Silicon powders are already out there. https://www.cnbc.com/2019/03/15/battery-start-ups-are-raising-millions-in-the-battle-to-crush-tesla.html
Sounds like nano powders are already a thing. Are we touting we can do it cheaper?
"What’s more, most lithium-ion batteries with graphite anodes have a charge-rate, or C rate, of less than 1 percent. Start-ups developing new cells with silicon anodes say the C rates of their batteries are much better, a key differentiator to enabling an electric-vehicle future, since most people don’t want to wait around more than an hour for a car to charge when pumping gas takes just minutes.
“We can sustain a charge rate 10 times as fast as a conventional graphite cell,” said Robert A. Rango, CEO of Enevate.
The Irvine, California-based company creating a next-generation lithium-ion batteries with silicon anodes is armed with $111 million in funding, which includes an investment made last year by South Korea battery company LG Chem. Rango said Enevate, whose batteries have been in the works for 10 years, is about a year and a half away from the first commercial deployments of its technology, most likely in electric bikes and scooters.
Still, silicon anode batteries have one potential drawback: Silicon material swells, which means every charge causes the battery to deteriorate. It’s a problem both Berdichevsky and Rango said their respective companies have solved.
“Silicon does expand, and that’s been one of the challenges of the industry,” Rango said. “In our cells, we’ve been able to contain the expansion. Our cells have specifications that meet electric-vehicle requirements.” Those requirements? That a battery is able to charge to 80 percent after it has been charged and discharged 1,000 times."