A novel germanium/carbon nanotubes nanocomposite for lithium storage material

被引：71

作者：

Cui, Guanglei ^{[1
]}

Gu, Lin ^{[2
]}

Kaskhedikar, Nitin ^{[1
]}

van Aken, Peter A. ^{[2
]}

Maier, Joachim ^{[1
]}

机构：

[1] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany

[2] Max Planck Inst Met Res, D-70569 Stuttgart, Germany

来源：

ELECTROCHIMICA ACTA | 2010年 / 55卷 / 03期

关键词：

Carbon nanotube; Germanium; Anode; Nanostructure; CARBON NANOTUBES; ION BATTERIES; NATURAL GRAPHITE; ANODE MATERIAL; SOLID LITHIUM; COMPOSITES; INTERCALATION; PERFORMANCE; ELECTRODES; TIN;

D O I：

10.1016/j.electacta.2009.08.056

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A new nanocomposite of Ge/carbon nanotubes (n-Ge/CNTs) was reported by a facile precursor method through a pyrolysis technique. Among it, germanium nanoparticles are encapsulated with a thin layer of amorphous carbon, which benefits to keep a good electronic contact with carbon nanotubes. Germanium nanoparticles are mainly supported inside the carbon nanotubes, which can effectively buffer the volume changes of Germanium. The composite was an effectively mixed (Li+ and e(-)) conducting network, which is vital to a quick Li insertion. The composite was shown to exhibit a reversible capacity of about 750 mAh g(-1) (74.4 m Ag-1) and an improved rate performance, compared with that of CNTs processed as the same condition. Our results demonstrated the composite to be a good active Li-storage material for Li batteries. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：985 / 988

页数：4

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