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Current issue

ELEKTRO 7/2017 was released on June 26th 2017. Its digital version will be available on July 28th 2017.

Topic: Cables, conductors and cable technique; Connectors; Software; Marking and labelling

Main Article
Electrical insulation and thermal conductivity

SVĚTLO (Light) 3/2017 was released on June 9th 2017. Its digital version will be available on July 10th 2017.

Lightning sources
Terminology of LED lighting sources 

Daylight
The day lighting of big living rooms
Light technology assessment of linear structure

Rechargeable batteries that last longer and re-charge more rapidly

11.07.2016 | Paul Scherrer Institute | www.psi.ch

Materials researchers at the Swiss Paul Scherrer Institute PSI in Villigen and the ETH Zurich have developed a very simple and cost-effective procedure for significantly enhancing the performance of conventional Li-ion rechargeable batteries.

Instead of inventing a new battery technology, researchers took a different approach: They checked existing components with a view to fully exploiting their potential. Simply by optimizing the graphite anode – or negative electrode - on a conventional Li-ion battery, researchers were able to boost battery performance. Under laboratory conditions, they were able to enhance storage capacity by a factor of up to 3. Owing to their complex construction, commercial batteries will not be able to fully replicate these results. But performance will definitely be enhanced, perhaps by as much as 30 – 50 percent: further experiments should yield more accurate prognoses.

New type of rechargeable battery

The method involves coating the graphite flakes with nanoparticles of iron oxide sensitive to a magnetic field and suspending them in ethanol. The suspended and already magnetized flakes are subsequently subjected to a magnetic field of 100 millitesla—about the strength of a fridge magnet.. As a result, they are perfectly ordered, reducing the diffusion distances covered by the lithium ions to a minimum.

Read more at Paul Scherrer Institute

Image Credit: Paul Scherrer Institute

-jk-