NEWS
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Nano charges to rescue lithium
Improving lithium ion energy storage systems is the thrust of research
projects in Europe and in the US, and nanotechnology is the great white
hope of both. Certainly, breakthroughs are needed in this area if
lithium batteries are to have a future.
The EU-funded Allstore initiative is exploring the use of nano-powders
and nano-composite electrodes and electrolytes. Targeted at
rechargeable lithium systems for a range of applications from laptops
to cars, the project aims to tackle the challenges of increasing
capacity and lifespan, and overcoming technical problems such as
thermal runaway.
In the US, GM researchers have announced some success in expanding the
energy storage capacity of lithium ion batteries destined for use in
the extended range electric car. Silicon nanowires have been used
to replace carbon on the anode to deliver a tenfold increase in storage
capacity, with the potential of a thousandfold increase. The silicon
nanowires have been found to expand and contract during charging and
discharging cycles without cracking.
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