Sila Nano’s battery chemistry recipe replaces graphite in a battery cell’s anode with silicon to create a more energy-dense and cheaper battery pack. Other companies, like BASF, are focusing on creating a high energy dense cathode.
While numerous companies are working on a variety of different battery chemistries, they have yet to take over the traditional cell technology found in today’s lithium-ion cells. The Sila battery used in the upcoming Whoop 4.0, the company’s latest health and performance tracker, could be the first time in the last few decades the world has seen a next-generation battery chemistry ship to market.
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Sila Nano has joint battery ventures with BMW and Daimler to produce batteries containing the company’s silicon-anode technology, with the goal of going to market in the automotive industry by 2025.
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Whoop, which earlier this month announced a $200 million raise at a $3.6 billion valuation, is introducing the Whoop 4.0 as a wearable that’s 33% smaller, in large part as a result of Sila’s battery, which has about 17% higher energy density, according to Berdichevsky. Not only does a denser, better battery lead to a smaller wearable, but Whoop was able to add additional features — like a sleep coach with haptic alerts, a pulse oximeter, a skin temperature sensor and a health monitor — without compromising its five-day battery life.
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