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An enhanced double carbon layer-coated silicon-based anode for lithium-ion batteries
Xingyue Qian1, Siqi Hou1, Weiyan Li1
1Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou, Jiangsu Province 213164, China. hegy@cczu.edu.cn.
Dalton Transactions (Cambridge, England : 2003)
|September 1, 2025
Summary
Researchers developed a novel silicon anode for lithium-ion batteries (LIBs) using a double-layer carbon structure. This design enhances cycle life and performance, overcoming key limitations for next-generation energy storage.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Silicon anodes are promising for next-generation lithium-ion batteries (LIBs) due to high capacity.
- Commercialization is hindered by poor cycle life and rate performance.
Purpose of the Study:
- To develop a stable and high-performance silicon anode for LIBs.
- To address volume expansion and conductivity issues in silicon anodes.
Main Methods:
- Synthesized a Si@rGO@PNC/C composite with a double-layer carbon structure.
- Employed secondary coating and high-temperature calcination.
- Combined graphene-coated silicon nanoparticles with needle coke and pitch.
Main Results:
- Achieved a high specific capacity of 1043.0 mA h g⁻¹ at 200 mA g⁻¹.
- Demonstrated superior rate performance with 84.3% capacity retention.
- Exhibited excellent cycling stability due to the unique double-layer carbon structure.
Conclusions:
- The Si@rGO@PNC/C composite effectively mitigates silicon anode limitations.
- The double-layer carbon structure provides structural integrity and enhanced conductivity.
- This work offers insights for designing advanced silicon anodes for LIBs.
