Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 1, Issue 26, Pages 7666-7672Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta11381g
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Funding
- Australian Research Council (ARC) [DP1094261]
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In this work, we synthesize mesoporous and hollow germanium@carbon nanostructures through simultaneous carbon coating and reduction of a hollow ellipsoidal GeO2 precursor. The formation mechanism of GeO2 ellipsoids and the ratio of Ge4+ to Sn4+ as the starting materials are also investigated. Compared to the solid ellipsoidal Ge@carbon (Ge@C-3), the hollow ellipsoidal Ge@C-1 sample exhibits better cycling stability (100% capacity retention after 200 cycles at the 0.2 C rate) and higher rate capability (805 mA h g(-1) at 20 C) compared to Ge@C-3 due to its unique hollow structure; therefore, this hollow ellipsoidal Ge@carbon can be considered as a potential anode material for lithium ion batteries.
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