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DC Field | Value | Language |
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dc.citation.endPage | 3514 | - |
dc.citation.number | 11 | - |
dc.citation.startPage | 3508 | - |
dc.citation.title | CHEMISTRY OF MATERIALS | - |
dc.citation.volume | 26 | - |
dc.contributor.author | Jo, Changshin | - |
dc.contributor.author | Kim, Youngsik | - |
dc.contributor.author | Hwang, Jongkook | - |
dc.contributor.author | Shim, Jongmin | - |
dc.contributor.author | Chun, Jinyoung | - |
dc.contributor.author | Lee, Jinwoo | - |
dc.date.accessioned | 2023-12-22T02:38:51Z | - |
dc.date.available | 2023-12-22T02:38:51Z | - |
dc.date.created | 2014-06-26 | - |
dc.date.issued | 2014-06 | - |
dc.description.abstract | In order to achieve high-power and -energy anodes operating above 1.0 V (vs Li/Li+), titanium-based materials have been investigated for a long time. However, theoretically low lithium charge capacities of titanium-anodes have required new types of high-capacity anode materials. As a candidate, TiNb2O7 has attracted much attention due to the high theoretical capacity of 387.6 mA h g-1. However, the high formation temperature of the TiNb2O7 phase resulted in large-sized TiNb2O7 crystals, thus resulting in poor rate capability. Herein, ordered mesoporous TiNb2O7 (denoted as m-TNO) was synthesized by block copolymer assisted self-assembly, and the resulting binary metal oxide was applied as an anode in a lithium ion battery. The nanocrystals (∼15 nm) developed inside the confined pore walls and large pores (∼40 nm) of m-TNO resulted in a short diffusion length for lithium ions/electrons and fast penetration of electrolyte. As a stable anode, the m-TNO electrode exhibited a high capacity of 289 mA h g-1 (at 0.1 C) and an excellent rate performance of 162 mA h g-1 at 20 C and 116 mA h g-1 at 50 C (= 19.35 A g-1) within a potential range of 1.0-3.0 V (vs Li/Li+), which clearly surpasses other Ti-and Nb-based anode materials (TiO2, Li4Ti5O12, Nb 2O5, etc.) and previously reported TiNb2O 7 materials. The m-TNO and carbon coated m-TNO electrodes also demonstrated stable cycle performances of 48 and 81% retention during 2,000 cycles at 10 C rate, respectively. | - |
dc.identifier.bibliographicCitation | CHEMISTRY OF MATERIALS, v.26, no.11, pp.3508 - 3514 | - |
dc.identifier.doi | 10.1021/cm501011d | - |
dc.identifier.issn | 0897-4756 | - |
dc.identifier.scopusid | 2-s2.0-84902129810 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/5081 | - |
dc.identifier.url | http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84902129810 | - |
dc.identifier.wosid | 000337199400024 | - |
dc.language | 영어 | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Block Copolymer Directed Ordered Mesostructured TiNb2O7 Multimetallic Oxide Constructed of Nanocrystals as High Power Li-Ion Battery Anodes | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical; Materials Science, Multidisciplinary | - |
dc.relation.journalResearchArea | Chemistry; Materials Science | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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