A simple and efficient one-pot synthesis of SiO2 nanotubes with stable structure and controlled aspect ratios for anode materials of lithium-ion batteries
A simple and efficient one-pot synthesis of SiO2 nanotubes with stable structure and controlled aspect ratios for anode materials of lithium-ion batteries
复制标题
简单高效的一锅法合成结构稳定、长径比受控的SiO2纳米管，用于锂离子电池负极材料
DOI：
10.1007/s11581-019-03246-4
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发表时间：
2020
期刊：
影响因子：
2.8
通讯作者：
Xie Yanfang
中科院分区：
文献类型：
--
作者：
Tang Jie;Dai Xinyi;Wu Fuzhong;Mai Yi;Wang Xiao;Jin Huixin;Gu Yijing;Xie Yanfang
具有纳米管结构的材料由于具有良好的结构稳定性、高比表面积、内外壁活性等优点，在电化学储能领域引起了广泛的关注。在这里，我们报告了一个简单而有效的一锅法合成SiO2纳米管与控制纵横比。考察了单体浓度、反应时间等工艺参数对长径比的影响。结果表明，在加入正硅酸乙酯之前，SiO2纳米管的长径比随着反应时间的延长而增加，而通过调节水合肼/NiCl 2的比例，SiO2纳米管的长度也可以改变。作为锂离子电池负极材料的SiO2纳米管表现出625.5 mAh g-1的初始放电容量，在40 mA/g下100次循环后保持232.5 mAh g-1，相对于第二次循环为75.7%，显示出良好的电化学性能。
Materials with nanotubular structure have attracted wide attention in electrochemical energy storage due to their good structural stability, high specific surface area, and internal and external wall activity. Here, we report a simple and efficient one-pot method for the synthesis of SiO2 nanotubes with controlled aspect ratios. The influence of parameters, such as the monomer concentration and reaction time on the aspect ratio, were inspected systematically. The results confirmed that the aspect ratio of SiO2 nanotubes increases with the reaction time before tetraethyl orthosilicate is added, and the length of SiO2 nanotubes can also be altered by tuning the hydrazine hydrate/NiCl2 ratio. The SiO2 nanotubes as an anode material for lithium-ion batteries exhibited an initial discharge capacity of 625.5 mAh g−1 and maintained 232.5 mAh g−1 after 100 cycles at 40 mA/g, which is 75.7% relative to the second cycle, showing good electrochemical performance.