产生的离子。这反映为两个电极的比电容值,对于TBT-LTO分别等于150 mAh g -1,120 mAh g -1和63 mAh g -1以及120 mAh g -1,80 mAh g -1和58 mAh g TiO 2 -LTO的C速率分别为1、5和10 C时为-1

更新日期:2020-10-04
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