Synthesis of SiO(x) powder using DC arc plasma
1Department of Chemical Engineering and Regional Innovation, Center for Environmental Technology of Thermal Plasma (RIC-ETTP), INHA University, 253 Yonghyun-Dong, Nam-Gu, Incheon 402-751, Republic of Korea.
Journal of Nanoscience and Nanotechnology
|May 8, 2013
Summary
Silicon monoxide (SiO(x)) was synthesized using DC arc plasma for lithium-ion battery anodes. The material exhibited amorphous SiO(x) and crystalline Si phases, with wire and spherical morphologies, showing promise for battery applications.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Silicon monoxide (SiO(x)) is a promising anode material for lithium-ion batteries due to its high theoretical capacity.
- Challenges remain in controlling its synthesis and understanding its electrochemical behavior.
Purpose of the Study:
- To synthesize SiO(x) using DC arc plasma with controlled stoichiometry.
- To characterize the structural, morphological, and bonding properties of the synthesized SiO(x).
- To investigate the electrochemical performance of SiO(x) as a lithium-ion battery anode.
Main Methods:
- DC arc plasma synthesis of SiO(x) from Si and SiO2 mixtures.
- Characterization using X-ray diffraction (XRD), FE-SEM, EDS, TEM, and XPS.
- Electrochemical performance evaluation in lithium-ion battery configuration.
Main Results:
- Amorphous SiO(x) with crystalline Si phases was successfully synthesized.
- Wire and spherical morphologies were observed.
- XPS analysis indicated an 'x' value close to one, suggesting silicon monoxide.
- Thermodynamic equilibrium calculations supported the experimental findings.
Conclusions:
- DC arc plasma is an effective method for producing SiO(x) anode materials.
- The synthesized SiO(x) possesses suitable structural and morphological characteristics for lithium-ion batteries.
- Further investigation into the electrochemical behavior of this silicon monoxide anode is warranted.
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