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Cho, Jaephil
Nano Energy Storage Materials Lab (NESM)
Research Interests
  • Li-ion battery, metal-air battery, redox-flow battery, flexible battery .

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

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Title
Flexible Dimensional Control of High-Capacity Li-Ion-Battery Anodes: From 0D Hollow to 3D Porous Germanium Nanoparticle Assemblies
Author
Park, Mi-HeeKim, KitaeKim, JeyoungCho, Jaephil
Keywords
Battery anodes; Cycling performance; Dimensional control; Ge Nanoparticles; High-capacity; Long-range ordering; Nanoparticle assemblies; Physical blending; Pore wall; Porous nanoparticles; Weight fractions
Issue Date
201001
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED MATERIALS, v.22, no.3, pp.415 - 418
Abstract
Simple physical blending of SiO(2) and ethylcapped 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.
URI
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DOI
http://dx.doi.org/10.1002/adma.200901846
ISSN
0935-9648
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