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| Type |
Poster Presentation |
| Area |
Electrochemistry |
| Room No. |
Grand Ballroom |
| Time |
10월 19일 (금요일) 11:00~12:30 |
| Code |
ELEC.P-462 |
| Subject |
Designing Hierarchical Assembly of Carbon-Coated TiO2 Nanocrystals and Unraveling the Role of TiO2/Carbon Interface in Lithium-Ion Storage in TiO2 |
| Authors |
Jeongmin Lee, Jin Ho Bang1,*
Department of Bionano technology, Hanyang University, Korea
1Department of Bionano Technology, Hanyang University, Korea
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| Abstract |
Owing to its high chemical stability, structural robustness, abundance, and high working voltage (~1.75 V vs. Li+/Li), anatase titanium dioxide (TiO2) has extensively been investigated as an anode material for lithium-ion batteries (LIBs). In addition, the hierarchical nanostructures of oxide-based electrode materials whose benefits are large surface area, synergistic interactions and high performance have been developed for LIBs. Despite the many benefits of hierarchical nanostructures of oxide-based electrode materials for LIBs, it remains a challenging task to fully exploit the advantages of such materials partly because of their intrinsically poor electrical conductivities. The resulting that limited electron supply to primary particles inside secondary microparticles gives rise to significant variation in lithium-ion (Li+) storage capability within the nanostructured particles. To address this, facile annealing, where in situ generated carbon-coated primary particles were assembled into porous microagglomerates, is demonstrated to prepare nanostructured TiO2. A systematic study on the effect of the carbon coating reveals that it is exclusively governed by the characteristics of the TiO2/carbon interface rather than by the nature of the carbon coating. This new insight serves as a stepping stone toward understanding an important, yet often overlooked effect of the oxide/carbon interface on Li+ storage kinetics, thereby demanding more investigation to establish a new design principle for carbon-coated oxide electrode materials.
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| E-mail |
lbk9209@naver.com |
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122nd General Meeting of the KCS