HIGH PERFORMANCE MATERIALS

Premium, affordable, sustainable and scalable silicon anode materials

We produce a silicon-carbon composite using a top-down approach for the silicon particles and a build-on-top method for the matrix. The process can be summarized as follows: reducing the size of metallurgical silicon, integrating it with carbon precursors, and performing a calcination step to create the matrix around well-dispersed silicon nanoparticles.

Today we offer Si/C composite materials with a discharge capacity of 1700 mAh/g.

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ABOUT THE EXTRA MILE

The Extra Mile, Umicore's battery anode materials project, delivers top-performance anode materials at the right price, ready for industrialization, with a clear innovation roadmap to drive future success.

1700GF

1700GF
Si/C composite: 1700 mAh/g

SOP 2028: Our flagship product that has been tested and approved by leading battery cell makers in multiple demanding industries. Past the first hype. At pack level.

MATERIAL CHARACTERISTICS

Advanced composite design for high-performance anodes​

Silicon nanoparticles

Nanoparticles of silicon (average size 50 nm and smaller than 100nm) are individually separated and homogeneously dispersed within micrometric-sized particles. The nanoparticles have a stabilized interface with the carbon matrix and have a very low oxygen content.

Carbon matrix

The elastic, conductive, and non-porous carbon matrix absorbs volume changes of silicon during lithiation and delithiation, preventing cracking and enabling fast-charging. Its strong Si-C bonding ensures structural integrity and sustained contact between silicon and carbon, resulting in high stability and long cycle life.

Composite surface

The surface is composed of carbon, with no silicon present on the composite's surface. This ensures no direct contact between silicon and the electrolyte and it facilitates easier integration and mixing of the material with graphite during electrode preparation.

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STATE-OF-THE-ART TECHNOLOGY

Umicore Si/C is easy to integrate


Having a surface similar to graphitic particles, EMM's Si/C material enables homogeneous blends and prevents gas formation. 1700GF has a superior recovered capacity and lower DCR growth during storage versus the competition, leading to better safety and calendar lifetime.

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ABOUT THE EXTRA MILE

Premium, affordable, sustainable and scalable silicon anode materials.


Scaling EV production requires anode materials that can meet demand. The Extra Mile, Umicore’s battery anode materials project, delivers manufacturing of Si/C anode material with consistent quality, high capacity, and long cycle life by design.

With strong partners and a robust IP portfolio, we strive to lead global markets with a focus on process excellence and innovation.

Learn more about The Extra Mile