Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 이상욱 | - |
dc.date.accessioned | 2021-08-31T07:20:19Z | - |
dc.date.available | 2021-08-31T07:20:19Z | - |
dc.date.issued | 2020-08 | - |
dc.identifier.citation | NANO ENERGY, v. 74, Article no. 104829, 12pp | en_US |
dc.identifier.issn | 2211-2855 | - |
dc.identifier.uri | https://www.sciencedirect.com/science/article/pii/S2211285520303864 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/164756 | - |
dc.description.abstract | Despite its great potential, the use of TiO2 in lithium-ion batteries has been hampered by its intrinsically low electrical and ionic conductivities. Although nitrogen doping (N-doping) has been widely practiced to address this issue, a comprehensive understanding of how N-doping improves those poor intrinsic properties is still lacking. For this work, we performed a computational study and found that the N-doping effect relies intimately on where the N is implanted in the TiO2 lattice: interstitial N is more beneficial than substitutional N in enhancing those conductivities. Therefore, we devised a new N-doping strategy based on a self-N-doping route that enables subtle tuning of the nitrogen distribution in TiO2. Unlike conventional N-doping methods that leave the doped N predominantly on the surface, our new approach enables the preferential implantation of interstitial N into the interior of TiO2. In-depth electrochemical analyses combined with physical characterization reveal that this unique falling gradient N-doping from the core to the surface is more beneficial than the common rising gradient N-doping in enhancing the performance of TiO2 in lithium ion batteries. This new insight highlights the importance of crystallographic location and spatial distribution in N-doping, which will form the foundation of a new design principle for high-performance N-doped TiO2. | en_US |
dc.description.sponsorship | This research was supported by grants from the Basic Science Research Program through the National Research Foundation (NRF) of Korea funded by the Ministry of Science and ICT (NRF- 2019R1A2C1003429 and NRF-2018R1A2B6006320) and by the Minis-try of Education (NRF-2018R1A6A1A03024231). | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | Elsevier Ltd | en_US |
dc.subject | Anatase TiO2 | en_US |
dc.subject | N-doping | en_US |
dc.subject | Spatial distribution | en_US |
dc.subject | Electrical conductivity | en_US |
dc.subject | Lithium-ion diffusion | en_US |
dc.title | Designing a high-performance nitrogen-doped titanium dioxide anode material for lithium-ion batteries by unravelling the nitrogen doping effect | en_US |
dc.type | Article | en_US |
dc.relation.volume | 74 | - |
dc.identifier.doi | 10.1016/j.nanoen.2020.104829 | - |
dc.relation.page | 104829-104840 | - |
dc.relation.journal | NANO ENERGY | - |
dc.contributor.googleauthor | Choi, Won Ho | - |
dc.contributor.googleauthor | Lee, Chi Ho | - |
dc.contributor.googleauthor | Kim, Hee-eun | - |
dc.contributor.googleauthor | Lee, Sang Uck | - |
dc.contributor.googleauthor | Bang, Jin Ho | - |
dc.relation.code | 2020048631 | - |
dc.sector.campus | E | - |
dc.sector.daehak | COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E] | - |
dc.sector.department | DEPARTMENT OF CHEMICAL AND MOLECULAR ENGINEERING | - |
dc.identifier.pid | sulee | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.