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GeTe-TiC-C Composite Anodes for Li-Ion Storage.

Woo Seob Kim1, Thuan Ngoc Vo1, Il Tae Kim1

  • 1Department of Chemical and Biological Engineering, Gachon University, Seongnam-si, Gyeonggi-do 13120, Korea.

Materials (Basel, Switzerland)
|September 26, 2020
PubMed
Summary
This summary is machine-generated.

Germanium telluride (GeTe) composites with titanium carbide (TiC) and carbon (C) were developed as anodes for lithium-ion batteries. The GeTe-TiC-C anodes demonstrate improved cycling stability and capacity retention, showing promise for high-performance batteries.

Keywords:
anodesconductive matrixgermanium telluridelithium-ion batteriestitanium carbide

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Germanium offers high charge capacity for lithium-ion batteries but suffers from poor cycling life due to significant volume expansion.
  • Developing germanium composites is crucial to mitigate volume expansion and enhance battery performance.

Purpose of the Study:

  • To synthesize and characterize germanium telluride (GeTe) composites with titanium carbide (TiC) and carbon (C) as potential anode materials for lithium-ion batteries.
  • To evaluate the electrochemical performance, particularly cycling stability and capacity retention, of the developed GeTe-TiC-C anodes.

Main Methods:

  • High-energy ball milling (HEBM) was used to prepare GeTe-TiC-C alloy composites.
  • Electron microscopy and X-ray powder diffraction were employed for structural and morphological characterization.
  • Electrochemical testing, including cycling performance and rate capability, was conducted for lithium-ion cells.

Main Results:

  • The GeTe-TiC-C composites showed uniform distribution of GeTe and TiC within the carbon matrix.
  • GeTe-TiC-C anodes, especially with 20% and 30% TiC, exhibited significantly improved reversible cyclability (847 and 614 mAh g⁻¹ after 400 cycles, respectively).
  • Stable capacity retentions of 78% and 82% were achieved at 10 A g⁻¹ for GeTe-TiC (20%)-C and GeTe-TiC (30%)-C, respectively.

Conclusions:

  • The addition of TiC to GeTe significantly enhances the electrochemical performance and cycling stability of anodes for lithium-ion batteries.
  • The developed GeTe-TiC-C composites are promising anode candidates for high-performance lithium-ion battery applications.