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Updated: Jul 19, 2025
Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
Design of SiOx/TiO2@C hierarchical structure for efficient lithium storage
Junhui Zou1, Shuai Yuan1, Ying Huang1
1MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China.
This study developed a novel silicon monoxide (SiO)-based anode material by doping with titanium dioxide (TiO2) and coating with carbon. The resulting SiO/TiO2@C composite demonstrates enhanced stability and capacity for lithium-ion batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Silicon monoxide (SiO)-based anode materials suffer from significant volume expansion and unstable solid electrolyte interface (SEI) films during lithiation, limiting their commercial viability.
- Composite doping strategies are effective for addressing critical performance issues in advanced battery materials.
Purpose of the Study:
- To synthesize and characterize a novel core-shell SiO/TiO2@C composite anode material.
- To investigate the effects of TiO2 doping and carbon coating on the electrochemical performance of SiO-based anodes.
Main Methods:
- Sol-gel method was employed to create the TiO2-doped core-shell SiO/TiO2@C composites.
- Electrochemical testing, including cycling stability and rate capability, was performed to evaluate the material's performance.
Main Results:
- The SiO/TiO2@C composite exhibited a high reversible capacity of 828.2 mA h g⁻¹ at 0.2 A g⁻¹ over 100 cycles.
- Even after 500 cycles at a high current density of 2 A g⁻¹, the composite maintained a reversible capacity of 500 mA h g⁻¹.
- Uniformly dispersed TiO2 nanoparticles and the outer carbon shell effectively mitigated volume expansion and improved ion/electron transport.
Conclusions:
- The developed SiO/TiO2@C composite demonstrates excellent electrochemical stability and high capacity, addressing key limitations of SiO-based anodes.
- The synergistic effects of TiO2 doping and carbon coating offer a promising pathway for next-generation high-performance lithium-ion battery anodes.
