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High-performance polymer binders for silicon-based anodes: Advances in molecular design and applications
Yuhan Zheng1, Guo Lin1, Tao Wang1
1College of Materials and New Energy, Chongqing University of Science and Technology, Chongqing 401331, China.
Journal of Colloid and Interface Science
|December 3, 2025
Summary
Molecular engineering of polymer binders is key to overcoming silicon anode volume expansion challenges in lithium-ion batteries (LIBs). This strategy enhances stability and capacity fading for better battery performance.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- Silicon anodes offer high energy density for lithium-ion batteries (LIBs) due to their 4200 mAh/g theoretical capacity.
- Significant volume expansion (~300%) during cycling causes electrode degradation and capacity fade, hindering commercial use.
Purpose of the Study:
- To review current polymer binder strategies for silicon anodes.
- To analyze molecular tailoring techniques and their impact on electrochemical performance.
Main Methods:
- Exploration of intrinsic material modifications: nano-structuring, carbon coating, alloying, and polymer binders.
- Focus on polymer binder categories and molecular tailoring (graft modification, crosslinking, copolymerization).
- Analysis of operational principles and molecular interactions through structural design.
Main Results:
- Nano-structuring and alloying address volume strain mechanically.
- Carbon coating and polymer binders provide extrinsic confinement and improve electrical conductivity.
- Molecular engineering significantly impacts silicon anode electrochemical behavior.
Conclusions:
- Advanced binder strategies like graft modification, crosslinking, and copolymerization are crucial.
- Understanding molecular interactions is vital for designing high-performance silicon anodes.
- This review provides theoretical and practical guidance for binder technology advancement in LIBs.
