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Published on: August 12, 2013
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Lignin-Based Semi-Interpenetrating Polymer Network as a Binder for High-Performance Lithium Metal Batteries
Xiaojie Xie1, Bailiang Xue1, Miaoyou Li1
1College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, Shaanxi, China.
Biomacromolecules
|September 19, 2025
Summary
A novel lignin-based binder enhances lithium metal battery performance by improving adhesion and stability. This sustainable material significantly boosts cycling stability, outperforming traditional binders for next-generation energy storage.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Chemistry
Background:
- Lithium metal batteries (LMBs) offer high energy density but face challenges with conventional binders like poly(vinylidene fluoride) (PVDF).
- Issues include poor adhesion, high crystallinity, and capacity fading, limiting LMB performance and lifespan.
Purpose of the Study:
- To develop a sustainable and high-performance binder for LMBs.
- To overcome the limitations of PVDF binders in LMB applications.
Main Methods:
- Synthesized a lignin-based semi-interpenetrating polymer network (SIPN) binder.
- Grafted polyethylene glycol methacrylate (PEGMA) and glycerol carbonate methacrylate (GCMA) onto lignin-based chain transfer agents (L-CTA) via RAFT polymerization.
- Cross-linked with polyamine and integrated with PVDF.
Main Results:
- The SIPN binder reduced PVDF crystallinity, enhancing adhesion and ionic conductivity.
- LMBs with the SIPN-5 binder retained 96% capacity after 500 cycles at 2 C.
- This significantly outperformed the PVDF binder, which retained only 78% capacity.
Conclusions:
- Lignin-based SIPN binders offer a multifunctional and sustainable alternative for high-performance LMBs.
- The developed binder improves cycling stability and addresses key limitations of conventional binders.
