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Jung, Yoon Seok
Electrochemical Solid-State Energy Storage Lab
Research Interests
  • Batteries, All-solid-state batteries, solid electrolytes, electrodes, atomic layer deposition,energy storage devices

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HWCVD MoO3 nanoparticles and a-Si for next generation Li-ion anodes

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Title
HWCVD MoO3 nanoparticles and a-Si for next generation Li-ion anodes
Author
Dillon, A. C.Riley, L. A.Jung, Y. S.Ban, C.Molina, D.Mahan, A. H.Cavanagh, A. S.George, S. M.Lee, S-H
Keywords
Li-ion batteries; MoO3 nanoparticles; Amorphous silicon; Atomic layer deposition
Issue Date
2011-05
Publisher
ELSEVIER SCIENCE SA
Citation
THIN SOLID FILMS, v.519, no.14, pp.4495 - 4497
Abstract
We have employed hot wire chemical vapor deposition (HWCVD) for the generation of MoO3 nanostructures at high density. Furthermore, the morphology of the nanoparticles is easily tailored by altering the HWCVD synthesis conditions. The MoO3 nanoparticles have been demonstrated as high-capacity Li-ion battery anodes for next-generation electric vehicles. Specifically, the MoO3 anodes have been shown to have approximately three times the Li-ion capacity of commercially employed graphite anodes in thick electrodes suitable for vehicular applications. However because the materials are high volume expansion materials (>= 100%), conformal Al2O3 coatings deposited with atomic layer deposition (ALD) were required before high rate capability was demonstrated. Recently, NREL is exploring high capacity Si anode materials that have a volume expansion of similar to 400%. It is assumed that new ALD coatings will need to be developed in order to stabilize Si as an anode material. Silicon is a superior choice for an anode material to the metal oxide structures due to both a higher capacity and a significantly lower hysteresis in the voltage vs. Li/Li+ for the charge/discharge profiles. (C) 2011 Published by Elsevier B.V.
URI
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DOI
10.1016/j.tsf.2011.01.337
ISSN
0040-6090
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ECHE_Journal Papers
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