Related Experiment Video
Updated: May 16, 2025
Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
Stable Silicon Anodes Enabled by Innovative Biobased Binder with Cross-Linking Network in Lithium-Ion Batteries
Wengxiang Ai1, Chunman Yang1, Qian Wang1
1National Local Joint Engineering Research Center for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Batteries Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, PR China.
A new HM binder made from sodium hyaluronate and malic acid enhances silicon anodes for lithium-ion batteries. This binder improves cycling stability and capacity, overcoming silicon
Area of Science:
- Materials Science
- Electrochemistry
- Chemical Engineering
Background:
- Graphite anodes are nearing theoretical capacity limits.
- Silicon anodes offer 10x higher capacity but suffer from >300% volume expansion during cycling.
- Existing binder synthesis methods are complex and not scalable.
Purpose of the Study:
- To develop an innovative, scalable binder for silicon anodes.
- To address the challenges of volume expansion and poor cycling stability in silicon anodes.
- To improve the practical deployment of silicon anodes in lithium-ion batteries.
Main Methods:
- Synthesized an in-situ cross-linked binder (HM) from sodium hyaluronate and malic acid.
- Utilized heat treatment under vacuum to form a robust network structure.
- Investigated the binder's mechanical properties and its effect on silicon particle volume change.
- Performed electrochemical characterization of Si@HM electrodes.
Main Results:
- The HM binder formed a stable network via hydrogen bonds and chemical interactions.
- HM binder significantly reduced silicon volume expansion, promoting a stable solid electrolyte interphase.
- Si@HM electrodes maintained high capacities (1949 mA h g-1 at 0.1 C, 1426 mA h g-1 at 0.5 C) after 100 cycles.
- Demonstrated superior rate performance and reduced internal resistance compared to conventional binders.
Conclusions:
- The HM binder offers exceptional mechanical properties and electrochemical stability for silicon anodes.
- This binder design facilitates the commercialization of high-capacity silicon anodes.
- Provides valuable insights for future binder development in advanced battery technologies.
