TiO2 rutile—An alternative anode material for safe lithium-ion batteries
TiO2 rutile—An alternative anode material for safe lithium-ion batteries
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DOI：
10.1016/j.jpowsour.2010.09.109
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发表时间：
2011-08
影响因子：
9.2
通讯作者：
M. Pfanzelt;P. Kubiak;Meike Fleischhammer;M. Wohlfahrt‐Mehrens
中科院分区：
文献类型：
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作者：
M. Pfanzelt;P. Kubiak;Meike Fleischhammer;M. Wohlfahrt‐Mehrens
采用电化学方法和热分析方法研究了金红石型纳米TiO2的性质。该材料显示出高容量、高倍率性能和优异的循环稳定性。通过热分析可以清楚地证明金红石焊条的安全性。锂化金红石电极表现出放热反应，能量释放非常小，它们主要与表面膜（SEI）分解有关。的阻抗谱强烈表明表面膜的形成，但电荷转移和SEI形成的电子能谱不能解决在任何电位。此外，一种新的袋式电池的设计，这是适合于在原位测量，如FTIR，拉曼和XRD的介绍，其效率是通过在原位光学显微镜证明。
We investigate the properties of nanosized TiO2rutile by electrochemical methods and thermal analysis. The material shows a high capacity, high rate performance and excellent cycling stability. We can clearly prove the safer character of rutile electrodes by thermal analysis. The lithiated rutile electrodes exhibit exothermic reactions with a very small energy release and they are mainly related to surface film (SEI) decomposition. The impedance spectra strongly indicate the formation of a surface film, but the semicircles of charge transfer and SEI formation cannot be resolved at any potential. In addition a new pouch cell design which is suitable for in situ measurements such as FTIR, Raman and XRD is introduced and its efficiency is proven by in situ optical microscopy.