Battery Breakthrough of the Day: Researchers at Northwestern University have found a way to increase both the capacity and charging speed of a lithium-ion battery by up to 10 times.
Their method uses a graphene anode punctured with millions of tiny “nanoholes,” which allows lithium ions to pass through instead of traveling around long, thin graphene sheets, the way they do in current batteries.
Between the graphene layers, engineers have added silicon, which can store many more lithium ions than graphene on its own.
“Even after 150 charges, which would be one year or more of operation, the battery is still five times more effective than lithium-ion batteries on the market today,” said Prof. Harold Kung, lead author of the battery study.
And that’s just the anode. Northwestern University says the researchers plan to move on to the cathode next, trying to squeeze even more efficiency out of Li-ion batteries.
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