Full metadata record
DC Field | Value | Language |
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dc.contributor.author | 방진호 | - |
dc.date.accessioned | 2023-05-31T01:56:45Z | - |
dc.date.available | 2023-05-31T01:56:45Z | - |
dc.date.issued | 2022-02 | - |
dc.identifier.citation | ACS Applied Materials and Interfaces, v. 14, NO. 5, Page. 6560-6569 | - |
dc.identifier.issn | 1944-8244;1944-8252 | - |
dc.identifier.uri | https://pubs.acs.org/doi/10.1021/acsami.1c20265 | en_US |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/181713 | - |
dc.description.abstract | TiO2 offers several advantages over graphite as an anode material for Li-ion batteries (LIBs) but suffers from low electrical conductivity and Li-diffusion issues. Control over defect chemistry has proven to be an effective strategy to overcome these issues. However, defect engineering has primarily been focused on oxygen vacancies (V-O). The role of another intrinsic TiO2 vacancy [i.e., titanium vacancies (V-Ti)] with regard to the Li+ storage behavior of TiO2 has largely evaded attention. Hence, a comparison of V-O- and V-Ti-defective TiO2 can provide valuable insight into how these two types of defects affect Li+ storage behavior. To eliminate other factors that may also affect the Li+ storage behavior of TiO2, we carefully devised synthesis protocols to prepare TiO2 with either V-O (n-TiO2) or V-Ti (p-TiO2). Both TiO2 materials were verified to have a very similar morphology, surface area, and crystal structure. Although V-O provided additional sites that improved the capacity at low C-rates, the benefit obtained from over-lithiation turned out to be detrimental to cycling stability. Unlike V-O, V-Ti could not serve as an additional lithium reservoir but could significantly improve the rate performance of TiO2. More importantly, the presence of VTi prevented over-lithiation, significantly improving the cycling stability of TiO2. We believe that these new insights could help guide the development of highperformance TiO2 for LIB applications. | - |
dc.description.sponsorship | This work was supported by a grant from the Basic Science Research Program through the National Research Foundation (NRF) of Korea funded by the Ministry of Science and ICT (NRF-2019R1A2C1003429, NRF-2020R1C1C1008588, and NRF-2020R1C1C1005618) and by the Ministry of Education (NRF-2018R1A6A1A03024231) . | - |
dc.language | en | - |
dc.publisher | American Chemical Society | - |
dc.subject | n-TiO2 | - |
dc.subject | p-TiO2 | - |
dc.subject | storage | - |
dc.subject | over-lithiation | - |
dc.subject | vacancy | - |
dc.subject | defect engineering | - |
dc.title | Exploring the Effect of Cation Vacancies in TiO2: Lithiation Behavior of n-Type and p-Type TiO2 | - |
dc.type | Article | - |
dc.relation.no | 5 | - |
dc.relation.volume | 14 | - |
dc.identifier.doi | 10.1021/acsami.1c20265 | - |
dc.relation.page | 6560-6569 | - |
dc.relation.journal | ACS Applied Materials and Interfaces | - |
dc.contributor.googleauthor | Lee, Moo Dong | - |
dc.contributor.googleauthor | Lee, Geun Jun | - |
dc.contributor.googleauthor | Nam, Inho | - |
dc.contributor.googleauthor | Abbas, Muhammad A. | - |
dc.contributor.googleauthor | Bang, Jin Ho | - |
dc.sector.campus | E | - |
dc.sector.daehak | 과학기술융합대학 | - |
dc.sector.department | 화학분자공학과 | - |
dc.identifier.pid | jbang | - |
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