Synthesis of Multiphase Cu3Ge/GeOx/CuGeO3 Nanowires for Use as Lithium-Ion Battery Anodes

Gwang Hee Lee, Jae Chan Kim, Duk Hee Lee, Seung Deok Seo, Hyun Woo Shim, Dong-Wan Kim

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Multiphase nanowires composed of Cu3Ge, GeOx, and CuGeO3, obtained through the thermochemical reduction of CuGeO3, are investigated as anode materials for lithium-ion batteries. Initially, CuGeO3 nanowires are prepared by using a facile hydrothermal process without the use of any templates or surfactants. The as-prepared CuGeO3 nanowires are demonstrated to be single-crystalline with a diameter of around 70nm and a length of 0.5-2μm. Subsequently, multiphase Cu3Ge/GeOx/CuGeO3 nanowires are prepared through the controlled thermochemical reduction of the as-prepared CuGeO3 nanowires under a H2 atmosphere at 250°C. Upon thermochemical reduction, the wire-shaped morphology is retained, but the phase partially transforms to a mixture of crystalline Cu3Ge nano-domains (x. The newly generated multiphase nanowires exhibit enhanced cycle stability with high lithium-storage capability compared to that of the as-prepared CuGeO3 nanowires.

Original languageEnglish
Pages (from-to)673-678
Number of pages6
JournalChemElectroChem
Volume1
Issue number3
DOIs
Publication statusPublished - 2014 Mar 1
Externally publishedYes

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Keywords

  • Conducting materials
  • Energy storage
  • Nanostructures
  • Phase transitions
  • Thermochemistry

ASJC Scopus subject areas

  • Electrochemistry
  • Catalysis

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