From faster charging to longer range: 4 types of silicon tech that’ll revolutionize EV batteries
Silicon-lithium batteries could be a game changer
Nano-porous silicon
Dutch scaleupE-Magymanufactures structured silicon particles with nano-scale pores that don’t swell and break.
It claims that with its technology EV batteries can enjoy 40% higher energy density and up to five times faster charging without any impact on battery lifetime.
The company has already run the first production series, and at its current facility it’s possible to produce 25 tons of silicon plates — enough for 4,000 electric car batteries.
A new facility is expected in 2024, aiming for a mass production of multi-thousand tons.
Silicon nanowires
California-based startupOneD Battery Scienceshas produced silicon nanowires that can be fused directly onto the commercial graphite particles found in the anodes of batteries.
This technology promises three main benefits:
Currently, the silicon nanowires are available to OEMs through a dedicated pilot production program, while fully commercial production is expected in 2025.
Silicon-carbon powder
Washington-based startupGroup14has developed a special silicon-carbon powder, dubbed SCC55.
Thanks to its hard carbon-based scaffolding, the silicon is kept in an amorphous and nano-sized form. This enables the SCC55 to deliver five times the capacity and up to 50% the energy density of a graphite anode.
Interestingly, the composite can be used both for any blend ratio with graphite, or as a complete replacement for it.
The company has already been shipping its product to OEMs, and it’s planning to build two more factories that will produce 12,000 tons per year.
Silicon nano particles
Sila Nanotechnologiesin China has engineered special silicon nano particles to partially or fully replace graphite in the battery’s anode.
According to the company, these particles eliminate the swelling and contraction of silicon, while keeping the electrolyte outside, which means that the material could be cycled 1,000 to 10,000 times without unwanted side reactions.
As a result, its technology enables a 20% to 40% increase in energy density, which allows an EV battery to store significantly more energy in the same space, improving range.
Sila has recentlystarted working with Mercedes, which will use the silicon-based anode batteries in its electric G-Class series.
What’s really hopeful is that all three companies have designed their solutions in such a way that allows them to be scaled-up using existing manufacturing and supply chain processes.
This means that these technologies can be manufactured in high volumes at a fast clip, without investing time and money to retool production lines. That way, we won’t have to wait too long to find out if silicon can actually deliver its potential to bring us closer to faster-charging and longer-range EVs.
Story byIoanna Lykiardopoulou
Ioanna is a writer at TNW. She covers the full spectrum of the European tech ecosystem, with a particular interest in startups, sustainabili(show all)Ioanna is a writer at TNW. She covers the full spectrum of the European tech ecosystem, with a particular interest in startups, sustainability, green tech, AI, and EU policy. With a background in the humanities, she has a soft spot for social impact-enabling technologies.
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