Preparation and lithium intercalation behavior of TiO2 in aqueous solutions
Preparation and lithium intercalation behavior of TiO2 in aqueous solutions
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TiO2的制备及其在水溶液中的嵌锂行为
DOI：
10.1016/j.materresbull.2013.12.028
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发表时间：
2014-04
影响因子：
5.4
通讯作者：
Xuanyu Wang
中科院分区：
文献类型：
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作者：
Yunjiao Li*, Lin Li, Lingpeng Chen, Cang Xu;Xuanyu Wang
在45 °C、不同pH条件下，通过TiCl 4水解制备了低晶型或无定形TiO 2。在较低pH值（1.23-3.10）下得到的产物为纳米级颗粒，结晶性差，粒径分布均匀;而在pH值4.10下得到的产物结晶性差，规则形貌开始消失;在较高pH值（>6.00）下得到的产物为无定形和不规则形貌。将在pH 2.60和8.80下获得的水解产物分别在300、400、600、700和800 °C下热处理3 h，以计算相变。观察到了相变过程的差异，验证了性能的差异。研究了所得TiO 2的嵌锂性能。结果表明，在较低pH值下制备的TiO 2更有利于嵌锂，是较好的嵌锂前驱体。
The low crystalline or amorphous TiO2was prepared by TiCl4hydrolysis in aqueous solutions under different pH conditions at 45 °C. The products obtained at lower pH (1.23–3.10) appear to be nano-sized particles with poor crystalline anatase structure and an uniform particle size distribution, while the product prepared at pH 4.10 presents in a poor crystalline anatase structure and the regular morphology starts to disappear, and the products obtained at higher pH (>6.00) are amorphous and irregular morphology. The hydrolysis products obtained at pH 2.60 and 8.80 were heat-treated at 300, 400, 600, 700 and 800 °C for 3 h, respectively, to figure out the phase transition. The differences in phase transition process were observed, which verified the properties difference. The lithium intercalation abilities of the obtained TiO2were studied. The results indicated that the TiO2obtained at lower pH are more favorable for lithium intercalation and are better precursors.
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