DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kang, E | - |
dc.contributor.author | Jung, YS | - |
dc.contributor.author | Kim, GH | - |
dc.contributor.author | Chun, J | - |
dc.contributor.author | Wiesner, U | - |
dc.contributor.author | Dillon, AC | - |
dc.contributor.author | Kim, JK | - |
dc.contributor.author | Lee, J | - |
dc.date.accessioned | 2016-03-31T09:15:54Z | - |
dc.date.available | 2016-03-31T09:15:54Z | - |
dc.date.created | 2011-12-01 | - |
dc.date.issued | 2011-11-22 | - |
dc.identifier.issn | 1616-301X | - |
dc.identifier.other | 2012-OAK-0000024631 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/16914 | - |
dc.description.abstract | A mesostructured spinel Li4Ti5O12 (LTO)-carbon nanocomposite (denoted as Meso-LTO-C) with large (>15 nm) and uniform pores is simply synthesized via block copolymer self-assembly. Exceptionally high rate capability is then demonstrated for Li-ion battery (LIB) negative electrodes. Polyisoprene-block-poly(ethylene oxide) (PI-b-PEO) with a sp2-hybridized carbon-containing hydrophobic block is employed as a structure-directing agent. Then the assembled composite material is crystallized at 700 degrees C enabling conversion to the spinel LTO structure without loss of structural integrity. Part of the PI is converted to a conductive carbon that coats the pores of the Meso-LTO-C. The in situ pyrolyzed carbon not only maintains the porous mesostructure as the LTO is crystallized, but also improves the electronic conductivity. A Meso-LTO-C/Li cell then cycles stably at 10 C-rate, corresponding to only 6 min for complete charge and discharge, with a reversible capacity of 115 mA h g-1 with 90% capacity retention after 500 cycles. In sharp contrast, a Bulk-LTO/Li cell exhibits only 69 mA h g-1 at 10 C-rate. Electrochemical impedance spectroscopy (EIS) with symmetric LTO/LTO cells prepared from Bulk-LTO and Meso-LTO-C cycled in different potential ranges reveals the factors contributing to the vast difference between the rate-capabilities. The carbon-coated mesoporous structure enables highly improved electronic conductivity and significantly reduced charge transfer resistance, and a much smaller overall resistance is observed compared to Bulk-LTO. Also, the solid electrolyte interphase (SEI)-free surface due to the limited voltage window (>1 V versus Li/Li+) contributes to dramatically reduced resistance. | - |
dc.description.statementofresponsibility | X | - |
dc.language | English | - |
dc.publisher | Wiley-VCH Verlag | - |
dc.relation.isPartOf | ADVANCED FUNCTIONAL MATERIALS | - |
dc.subject | TRANSITION-METAL OXIDES | - |
dc.subject | MOLECULAR-SIEVES | - |
dc.subject | ANODE MATERIAL | - |
dc.subject | ELECTROCHEMICAL-BEHAVIOR | - |
dc.subject | HIGH-POWER | - |
dc.subject | LI4TI5O12 | - |
dc.subject | SPINEL | - |
dc.subject | INSERTION | - |
dc.subject | INTERCALATION | - |
dc.subject | INTERPHASE | - |
dc.title | Highly Improved Rate Capability for a Lithium-Ion Battery Nano-Li4Ti5O12 Negative Electrode via Carbon-Coated Mesoporous Uniform Pores with a Simple Self-Assembly Method | - |
dc.type | Article | - |
dc.contributor.college | 화학공학과 | - |
dc.identifier.doi | 10.1002/ADFM.201101123 | - |
dc.author.google | Kang, E | - |
dc.author.google | Jung, YS | - |
dc.author.google | Kim, GH | - |
dc.author.google | Chun, J | - |
dc.author.google | Wiesner, U | - |
dc.author.google | Dillon, AC | - |
dc.author.google | Kim, JK | - |
dc.author.google | Lee, J | - |
dc.relation.volume | 21 | - |
dc.relation.issue | 22 | - |
dc.relation.startpage | 4349 | - |
dc.relation.lastpage | 4357 | - |
dc.contributor.id | 10138815 | - |
dc.relation.journal | ADVANCED FUNCTIONAL MATERIALS | - |
dc.relation.index | SCI급, SCOPUS 등재논문 | - |
dc.relation.sci | SCI | - |
dc.collections.name | Journal Papers | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | ADVANCED FUNCTIONAL MATERIALS, v.21, no.22, pp.4349 - 4357 | - |
dc.identifier.wosid | 000297097900019 | - |
dc.date.tcdate | 2019-01-01 | - |
dc.citation.endPage | 4357 | - |
dc.citation.number | 22 | - |
dc.citation.startPage | 4349 | - |
dc.citation.title | ADVANCED FUNCTIONAL MATERIALS | - |
dc.citation.volume | 21 | - |
dc.contributor.affiliatedAuthor | Kim, JK | - |
dc.contributor.affiliatedAuthor | Lee, J | - |
dc.identifier.scopusid | 2-s2.0-81555229442 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.wostc | 194 | - |
dc.description.scptc | 187 | * |
dc.date.scptcdate | 2018-05-121 | * |
dc.type.docType | Article | - |
dc.subject.keywordPlus | TRANSITION-METAL OXIDES | - |
dc.subject.keywordPlus | MOLECULAR-SIEVES | - |
dc.subject.keywordPlus | ANODE MATERIAL | - |
dc.subject.keywordPlus | ELECTROCHEMICAL-BEHAVIOR | - |
dc.subject.keywordPlus | HIGH-POWER | - |
dc.subject.keywordPlus | LI4TI5O12 | - |
dc.subject.keywordPlus | SPINEL | - |
dc.subject.keywordPlus | INSERTION | - |
dc.subject.keywordPlus | INTERCALATION | - |
dc.subject.keywordPlus | INTERPHASE | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.relation.journalWebOfScienceCategory | Physics, Condensed Matter | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Physics | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
library@postech.ac.kr Tel: 054-279-2548
Copyrights © by 2017 Pohang University of Science ad Technology All right reserved.