Crumpled N-Doped Carbon Nanotubes Encapsulated with Peapod-Like Ge Nanoparticles for High-Rate and Long-Life Li-ion Battery Anodes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Kaifu Huo
  • Lei Wang
  • Changjian Peng
  • Yuanyuan Li
  • Qingwei Li
  • Zhenzhen Jin

Detail(s)

Original languageEnglish
Pages (from-to)7585-7590
Journal / PublicationJournal of Materials Chemistry A
Volume4
Issue number20
Publication statusPublished - 28 May 2016

Abstract

Germanium (Ge) is a promising anode material for lithium-ion batteries (LIBs) because of its high theoretical specific capacity of 1620 mA h g−1. However, the large volume change during Li alloying/dealloying causes cracking and pulverization of the Ge anodes leading to rapid fading of the capacity. Herein, we report a novel peapod-like Ge/N-doped carbon (Ge/CNx) as a high-performance anode material for LIBs, in which isolated Ge nanoparticles are incorporated into crumpled CNx nanotubes. The peapod-like Ge/CNx not only provides enough voids to accommodate the volume expansion of pea-like Ge NPs during the Li–Ge alloy reactions, but also offers a continuous conducting framework for electron transport and accessible nanoporous channels for fast diffusion and transport of Li+ ions. This 0D-in-1D peapod-like Ge/CNx nanomaterial possesses a stable discharge capacity of 1080 mA h g−1 over 1200 cycles at a 0.5C rate (1C = 1600 mA g−1) and 62.3% capacity retention when the current density is increased 16 times from 0.5 to 8C, enabling promising applications in high-performance LIBs.

Citation Format(s)

Crumpled N-Doped Carbon Nanotubes Encapsulated with Peapod-Like Ge Nanoparticles for High-Rate and Long-Life Li-ion Battery Anodes. / Huo, Kaifu; Wang, Lei; Peng, Changjian; Peng, Xiang; Li, Yuanyuan; Li, Qingwei; Jin, Zhenzhen; Chu, Paul K.

In: Journal of Materials Chemistry A, Vol. 4, No. 20, 28.05.2016, p. 7585-7590.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review