For the most advanced EV batteries
on the globe.
A collection of technologies to produce silicon nanowires fused directly onto the commercial graphite particles used in the anodes of EV batteries. These technologies “supercharge” the amount of energy stored, the speed of charging, and power delivered.
Because it can store ten times more energy than graphite alone, silicon is starting to be deployed in a few EV models. Due to technical challenges, however, it’s limited to only a small amount and only modest improvements in battery performance. Efficiently adding larger amounts of silicon is now viewed as the essential breakthrough needed to produce competitive EVs that meet market demand for high performance across entire EV product lines. While other solutions cannot meet the technical and economic near-term challenges, SINANODE silicon nanowire technology can.
MORE SUSTAINABLY PROCESSED
The prevalent methods include mixing silicon oxide particles or carbon-coated nano-silicon particles with the graphite. These approaches rely on special polymers to stabilize or prevent silicon fracturing and electrical isolation. They are limited by one or more of several key factors: amount of silicon added or accessible, manufacturing scale or cost, and lack of compatibility with the large investments across the EV supply chains.
Furthermore, these solutions must be single-sourced and do not provide EV makers the ability to offer fully differentiated, customized high performance EV batteries produced in multiple factories supplied by multiple material suppliers.
A better solution is needed.
The solution is
Silicon nanowires are electrical wires orders of magnitude smaller than human hair. Using only silane (a gas produced from metallurgical grade silicon and available from multiple suppliers), nitrogen, and modest amounts of electricity, the SINANODE process attaches silicon nanowires directly onto the graphite much like plugging an electrical cord into an outlet. When charged, silicon nanowires remain pliant and do not crack. With hundreds of thousands of wires on each graphite particle, the silicon triples the energy density of the anode.
SINANODE redefines the performance and cost of the battery while leveraging every aspect of the current value chain, both in the graphite powders already produced at large scale and existing manufacturing investments. In fact, the SINANODE process is agnostic as to which graphite is used and to the size of the graphite particle. Uniform dispersion of silicon is built in to the SINANODE process regardless of particle size.
Silane, using already proven production equipment, achieves high yields and reduces the anode cost (in $ per kWh). More importantly, the resulting silicon-graphite composite anode material can immediately be used with existing industrial scale electrode coating equipment and it is compatible with the other materials, cell design specifications, and processes used in today’s EV cells factories.
Specifically, a SINANODE pilot manufacturing capacity of 300 tons (300,000 Kg) of 20% silicon and 80% graphite anode material provides an energy storage capacity of 1 GWh in lithium batteries. When mixed with pure graphite, the silicon nanowire / graphite composite material achieves greater first cycle efficiency and better cycling at a lower cost than even the highest energy density EV cells in production today. This unique performance was verified by leading EV companies during 2019 and 2020, paving the way to large scale production targets.
that doesn’t disrupt.
Using SINANODE not only reduces the weight of EV batteries, but it reduces the carbon footprint. A greater silicon-to-graphite ratio lowers the CO2 produced per kWh of battery manufactured.