Electrochemical Insertion and Extraction of Lithium Ion at Uniform Nanosized Li4/3Ti5/3O4 Particles Prepared by a Spray Pyrolysis Method
Electrochemical Insertion and Extraction of Lithium Ion at Uniform Nanosized Li4/3Ti5/3O4 Particles Prepared by a Spray Pyrolysis Method
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DOI：
10.1021/cm047848x
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发表时间：
2005-03
影响因子：
8.6
通讯作者：
T. Doi;Y. Iriyama;T. Abe;Z. Ogumi
中科院分区：
文献类型：
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作者：
T. Doi;Y. Iriyama;T. Abe;Z. Ogumi
首次采用电喷雾热解法在673 K下制备了尖晶石Li4/3Ti5/3O4纳米颗粒。 TEM观察表明所得颗粒相当均匀并且颗粒尺寸约为。 12 nm，晶型明确。由于锂离子在纳米级 Li4/3Ti5/3O4 上的嵌入和脱嵌，循环伏安法在 1.56 V 左右（相对于 Li/Li+）给出了非常尖锐且对称的氧化还原峰。这些结果表明，通过使用均匀的纳米尺寸颗粒可以实现锂离子的表观快速扩散。
Nanosized particles of spinel Li4/3Ti5/3O4 were prepared at 673 K by an electrospray pyrolysis method for the first time. TEM observation clarified that the resultant particles were fairly uniform and that the particle sizes were ca. 12 nm with well-defined crystal form. Cyclic voltammetry gave very sharp and symmetrical redox peaks at around 1.56 V vs Li/Li+ due to the insertion and extraction of lithium ion at the nanosized Li4/3Ti5/3O4. These results indicate that the apparent fast diffusion of lithium ion can be attained by using uniform nanosized particles.