Flexible Dimensional Control of High-Capacity Li-Ion-Battery Anodes: From 0D Hollow to 3D Porous Germanium Nanoparticle Assemblies

Simple physical blending of SiO2 and ethyl‐capped Ge gels leads to flexible dimensional control of Ge nanoparticles, and an increasing weight fraction of the latter leads to ordered 3D porous nanoparticle assemblies (see figure). The long‐range ordering of the 3D porous Ge nanoparticles and their ve...

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Bibliographic Details
Published inAdvanced materials (Weinheim) Vol. 22; no. 3; pp. 415 - 418
Main Authors Park, Mi-Hee, Kim, Kitae, Kim, Jeyoung, Cho, Jaephil
Format Journal Article
LanguageEnglish
Published Weinheim WILEY-VCH Verlag 19.01.2010
WILEY‐VCH Verlag
Subjects
batteries
Electric Power Supplies
Electrodes
Germanium - chemistry
Lithium - chemistry
nanoparticles
Nanoparticles - chemistry
Nanoparticles - ultrastructure
Porosity
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Summary:Simple physical blending of SiO2 and ethyl‐capped Ge gels leads to flexible dimensional control of Ge nanoparticles, and an increasing weight fraction of the latter leads to ordered 3D porous nanoparticle assemblies (see figure). The long‐range ordering of the 3D porous Ge nanoparticles and their very thin pore wall thicknesses (<20 nm) induce excellent cycling performance, showing only a 2% capacity decrease after 100 cycles.
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ISSN:0935-9648
1521-4095
DOI:10.1002/adma.200901846