Lithium-ion batteries have transformed everything from consumer electronics to electric vehicles and energy storage. But to power the next wave of tech — from planes to smartphones — they need to get denser. One option is to replace the graphite anodes within them with silicon ones. Silicon anodes can store 10 times the amount of lithium ions that graphite can and they take up a lot less space. That means more efficient batteries that last longer. Dutch startup LeydenJar has been touting the benefits for years. The company has bagged a healthy €100mn in funding to date — a vote…
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