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Updated: Aug 1, 2026
05:33
Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
Interfacially Reinforced Crosslinked Binder with Structural Integrity for Stable Micro-Sized Silicon Anodes in
Chanho Lee1, Yuri Nam1, Incheol Jeong2
1School of Chemical, Biological and Battery Engineering, Gachon University, Seongnam, Republic of Korea.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|March 3, 2026
Summary
A novel crosslinked binder stabilizes micro-sized silicon anodes in all-solid-state batteries, significantly improving their cycling stability and capacity retention for next-generation energy storage.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- All-solid-state batteries (ASSBs) offer high energy density and safety but face challenges with solid-solid interfaces and anode degradation.
- Micro-sized silicon (µSi) anodes, promising for high capacity, suffer from large volume changes and poor interfacial contact during cycling.
Purpose of the Study:
- To develop an interfacially reinforced crosslinked binder (IRCB) for stabilizing µSi anodes in ASSBs.
- To address both mechanical integrity and interfacial stability issues in µSi anodes.
Main Methods:
- Synthesized IRCB via crosslinking 1,4-butanediol diglycidyl ether and ethylenediamine, creating a 3D polymer network.
- Fabricated carbon-free µSi anodes using the IRCB binder.
- Evaluated electrochemical performance and interfacial stability with sulfide solid electrolytes.
Main Results:
- IRCB-based µSi anodes demonstrated 90% capacity retention after 300 cycles at 1 C, a significant improvement over conventional PVDF binders (16% retention).
- The 3D polymer network enhanced mechanical constraint, maintained interparticle contact, and facilitated Li+ transport.
- IRCB effectively mitigated particle displacement and suppressed interfacial degradation with sulfide solid electrolytes.
Conclusions:
- Rational binder engineering with IRCB is crucial for achieving stable and high-performance µSi anodes in ASSBs.
- IRCB successfully overcomes the limitations of solid-solid interfacial contact and chemomechanical degradation in µSi anodes.
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