Superior flexibility of a wrinkled carbon shell under electrochemical cycling

Handle URI:
http://hdl.handle.net/10754/563185
Title:
Superior flexibility of a wrinkled carbon shell under electrochemical cycling
Authors:
Li, Qianqian; Wang, Peng; Feng, Qiong; Mao, Minmin; Liu, Jiabin; Wang, Hongtao; Mao, Scott; Zhang, Xixiang ( 0000-0002-3478-6414 )
Abstract:
Nanocarbon composites have been extensively employed in engineering alloy-type anodes in order to improve the poor cyclability caused by the enormous volume changes during lithium (Li+) insertion/extraction. The chemical vapor deposited wrinkled carbon shell (WCS) shows high electrical conductivity, excellent thermal stability and remarkable mechanical robustness, which help in retaining the structural integrity around the tin (Sn) anode core despite ∼250% variation in volume during repetitive lithiation and delithiation. In situ transmission electron microscopy reveals no embrittlement in the lithiated WCS, which fully recovers its original shape after severe mechanical deformation with no obvious structural change. Further analysis indicates that the capacity to accommodate large strains is closely related to the construction of the carbon shell, that is, the stacking of wrinkled few-layer graphenes. Both the pre-existing wrinkles and the few-layer thickness render the carbon shell superior flexibility and good elasticity under bending or expansion of the interior volume. Moreover, the WCS possesses fast lithium ion diffusion channels, which have lower activation barriers (∼0.1 eV) than that on a smooth graphene (∼0.3 eV). The results provide an insight into the improvement in cycle performance that can be achieved through carbon coating of anodes of lithium ion batteries. © 2014 The Royal Society of Chemistry.
KAUST Department:
Advanced Nanofabrication, Imaging and Characterization Core Lab; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program
Publisher:
Royal Society of Chemistry (RSC)
Journal:
Journal of Materials Chemistry A
Issue Date:
2014
DOI:
10.1039/c3ta15142e
Type:
Article
ISSN:
20507488
Sponsors:
H. Wang acknowledges the financial support from the National Science Foundation of China (Grant no. 11322219), National Program for Special Support of Top-Notch Young Professionals and Fundamental Research Funds for the Central Universities. Q. Li acknowledges the award for excellent doctoral student from the Ministry of Education (Grant no. 188310-720907/014).
Appears in Collections:
Articles; Advanced Nanofabrication, Imaging and Characterization Core Lab; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorLi, Qianqianen
dc.contributor.authorWang, Pengen
dc.contributor.authorFeng, Qiongen
dc.contributor.authorMao, Minminen
dc.contributor.authorLiu, Jiabinen
dc.contributor.authorWang, Hongtaoen
dc.contributor.authorMao, Scotten
dc.contributor.authorZhang, Xixiangen
dc.date.accessioned2015-08-03T11:37:43Zen
dc.date.available2015-08-03T11:37:43Zen
dc.date.issued2014en
dc.identifier.issn20507488en
dc.identifier.doi10.1039/c3ta15142een
dc.identifier.urihttp://hdl.handle.net/10754/563185en
dc.description.abstractNanocarbon composites have been extensively employed in engineering alloy-type anodes in order to improve the poor cyclability caused by the enormous volume changes during lithium (Li+) insertion/extraction. The chemical vapor deposited wrinkled carbon shell (WCS) shows high electrical conductivity, excellent thermal stability and remarkable mechanical robustness, which help in retaining the structural integrity around the tin (Sn) anode core despite ∼250% variation in volume during repetitive lithiation and delithiation. In situ transmission electron microscopy reveals no embrittlement in the lithiated WCS, which fully recovers its original shape after severe mechanical deformation with no obvious structural change. Further analysis indicates that the capacity to accommodate large strains is closely related to the construction of the carbon shell, that is, the stacking of wrinkled few-layer graphenes. Both the pre-existing wrinkles and the few-layer thickness render the carbon shell superior flexibility and good elasticity under bending or expansion of the interior volume. Moreover, the WCS possesses fast lithium ion diffusion channels, which have lower activation barriers (∼0.1 eV) than that on a smooth graphene (∼0.3 eV). The results provide an insight into the improvement in cycle performance that can be achieved through carbon coating of anodes of lithium ion batteries. © 2014 The Royal Society of Chemistry.en
dc.description.sponsorshipH. Wang acknowledges the financial support from the National Science Foundation of China (Grant no. 11322219), National Program for Special Support of Top-Notch Young Professionals and Fundamental Research Funds for the Central Universities. Q. Li acknowledges the award for excellent doctoral student from the Ministry of Education (Grant no. 188310-720907/014).en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.titleSuperior flexibility of a wrinkled carbon shell under electrochemical cyclingen
dc.typeArticleen
dc.contributor.departmentAdvanced Nanofabrication, Imaging and Characterization Core Laben
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.identifier.journalJournal of Materials Chemistry Aen
dc.contributor.institutionInstitute of Applied Mechanics, Zhejiang University, Hangzhou 310027, Chinaen
dc.contributor.institutionDepartment of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, Chinaen
dc.contributor.institutionCollege of Electrical Engineering, Zhejiang University, Hangzhou 310027, Chinaen
dc.contributor.institutionDepartment of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261, United Statesen
kaust.authorZhang, Xixiangen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.