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나노입자 연구단
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Facile synthesis of metal hydroxide nanoplates and their application as lithium-ion battery anodes

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Title
Facile synthesis of metal hydroxide nanoplates and their application as lithium-ion battery anodes
Author(s)
Dong Jun Lee; Seung-Ho Yu; Hyeon Seok Lee; Aihua Jin; Jisoo Lee; Ji Eun Lee; Yung-Eun Sung; Taeghwan Hyeon
Publication Date
2017-05
Journal
Journal of Materials Chemistry A, v.5, no.18, pp.8744 - 8751
Publisher
ROYAL SOC CHEMISTRY
Abstract
We report a facile approach to synthesize hexagon-shaped nanoplates of various metal (oxy)hydroxides under aqueous solutions while avoiding complex processes. This synthetic method can be generally applied to fabricate various nanoplates, including not only single-metallic (oxy)hydroxides such as Co(OH)2, MnO(OH), FeO(OH), and Mg(OH)2 but also mixed-metal (oxy)hydroxides, where each metal component is homogeneously distributed and the atomic ratio of the metal species can be easily controlled by varying the precursor ratio. Carbon-coated metal oxide nanoplates, which are prepared by coating of polydopamine followed by heat treatment, are applied as anode materials for lithium-ion batteries (LIB). Core–shell nanoplates of CoO@C, MnO@C and Fe3O4@C exhibit excellent cycle stability with a high specific capacity of 1000 mA h g1. In particular, the effect of carbon shell thickness on electrochemical performance is studied using CoO@C nanoplates with different carbon shell thicknesses. CoO@C with a 6.5 nm-thick carbon coating exhibits good cycling performance and maintains a high rechargeable capacity of 997 mA h g1 even after 100 cycles at a current density of 200 mA g1, while CoO@C with a 1.5 nm-thick carbon shell shows a significantly decreased capacity of 315 mA h g1 after the 100th cycle. This journal is © The Royal Society of Chemistry 2017
URI
https://pr.ibs.re.kr/handle/8788114/4353
ISSN
2050-7488
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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