TESLA BD, page-239

"If anyone asks if NVX is working on silicon:In October 2018, the company signed a partnership with Dalhousie University to sponsor one of its battery research groups. That sponsorship has already begun to pay off, as Novonix has filed its first patent for silicon-infused graphite developed by the Dalhousie team.“For years and years, companies have been trying to put silicon into graphite to give the battery more capacity,” explained St Baker. “But the problem is the silicon expands and contracts and damages the graphite and [shortens] battery life. So this has been an ongoing problem that the industry has been dealing with. The guys working for us in Dalhousie have managed to get the silicon inside the graphite particles. Not only do they get the silicon inside the particles, but they do it in a manner which is very cheap.”https://chargedevs.com/features/battery-testing-start-up-novonix-has-spun-off-puregraphite-to-manufacture-anode-material-in-the-us/ "