Lithium Insertion in Carbon Nanotubes
Lithium Insertion in Carbon Nanotubes
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DOI：
10.1080/10587250008025523
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发表时间：
2000-03
期刊：
影响因子：
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通讯作者：
F. Béguin;Karine Metenier-;R. Pellenq;S. Bonnamy;E. Frąckowiak
中科院分区：
文献类型：
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作者：
F. Béguin;Karine Metenier-;R. Pellenq;S. Bonnamy;E. Frąckowiak
摘要以氧化铝为模板，通过乙炔催化分解和丙烯热解制备了不同类型的多壁碳纳米管，并研究了其在非质子介质中的储锂性能。样品呈现出高的锂可逆存储容量，范围从350 mAh/g到780 mAh/g，这取决于它们的物理化学特性。已经发现，纳米管的介孔特性是负责插入和提取锂之间的重要过电压。特别是由柔性纳米管的缠结产生的膨胀中孔，促进了双电层的充电。这有助于在相对于Li从IV至3V的范围内观察到的重要可逆容量（高达580 mAh/g）。另一方面，溶剂化的锂阳离子容易穿透中孔，并且溶剂分子在碳表面分解，形成固体电解质界面（SEI）。这是从570 mAh/g到1080 mAh/g的重要不可逆容量的起源。由于它们的伪电容特性。这些纳米管作为电化学电容器的电极材料是非常有前途的。
Abstract Different types of multi-walled carbon nanotubes obtained by catalytic decomposition of acetylene or pyrolysis of propylene on an alumina template have been investigated for lithium storage in aprotic medium. The samples presented a high reversible storage capacity of lithium, ranging from 350 mAh/g to 780 mAh/g, depending on their physico-chemical characteristics. It has been found that the mesoporous character of the nanotubes is responsible for an important overvoltage between insertion and extraction of lithium. Especially swelling mesopores, created by the entanglement of flexible nanotubes, facilitate charging of an electrical double layer. This contributes to the important reversible capacity observed in the range from 1 V to 3 V vs Li (up to 580 mAh/g). On the other hand, solvated lithium cations easily penetrate the mesopores and the solvent molecules are decomposed at the carbon surface forming the solid electrolyte interphase (SEI). That is at the origin of the important irreversible capacity ranging from 570 mAh/g to 1080 mAh/g. Due to their pseudo-capacitance properties. these nanotubes are very promising as electrode materials of electrochemical capacitors.