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dc.contributor.author
Dubey, Romain J.-C.
dc.contributor.author
Sasikumar, Pradeep V.M.
dc.contributor.author
Krumeich, Frank
dc.contributor.author
Blugan, Gurdial
dc.contributor.author
Kuebler, Jakob
dc.contributor.author
Kravchyk, Kostiantyn V.
dc.contributor.author
Graule, Thomas
dc.contributor.author
Kovalenko, Maksym V.
dc.date.accessioned
2019-10-07T13:06:12Z
dc.date.available
2019-08-08T02:03:14Z
dc.date.available
2019-08-09T11:41:08Z
dc.date.available
2019-10-07T13:06:12Z
dc.date.issued
2019-10-02
dc.identifier.other
10.1002/advs.201901220
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/357224
dc.identifier.doi
10.3929/ethz-b-000357224
dc.description.abstract
Tin‐based materials are an emerging class of Li‐ion anodes with considerable potential for use in high‐energy‐density Li‐ion batteries. However, the long‐lasting electrochemical performance of Sn remains a formidable challenge due to the large volume changes occurring upon its lithiation. The prevailing approaches toward stabilization of such electrodes involve embedding Sn in the form of nanoparticles (NPs) in an active/inactive matrix. The matrix helps to buffer the volume changes of Sn, impart better electronic connectivity and prevent particle aggregation upon lithiation/delithiation. Herein, facile synthesis of Sn NPs embedded in a SiOC matrix via the pyrolysis of a preceramic polymer as a single‐source precursor is reported. This polymer contains Sn 2‐ethyl‐hexanoate (Sn(Oct)2) and poly(methylhydrosiloxane) as sources of Sn and Si, respectively. Upon functionalization with apolar divinyl benzene sidechains, the polymer is rendered compatible with Sn(Oct)2. This approach yields a homogeneous dispersion of Sn NPs in a SiOC matrix with sizes on the order of 5–30 nm. Anodes of the SiOC/Sn nanocomposite demonstrate high capacities of 644 and 553 mAh g−1 at current densities of 74.4 and 2232 mA g−1 (C/5 and 6C rates for graphite), respectively, and show superior rate capability with only 14% capacity decay at high currents.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Wiley
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
electrochemical energy storage
en_US
dc.subject
lithium
en_US
dc.subject
nanocomposites
en_US
dc.subject
silicon oxycarbide
en_US
dc.subject
tin metal
en_US
dc.title
Silicon Oxycarbide-Tin Nanocomposite as a High-Power-Density Anode for Li-Ion Batteries
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2019-07-28
ethz.journal.title
Advanced Science
ethz.journal.volume
6
en_US
ethz.journal.issue
19
en_US
ethz.pages.start
1901220
en_US
ethz.size
9 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Weinheim
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2019-08-08T02:03:18Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2019-10-07T13:06:25Z
ethz.rosetta.lastUpdated
2019-10-07T13:06:25Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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