Particle-Size Mixing Routes to Stable Silicon Anodes for Lithium-Ion Batteries
Researchers at Montana State University have developed a novel method for creating majority silicon electrodes with high electrochemical stability, enabling long-lasting, high-capacity lithium-ion batteries.
Status: Available for Licensing and/or Collaboration
Background
Silicon is a promising alternative to graphite as the anode material in lithium-ion batteries due to its high lithiation capacity (~10 times that of graphite), low redox potential, and abundance. However, its extreme volume expansion during cycling (>300%) causes electrode instability, rapid capacity loss, and challenges in maintaining electrical connectivity. This invention introduces a cost-effective solution that leverages optimized particle-size mixing to overcome these limitations, enabling stable, high-performance silicon electrodes directly from powder precursors.
Technology Overview
This invention combines silicon nanoparticles (NPs) and microparticles (MPs) in optimized ratios (e.g., 3:7) to create stable silicon electrodes. The mixed particle sizes synergistically enhance binding properties and porosity, mitigating the effects of volume expansion and improving cycling stability. Using standard carbonate-based electrolytes with fluoroethylene carbonate (FEC) additives, the electrodes retain >85% of their original capacity over hundreds of cycles. The method is compatible with industry-standard slurry-casting techniques and can be extended to other high-volume expansion electrode materials for lithium-ion and beyond-lithium battery chemistries.
Benefits
- Enables stable, high-capacity silicon anodes with extended cycle life.
- Reduces reliance on expensive pure nanoparticles by using majority microparticles.
- Provides a scalable solution compatible with existing battery manufacturing processes.
- Improves energy density and performance for advanced battery applications.
Applications
- High-performance lithium-ion batteries for electric vehicles and portable electronics.
- Development of next-generation batteries, including sodium-ion and solid-state chemistries.
- Research and manufacturing of advanced anode materials for energy storage systems.
Opportunity
Available for license: methods for electrode fabrication, optimized particle-size mixing strategies, and supporting data. Collaborative opportunities include optimization for specific applications, scale-up, and integration into commercial battery production.
IP Status
Provisional patent application filed. Available for licensing and/or collaboration.
Contact
Tess Kirkpatrick
(406) 994-7775