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Issue 77, 2015
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Ge@C three-dimensional porous particles as high-performance anode materials of lithium-ion batteries

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Abstract

We demonstrate the synthesis of Ge@C three-dimensional porous particles (Ge@C TPP) via the decomposition of magnesium germanide (Mg2Ge) and subsequent deposition of a carbon layer. Briefly, Ge TPP is first synthesized by the annealing of a Mg2Ge precursor in air and a subsequent acid pickling process. Then, the carbon layer is deposited onto the Ge TPP by the pyrolysis of acetylene to form Ge@C TPP. When used as anode materials in lithium-ion batteries, the Ge@C TPP shows higher reversible capacity and better cycling performance than bulk Ge and bare Ge TPP. It is believed that the porous and core–shell structures can accommodate the volume change, give more lithiation sites, and stabilize the structure during the charge/discharge process, which may be responsible for the enhanced performance.

Graphical abstract: Ge@C three-dimensional porous particles as high-performance anode materials of lithium-ion batteries

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Article information


Submitted
14 May 2015
Accepted
10 Jul 2015
First published
10 Jul 2015

RSC Adv., 2015,5, 63056-63062
Article type
Paper

Ge@C three-dimensional porous particles as high-performance anode materials of lithium-ion batteries

C. Xiao, N. Du, Y. Chen, J. Yu, W. Zhao and D. Yang, RSC Adv., 2015, 5, 63056
DOI: 10.1039/C5RA08656F

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