From Paper to Paper-like Hierarchical Anatase TiO2 Film Electrode for High-Performance Lithium-Ion Batteries
From Paper to Paper-like Hierarchical Anatase TiO2 Film Electrode for High-Performance Lithium-Ion Batteries
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DOI：
10.1021/jp305744c
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发表时间：
2012-08
影响因子：
3.7
通讯作者：
Bote Zhao;Zongping Shao
中科院分区：
文献类型：
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作者：
Bote Zhao;Zongping Shao
采用滤纸模板法结合深度水解处理工艺，设计并制备了一种由分级介孔TiO 2组成的纸状自支撑膜电极。分级介孔TiO 2的比表面积增加到155.6 m2 g-1相比，没有额外的深度水解的样品，这是只有16.0 m2 g-1。结果与球形堆积的简单模型一致，这表明丰富的中孔来自由TiO 2堆积产生的空隙空间。将该薄膜作为无粘结剂电极应用于锂离子电池中，表现出良好的倍率性能，即使在20 C的高倍率下，容量仍为100 mA h g-1。通过循环伏安法和计算研究了Li+的插入/拔出反应和电容效应对容量的贡献。随着扫描速率从0.1增加到10 mV s-1，电容效应的贡献从0.1增加到10 mV s-1。
A paper-like self-standing film electrode composed of hierarchical mesoporous anatase TiO2 was designed and prepared through a facile route of filter paper templating in combination with an additional deep hydrolysis treatment process. The specific surface area of hierarchical mesoporous TiO2 increased to 155.6 m2 g–1 compared to the sample without the additional deep hydrolysis, which is only 16.0 m2 g–1. The results are consistent with a simple model of sphere stacking which suggests that the rich mesopores were from the void space created by the TiO2 stacking. By applying such film as binder-free electrode in lithium-ion batteries (LIBs), good rate performance was demonstrated, and the capacity was still 100 mA h g–1 even at the high rate of 20 C. The contributions of Li+ insertion/extraction reaction and capacitive effect on the capacities were investigated by cyclic voltammetry and calculation. With the sweep rate increased from 0.1 to 10 mV s–1, the contributions of capacitive effects increased from...