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Published on: November 11, 2013
Interface-Amorphized Ti3C2@Si/SiO@TiO2 Anodes with Sandwiched Structures and Stable Lithium Storage
Min Jiang1, Fangzhou Zhang1, Guanjia Zhu1
1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, Donghua University, Shanghai 201620, China.
A novel MXene-silicon composite with a unique sandwiched structure enhances lithium-ion battery performance. This advanced anode material demonstrates excellent capacity retention and promising application prospects.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Silicon anodes offer high theoretical capacity for lithium-ion batteries but suffer from poor cycling stability due to volume expansion and electrolyte decomposition.
- MXenes, like Ti3C2Tx, possess excellent electrical conductivity and a large surface area, making them promising conductive additives for energy storage applications.
Purpose of the Study:
- To develop a stable and high-performance anode material for lithium-ion batteries by combining MXene, porous silicon, SiO2, and TiO2.
- To investigate the synergistic effects of a multi-component, sandwiched composite structure on electrochemical performance.
Main Methods:
- Synthesis of a Ti3C2@Si/SiO2@TiO2 composite material with a specific sandwiched architecture.
- Electrochemical characterization of the composite as an anode material in lithium-ion batteries, including cycling performance and capacity retention tests.
Main Results:
- The Ti3C2@Si/SiO2@TiO2 composite exhibited a high reversible capacity of 939 mA h g-1 after 100 cycles.
- The unique sandwiched structure effectively mitigated the volume expansion of silicon and improved capacity retention, especially in the initial cycles.
Conclusions:
- The developed Ti3C2@Si/SiO2@TiO2 composite demonstrates superior electrochemical performance and stability for lithium-ion battery anodes.
- This multi-component material holds significant promise for advancing next-generation high-energy-density lithium-ion batteries.
