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Two-dimensional assemblies of ultrathin titanate nanosheets for lithium ion battery anodes

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Title
Two-dimensional assemblies of ultrathin titanate nanosheets for lithium ion battery anodes
Author(s)
Seung-Ho Yu; Mihyun Park; Hyun Sik Kim; Aihua Jin; Mohammadreza Shokouhimehr; Ahn T.-Y.; Kim Y.-W.; Taeg Hwan Hyeon; Yung Eun Sung
Publication Date
2014-06
Journal
RSC ADVANCES, v.4, no.24, pp.12087 - 12093
Publisher
ROYAL SOC CHEMISTRY
Abstract
Ultrathin titanate nanosheets of 0.5 nm thickness were successfully synthesized from the non-hydrolytic sol-gel reaction of tetraoctadecyl orthotitanate via a heat-up method. The synthesized nanosheets were easily assembled to be layer structures by being reacted with hydroxide ions in basic solutions such as LiOH, NaOH, and KOH. The hydrophobic surface of the titanate nanosheets was also modified to be a hydrophilic surface through an assembly process. The layer structured nanosheets were employed as anode materials for lithium ion batteries to visualize fast charging and discharging effects utilizing 2D structured electrodes, and stable cycling induced the mechanically stable layered structure. The ultrathin morphology of the 2D titanate electrodes affected not only the diffusion path of Li ions but also the reaction mechanism from the insertion reaction of the crystal interior to the surface reaction. Furthermore, the electrodes of the layer structured nanosheets had superior cycling and rate performances. © 2014 The Royal Society of Chemistry.
URI
https://pr.ibs.re.kr/handle/8788114/995
ISSN
2046-2069
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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