Jump to main content
Jump to site search

Issue 24, 2016
Previous Article Next Article

Rational synthesis of carbon-coated hollow Ge nanocrystals with enhanced lithium-storage properties

Author affiliations

Abstract

High-capacity anode materials based on alloy-type group IV elements always have large volume expansion during lithiation when they are used in lithium-ion batteries. Designing hollow structures is a well-established strategy to accommodate the volume change because of sufficient internal void space. Here we report a facile template-free route to prepare hollow Ge nanospheres without using any templates through a quasi-microemulsion method. Ge nanocrystals are preferably self-assembled along the interface of liquid vesicles between water and tetrahydrofuran, and well-defined hollow architectures of ∼50 nm in diameter are formed. Both the wall thickness and hollow interiors can be easily tuned. After subsequent carbon coating via pyrolysis of acetylene, the as-formed Ge@C nanocomposite with hollow interiors exhibits a highly reversible capacity of about 920 mA h g−1 at 200 mA g−1 over 50 cycles, and excellent rate capability. The small size and the high structural integrity of hollow Ge@C structures contribute to the superior lithium-storage performances.

Graphical abstract: Rational synthesis of carbon-coated hollow Ge nanocrystals with enhanced lithium-storage properties

Back to tab navigation

Supplementary files

Publication details

The article was received on 01 Feb 2016, accepted on 12 May 2016 and first published on 13 May 2016


Article type: Paper
DOI: 10.1039/C6NR00937A
Citation: Nanoscale, 2016,8, 12215-12220
  •   Request permissions

    Rational synthesis of carbon-coated hollow Ge nanocrystals with enhanced lithium-storage properties

    W. Zhang, X. Chu, C. Chen, J. Xiang, X. Liu, Y. Huang and X. Hu, Nanoscale, 2016, 8, 12215
    DOI: 10.1039/C6NR00937A

Search articles by author

Spotlight

Advertisements