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Critical Binder-to-Powders Coverage Ratio for Faster Graphite/SiOx Electrode Formulation Optimization
Clément Meyssonnier1,2, Amina Merabet1, Nicolas Dupré1
1Nantes Université, CNRS, Institut des Matériaux de Nantes Jean Rouxel, IMN, Nantes, F-44000, France.
Small Methods
|December 15, 2023
Summary
Optimizing battery electrode formulations is simplified by a new binder-to-powders coverage ratio. This approach enhances electrode performance and capacity retention, particularly in advanced electrolyte systems.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Science
Background:
- Electrode formulation is critical for battery performance but complex.
- Optimizing inactive additives like binders requires careful adjustment for each electroactive material composition.
Purpose of the Study:
- Introduce and validate a new electrode formulation parameter: the binder-to-powders coverage ratio.
- Simplify the optimization of binder content in electrode formulations.
Main Methods:
- Applied micromechanical models from polymer-based composite materials.
- Tested the binder-to-powders coverage ratio concept on SiOx/Graphite electrode blends.
- Evaluated electrode performance with different graphite types and binders (polyacrylic acid, styrene-butadiene rubber).
Main Results:
- The binder-to-powders coverage ratio effectively guides electrode formulation.
- Optimal coverage ratio achieved satisfactory capacity retention in full cells.
- Successful validation with different graphite materials and binder types.
Conclusions:
- The binder-to-powders coverage ratio is a valid and useful parameter for electrode formulation.
- This method aids in achieving high-performance electrodes, even with ethylene carbonate-free electrolytes.
