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In Situ Lithiation–Delithiation of Mechanically Robust Cu–Si Core–Shell Nanolattices in a Scanning Electron Microscope

Xia, Xiaoxing and Di Leo, Claudio V. and Gu, X. Wendy and Greer, Julia R. (2016) In Situ Lithiation–Delithiation of Mechanically Robust Cu–Si Core–Shell Nanolattices in a Scanning Electron Microscope. ACS Energy Letters, 1 (3). pp. 492-499. ISSN 2380-8195. http://resolver.caltech.edu/CaltechAUTHORS:20160815-085245379

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Abstract

Nanoarchitected Cu–Si core–shell lattices were fabricated via two-photon lithography and tested as mechanically robust Li-ion battery electrodes which accommodate ∼250% Si volume expansion during lithiation. The superior mechanical performance of the nanolattice electrodes is directly observed using an in situ scanning electron microscope, which allows volume expansion and morphological changes to be imaged at multiple length scales, from single lattice beam to the architecture level, during electrochemical testing. Finite element modeling of lithiation-induced volume expansion in a core–shell structure reveals that geometry and plasticity mechanisms play a critical role in preventing damage in the nanolattice electrodes. The two-photon lithography-based fabrication method combined with computational modeling and in situ characterization capabilities would potentially enable the rational design and fast discovery of mechanically robust and kinetically agile electrode materials that independently optimize geometry, feature size, porosity, surface area, and chemical composition, as well as other functional devices in which mechanical and transport phenomena are important.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/acsenergylett.6b00256DOIArticle
http://pubs.acs.org/doi/abs/10.1021/acsenergylett.6b00256PublisherArticle
http://pubs.acs.org/doi/suppl/10.1021/acsenergylett.6b00256PublisherSupporting Information
ORCID:
AuthorORCID
Greer, Julia R.0000-0002-9675-1508
Additional Information:© 2016 American Chemical Society. Received: July 8, 2016; Accepted: August 5, 2016; Publication Date (Web): August 9, 2016. X.X. thanks the CI2 Grant and the EAS Discovery Grant at Caltech. X.W.G. thanks the National Defense Science and Engineering Graduate Fellowship for financial support during her Ph.D. studies at Caltech. Thanks to Dr. Betar Gallant, Dylan Tozier, and Dr. Heng Yang for helpful discussion; to Alex Lozano for help with testing the initial experimental setup; and to Dr. Lucas Meza for computer design of octet lattice structures. We are grateful to the Kavli Nanoscience Institute staff, especially Melissa Melendes and Dr. Matthew Hunt for cleanroom equipment help and Carol Garland for TEM assistance. The authors declare no competing financial interest.
Group:Kavli Nanoscience Institute
Funders:
Funding AgencyGrant Number
Caltech Innovation Initiative (CI2)UNSPECIFIED
Caltech Division of Engineering and Applied ScienceUNSPECIFIED
National Defense Science and Engineering Graduate (NDSEG) FellowshipUNSPECIFIED
Record Number:CaltechAUTHORS:20160815-085245379
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160815-085245379
Official Citation:In Situ Lithiation–Delithiation of Mechanically Robust Cu–Si Core–Shell Nanolattices in a Scanning Electron Microscope Xiaoxing Xia, Claudio V. Di Leo, X. Wendy Gu, and Julia R. Greer ACS Energy Letters 2016 1 (3), 492-499 DOI: 10.1021/acsenergylett.6b00256
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:69618
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:15 Aug 2016 17:25
Last Modified:05 Jan 2017 21:26

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