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Preparation of TiO2-(B)/SnO2 nanostructured composites and its performance as anodes for lithium-ion batteries
Journal of Materials Research ( IF 2.7 ) Pub Date : 2020-09-14 , DOI: 10.1557/jmr.2020.213
Nayely Pineda-Aguilar , Margarita Sánchez-Domínguez , Eduardo M. Sánchez-Cervantes , Lorena L. Garza-Tovar

TiO2-(B)/SnO2 nanostructured composites have been prepared by the combination of an oil-in-water (O/W) microemulsion reaction method (MRM) and a hydrothermal method. Its electrochemical properties were investigated as anode materials in lithium-ion battery, and characterization was carried out by XRD, BET, Raman, FE-SEM, EDXS, and TEM. The as-prepared composites consisted of monoclinic phase TiO2-(B) nanoribbons decorated with cassiterite structure SnO2 nanoparticles. The electrochemical performance of the TiO2-(B)/SnO2 50/50 nanocomposite electrode showed higher reversible capacity of 265 mAh/g than that of the pure SnO2 electrode, 79 mAh/g, after 50 cycles at 0.1 C in a voltage range of 0.01-3.0 V at room temperature. In addition, the coulombic efficiency of the TiO2-(B)/SnO2 50/50 nanocomposite remains at an average greater than 90% from the 2nd to the 50th cycles. The TiO2-(B)/SnO2 50/50 nanocomposite presented the best balance between the mechanical support effect provided by TiO2-(B) that also contributes to the LIB capacity and the SnO2 that provides high specific capacity.



中文翻译:

TiO 2-(B)/ SnO 2纳米复合材料的制备及其作为锂离子电池负极的性能

TiO 2-(B)/ SnO 2纳米结构复合材料是通过水包油(O / W)微乳液反应法(MRM)和水热法相结合制备的。研究了其作为锂离子电池负极材料的电化学性能,并通过XRD,BET,拉曼,FE-SEM,EDXS和TEM对其进行了表征。制备的复合材料由装饰有锡石结构SnO 2纳米粒子的单斜相TiO 2-(B)纳米带组成。TiO 2-(B)/ SnO 2 50/50纳米复合电极的电化学性能显示比纯SnO 2更高的265 mAh / g可逆容量室温下在0.01-3.0 V的电压范围内于0.1 C下进行50次循环后,电极容量为79 mAh / g。另外,TiO 2-(B)/ SnO 2 50/50纳米复合材料的库伦效率从第二个循环到第50个循环平均保持大于90%。TiO 2-(B)/ SnO 2 50/50纳米复合材料在TiO 2-(B)提供的机械支持效果(也有助于LIB容量)和提供高比容量的SnO 2之间达到了最佳平衡。

更新日期:2020-09-28
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