In Situ X-ray Diffraction Studies of (De)lithiation Mechanism in Silicon Nanowire Anodes

Handle URI:
http://hdl.handle.net/10754/598599
Title:
In Situ X-ray Diffraction Studies of (De)lithiation Mechanism in Silicon Nanowire Anodes
Authors:
Misra, Sumohan; Liu, Nian; Nelson, Johanna; Hong, Seung Sae; Cui, Yi; Toney, Michael F.
Abstract:
Figure Persented: Silicon is a promising anode material for Li-ion batteries due to its high theoretical specific capacity. From previous work, silicon nanowires (SiNWs) are known to undergo amorphorization during lithiation, and no crystalline Li-Si product has been observed. In this work, we use an X-ray transparent battery cell to perform in situ synchrotron X-ray diffraction on SiNWs in real time during electrochemical cycling. At deep lithiation voltages the known metastable Li 15Si 4 phase forms, and we show that avoiding the formation of this phase, by modifying the SiNW growth temperature, improves the cycling performance of SiNW anodes. Our results provide insight on the (de)lithiation mechanism and a correlation between phase evolution and electrochemical performance for SiNW anodes. © 2012 American Chemical Society.
Citation:
Misra S, Liu N, Nelson J, Hong SS, Cui Y, et al. (2012) In Situ X-ray Diffraction Studies of (De)lithiation Mechanism in Silicon Nanowire Anodes . ACS Nano 6: 5465–5473. Available: http://dx.doi.org/10.1021/nn301339g.
Publisher:
American Chemical Society (ACS)
Journal:
ACS Nano
KAUST Grant Number:
KUS-I1-001-12
Issue Date:
26-Jun-2012
DOI:
10.1021/nn301339g
PubMed ID:
22558938
Type:
Article
ISSN:
1936-0851; 1936-086X
Sponsors:
We thank F. U. Renner for his valuable comments. Portions of this research were carried out at the Stanford Synchrotron Radiation Lightsource, a national user facility operated by Stanford University on behalf of the U.S. Department of Energy, Office of Basic Energy Sciences. This work is supported by the Department of Energy, Laboratory Directed Research and Development funding, under contract DE-AC02-76SF00515 (J.N., M.F.T., Y.C.). Y.C. acknowledges support from the King Abdullah University of Science and Technology (KAUST) Investigator Award (No. KUS-I1-001-12).
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Full metadata record

DC FieldValue Language
dc.contributor.authorMisra, Sumohanen
dc.contributor.authorLiu, Nianen
dc.contributor.authorNelson, Johannaen
dc.contributor.authorHong, Seung Saeen
dc.contributor.authorCui, Yien
dc.contributor.authorToney, Michael F.en
dc.date.accessioned2016-02-25T13:32:52Zen
dc.date.available2016-02-25T13:32:52Zen
dc.date.issued2012-06-26en
dc.identifier.citationMisra S, Liu N, Nelson J, Hong SS, Cui Y, et al. (2012) In Situ X-ray Diffraction Studies of (De)lithiation Mechanism in Silicon Nanowire Anodes . ACS Nano 6: 5465–5473. Available: http://dx.doi.org/10.1021/nn301339g.en
dc.identifier.issn1936-0851en
dc.identifier.issn1936-086Xen
dc.identifier.pmid22558938en
dc.identifier.doi10.1021/nn301339gen
dc.identifier.urihttp://hdl.handle.net/10754/598599en
dc.description.abstractFigure Persented: Silicon is a promising anode material for Li-ion batteries due to its high theoretical specific capacity. From previous work, silicon nanowires (SiNWs) are known to undergo amorphorization during lithiation, and no crystalline Li-Si product has been observed. In this work, we use an X-ray transparent battery cell to perform in situ synchrotron X-ray diffraction on SiNWs in real time during electrochemical cycling. At deep lithiation voltages the known metastable Li 15Si 4 phase forms, and we show that avoiding the formation of this phase, by modifying the SiNW growth temperature, improves the cycling performance of SiNW anodes. Our results provide insight on the (de)lithiation mechanism and a correlation between phase evolution and electrochemical performance for SiNW anodes. © 2012 American Chemical Society.en
dc.description.sponsorshipWe thank F. U. Renner for his valuable comments. Portions of this research were carried out at the Stanford Synchrotron Radiation Lightsource, a national user facility operated by Stanford University on behalf of the U.S. Department of Energy, Office of Basic Energy Sciences. This work is supported by the Department of Energy, Laboratory Directed Research and Development funding, under contract DE-AC02-76SF00515 (J.N., M.F.T., Y.C.). Y.C. acknowledges support from the King Abdullah University of Science and Technology (KAUST) Investigator Award (No. KUS-I1-001-12).en
dc.publisherAmerican Chemical Society (ACS)en
dc.subject(de)lithiation mechanismen
dc.subjectelectrochemical performanceen
dc.subjectin situ X-ray diffractionen
dc.subjectLi-ion batteriesen
dc.subjectphase evolutionen
dc.subjectsilicon nanowiresen
dc.titleIn Situ X-ray Diffraction Studies of (De)lithiation Mechanism in Silicon Nanowire Anodesen
dc.typeArticleen
dc.identifier.journalACS Nanoen
dc.contributor.institutionStanford Synchrotron Radiation Laboratory, Menlo Park, United Statesen
dc.contributor.institutionStanford University, Palo Alto, United Statesen
dc.contributor.institutionStanford Linear Accelerator Center, Menlo Park, United Statesen
kaust.grant.numberKUS-I1-001-12en

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