Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 5, 2013
Previous Article Next Article

Germanium–graphene composite anode for high-energy lithium batteries with long cycle life

Author affiliations

Abstract

The high-energy lithium ion battery is an ideal power source for electric vehicles and grid-scale energy storage applications. Germanium is a promising anode material for lithium ion batteries due to its high specific capacity, but still suffers from poor cyclability. Here, we report a facile preparation of a germanium–graphene nanocomposite using a low-pressure thermal evaporation approach, by which crystalline germanium particles are uniformly deposited on graphene surfaces or embedded into graphene sheets. The nanocomposite exhibits a high Coulombic efficiency of 80.4% in the first cycle and a capacity retention of 84.9% after 400 full cycles in a half cell, along with high utilization of germanium in the composite and high rate capability. These outstanding properties are attributed to the monodisperse distribution of high-quality germanium particles in a flexible graphene framework. This preparation approach can be extended to other active elements that can be easily evaporated (e.g., sulfur, phosphorus) for the preparation of graphene-based composites for lithium ion battery applications.

Graphical abstract: Germanium–graphene composite anode for high-energy lithium batteries with long cycle life

Back to tab navigation

Publication details

The article was received on 28 Nov 2012, accepted on 30 Nov 2012 and first published on 10 Dec 2012


Article type: Paper
DOI: 10.1039/C2TA01286C
Citation: J. Mater. Chem. A, 2013,1, 1821-1826

  •   Request permissions

    Germanium–graphene composite anode for high-energy lithium batteries with long cycle life

    J. Ren, Q. Wu, H. Tang, G. Hong, W. Zhang and S. Lee, J. Mater. Chem. A, 2013, 1, 1821
    DOI: 10.1039/C2TA01286C

Search articles by author

Spotlight

Advertisements