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

Dong Jun Lee, Seung-Ho Yu, Hyeon Seok Lee, Aihua Jin, Jisoo Lee, Ji Eun Lee, Yung Eun Sung, Taeghwan Hyeon

Research output: Contribution to journalArticle

17 Citations (Scopus)

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 Fe 3 O 4 @C exhibit excellent cycle stability with a high specific capacity of ∼1000 mA h g -1 . 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 g -1 even after 100 cycles at a current density of 200 mA g -1 , while CoO@C with a 1.5 nm-thick carbon shell shows a significantly decreased capacity of 315 mA h g -1 after the 100th cycle.

Original languageEnglish
Pages (from-to)8744-8751
Number of pages8
JournalJournal of Materials Chemistry A
Volume5
Issue number18
DOIs
Publication statusPublished - 2017 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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