Highly Conductive, Mechanically Robust, and Electrochemically Inactive TiC/C Nanofiber Scaffold for High-Performance Silicon Anode Batteries

Handle URI:
http://hdl.handle.net/10754/598501
Title:
Highly Conductive, Mechanically Robust, and Electrochemically Inactive TiC/C Nanofiber Scaffold for High-Performance Silicon Anode Batteries
Authors:
Yao, Yan; Huo, Kaifu; Hu, Liangbing; Liu, Nian; Cha, Judy J.; McDowell, Matthew T.; Chu, Paul K.; Cui, Yi
Abstract:
Silicon has a high specific capacity of 4200 mAh/g as lithium-ion battery anodes, but its rapid capacity fading due to >300% volume expansion and pulverization presents a significant challenge for practical applications. Here we report a core-shell TiC/C/Si inactive/active nanocomposite for Si anodes demonstrating high specific capacity and excellent electrochemical cycling. The amorphous silicon layer serves as the active material to store Li+, while the inactive TiC/C nanofibers act as a conductive and mechanically robust scaffold for electron transport during the Li-Si alloying process. The core-shell TiC/C/Si nanocomposite anode shows ∼3000 mAh g-1 discharge capacity and 92% capacity retention after 100 charge/discharge cycles. The excellent cycling stability and high rate performance could be attributed to the tapering of the nanofibers and the open structure that allows facile Li ion transport and the high conductivity and mechanical stability of the TiC/C scaffold. © 2011 American Chemical Society.
Citation:
Yao Y, Huo K, Hu L, Liu N, Cha JJ, et al. (2011) Highly Conductive, Mechanically Robust, and Electrochemically Inactive TiC/C Nanofiber Scaffold for High-Performance Silicon Anode Batteries. ACS Nano 5: 8346–8351. Available: http://dx.doi.org/10.1021/nn2033693.
Publisher:
American Chemical Society (ACS)
Journal:
ACS Nano
KAUST Grant Number:
KUS-l1-001-12
Issue Date:
25-Oct-2011
DOI:
10.1021/nn2033693
PubMed ID:
21974912
Type:
Article
ISSN:
1936-0851; 1936-086X
Sponsors:
This work was partially supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy, under Contract No. DE-AC02-05CH11231, Subcontract No. 6951379 under the Batteries for Advanced Transportation Technologies (BATT) Program. A portion of this work is also supported by the Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, under Contract DE-AC02-76SF0051, through the SLAC National Accelerator Laboratory LDRD project. Y.C. acknowledges support from the King Abdullah University of Science and Technology Investigator Award (No. KUS-l1-001-12). K.H. acknowledges support from National Natural Science Foundation of China (No. 50902104), City University of Hong Kong Strategic Research Grant No. 7008009, and China Scholarship Council (No. 2010842443).
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Full metadata record

DC FieldValue Language
dc.contributor.authorYao, Yanen
dc.contributor.authorHuo, Kaifuen
dc.contributor.authorHu, Liangbingen
dc.contributor.authorLiu, Nianen
dc.contributor.authorCha, Judy J.en
dc.contributor.authorMcDowell, Matthew T.en
dc.contributor.authorChu, Paul K.en
dc.contributor.authorCui, Yien
dc.date.accessioned2016-02-25T13:31:07Zen
dc.date.available2016-02-25T13:31:07Zen
dc.date.issued2011-10-25en
dc.identifier.citationYao Y, Huo K, Hu L, Liu N, Cha JJ, et al. (2011) Highly Conductive, Mechanically Robust, and Electrochemically Inactive TiC/C Nanofiber Scaffold for High-Performance Silicon Anode Batteries. ACS Nano 5: 8346–8351. Available: http://dx.doi.org/10.1021/nn2033693.en
dc.identifier.issn1936-0851en
dc.identifier.issn1936-086Xen
dc.identifier.pmid21974912en
dc.identifier.doi10.1021/nn2033693en
dc.identifier.urihttp://hdl.handle.net/10754/598501en
dc.description.abstractSilicon has a high specific capacity of 4200 mAh/g as lithium-ion battery anodes, but its rapid capacity fading due to >300% volume expansion and pulverization presents a significant challenge for practical applications. Here we report a core-shell TiC/C/Si inactive/active nanocomposite for Si anodes demonstrating high specific capacity and excellent electrochemical cycling. The amorphous silicon layer serves as the active material to store Li+, while the inactive TiC/C nanofibers act as a conductive and mechanically robust scaffold for electron transport during the Li-Si alloying process. The core-shell TiC/C/Si nanocomposite anode shows ∼3000 mAh g-1 discharge capacity and 92% capacity retention after 100 charge/discharge cycles. The excellent cycling stability and high rate performance could be attributed to the tapering of the nanofibers and the open structure that allows facile Li ion transport and the high conductivity and mechanical stability of the TiC/C scaffold. © 2011 American Chemical Society.en
dc.description.sponsorshipThis work was partially supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy, under Contract No. DE-AC02-05CH11231, Subcontract No. 6951379 under the Batteries for Advanced Transportation Technologies (BATT) Program. A portion of this work is also supported by the Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, under Contract DE-AC02-76SF0051, through the SLAC National Accelerator Laboratory LDRD project. Y.C. acknowledges support from the King Abdullah University of Science and Technology Investigator Award (No. KUS-l1-001-12). K.H. acknowledges support from National Natural Science Foundation of China (No. 50902104), City University of Hong Kong Strategic Research Grant No. 7008009, and China Scholarship Council (No. 2010842443).en
dc.publisherAmerican Chemical Society (ACS)en
dc.subjectconductive scaffolden
dc.subjectcycling stabilityen
dc.subjectlithium-ion batteriesen
dc.subjectsilicon anodeen
dc.subjecttitanium carbideen
dc.titleHighly Conductive, Mechanically Robust, and Electrochemically Inactive TiC/C Nanofiber Scaffold for High-Performance Silicon Anode Batteriesen
dc.typeArticleen
dc.identifier.journalACS Nanoen
dc.contributor.institutionStanford University, Palo Alto, United Statesen
dc.contributor.institutionCity University of Hong Kong, Hong Kong, Chinaen
dc.contributor.institutionStanford Linear Accelerator Center, Menlo Park, United Statesen
kaust.grant.numberKUS-l1-001-12en

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