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Advanced inorganic lithium metasilicate binder for high-performance silicon anode
Xiangxiang Wang1, Kun Wang1, Zefan Zheng1
1Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; Institute of Zhejiang University-Quzhou, Zheda Road 99, Quzhou 324000, China.
Journal of Colloid and Interface Science
|August 27, 2023
Summary
A novel lithium metasilicate (LS) binder enhances silicon anodes for lithium-ion batteries by improving stability and ion diffusion. This innovation addresses volume expansion issues, paving the way for high-performance silicon anodes.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- Silicon (Si) is a promising high-capacity anode material for next-generation lithium-ion batteries.
- Significant challenges include Si anode's large volume expansion (>300%) and poor lithium-ion (Li+) diffusion.
Purpose of the Study:
- To develop a novel inorganic binder to overcome the limitations of silicon anodes.
- To enhance the electrochemical performance and cycling stability of silicon anodes.
Main Methods:
- Development of lithium metasilicate (LS) as an inorganic binder.
- Investigating the compatibility and interaction between LS binder and silicon nanoparticles (SiNPs).
- Electrochemical testing of Si anodes with LS binder.
Main Results:
- LS binder shows favorable compatibility and strong adhesion with SiNPs, enhancing cycling stability.
- Si anode with LS binder achieved an average discharge capacity of 2123 mAh/g at 0.84 A/g after 100 cycles.
- LS binder facilitates Li+ diffusion, resulting in an average discharge capacity of 663 mAh/g at 8.4 A/g.
Conclusions:
- Lithium metasilicate is an effective inorganic binder for silicon anodes.
- This work presents a new approach for designing inorganic binders for advanced silicon anodes.
- The developed binder contributes to the advancement of high-performance silicon anode technology.
