The Li-ion battery as we know it, is going to have a major overhaul, if reports are to be believed. In a research work done by Northwestern University, this most common place battery used in pretty much every laptop and smartphone could be made to charge much faster and last much longer.

There is a major change in the design of the Li-Ion battery, which currently uses carbon-based graphene sheets, which have a limited capacity to hold Li ions. During charging of the battery, these free ions need to oscillate to and fro between anodes, and due to the limitation in capacity of graphene to hold more than one Li ion, the charge process takes place at a much slower rate.

The solution – Silicon. Silicon has more capacity to hold four Li ions, which is four times the amount that graphene can hold. Here is an excerpt of the methodology of creating a “shortcut” to charge Li-ion batteries faster. (from Wired’s article).

Silicon is the answer after all — it can hold a whopping four lithium atoms for every silicon atom — but carefully sandwiching clusters of it between the graphene sheets avoids the disastrous fragmentation problem. And by poking tiny holes (10 to 20 nanometeres wide) in the graphene, the lithium ions have a “shortcut” to the anode.

For the research report, visit Professor Kung’s page on NorthWestern University’s website here.

(via WIRED )

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