The lithium-ion battery is a common sight in today's gadgets, but researchers at Stanford University have shown off technology that can be used to make longer-lasting lithium-sulphur batteries.
With early tests showing that lithium-sulphur can potentially last four times longer than regular batteries, the Nanostructured Li2S/Silicon Rechargeable Battery with High Specific Energytechnology project was discussed in Nano Letters.
"The recent development of sulfur/mesoporous carbon nanocomposite cathodes represents a particularly exciting advance, but in full battery cells, sulfur-based cathodes have to be paired with metallic lithium anodes as the lithium source, which can result in serious safety issues," explains the report.
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Novel and metal free
"Here we report a novel lithium metal-free battery consisting of a Li2S/mesoporous carbon composite cathode and a silicon nanowire anode," it continues.
"This new battery yields a theoretical specific energy...which is four times that of the theoretical specific energy of existing lithium-ion batteries based on LiCoO2 cathodes and graphite anodes."
So, in a nutshell, the battery builds on research from a few years ago into an electrode made of silicon nanowires - which could hold ten times the charge of li-ion batteries - and has paired it with a clever lithium-sulphide cathode.
Upshot? Potentially gadgets that can last four times longer, and that's certainly exciting news.