Jump to main content
Jump to site search

Issue 9, 2019
Previous Article Next Article

Reversible conversion reaction of GeO2 boosts lithium-ion storage via Fe doping

Author affiliations

Abstract

In the present study, for the first time, hierarchically structural microflowers composed of Fe-doped GeO2 nanosheets have been synthesized via a facile solvothermal route. It has been found that Fe3+ was not only a structure-directing agent, facilitating the formation of hierarchical structure by a self-assembly process, but also used for in situ doping of GeO2. As a result, an anode with a hierarchical structure shortened the diffusion distance of Li+ and hierarchically buffer volume expansion. Simultaneously, Fe-GeO2 with oxygen vacancies and narrower bandgaps could provide more active sites for Li insertion and improve the electrical conductivity, respectively. Consequently, Fe-doped GeO2 delivered an ultra-long cycling stability of 866 mA h gāˆ’1 even after 1000 cycles at a current density as high as 1 A gāˆ’1. It is unexpectedly found that Fe also played a role of catalyst for reversible utilization of partial Li2O.

Graphical abstract: Reversible conversion reaction of GeO2 boosts lithium-ion storage via Fe doping

Back to tab navigation

Supplementary files

Publication details

The article was received on 26 Dec 2018, accepted on 24 Jan 2019 and first published on 25 Jan 2019


Article type: Paper
DOI: 10.1039/C8TA12434E
Citation: J. Mater. Chem. A, 2019,7, 4574-4580

  •   Request permissions

    Reversible conversion reaction of GeO2 boosts lithium-ion storage via Fe doping

    J. Wu, N. Luo, S. Huang, W. Yang and M. Wei, J. Mater. Chem. A, 2019, 7, 4574
    DOI: 10.1039/C8TA12434E

Search articles by author

Spotlight

Advertisements