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Current issue

ELEKTRO 12/2016 was released on December 7th 2016. Its digital version will be available on January 6th 2017.

 

Topic: Measurement, measuring devices and measurement engineering; Testing and diagnostics

 

Main Article

Lithium traction batteries for electric mobility (final part 2)

SVĚTLO (Light) 6/2016 was released on December 5th 2016. Its digital version will be available on January 5th 2017.

Interiors lighting
Colloquium Interiors 2016 – the fifth anniversary
Cooperation of indoor interior and lighting 

Standards, regulations and recommendations
New standards for road lighting

New design points a path to the ‘ultimate’ battery

16.12.2015 | University of Cambridge | www.cam.ac.uk

Researchers have successfully demonstrated how several of the problems impeding the practical development of the so-called “ultimate” battery could be overcome.

Scientists have developed a working laboratory demonstrator of a lithium-oxygen battery which has very high energy density, is more than 90% efficient, and, to date, can be recharged more than 2000 times, showing how several of the problems holding back the development of these devices could be solid.

New lithium-air battery

Lithium-oxygen, or lithium-air, batteries have been touted as the “ultimate” battery due to their theoretical energy density, which is ten times that of a lithium-ion battery. Such a high energy density would be comparable to that of gasoline – and would enable an electric car with a battery that is a fifth the cost and a fifth the weight of those currently on the market to drive from London to Edinburgh on a single charge. However, as is the case with other next-generation batteries, there are several practical challenges that need to be addressed before lithium-air batteries become a viable alternative to gasoline.

Now, researchers from the University of Cambridge have demonstrated how some of these obstacles may be overcome, and developed a lab-based demonstrator of a lithium-oxygen battery which has higher capacity, increased energy efficiency and improved stability over previous attempts.

Their demonstrator relies on a highly porous, “fluffy” carbon electrode made from graphene (comprising one-atom-thick sheets of carbon atoms), and additives that alter the chemical reactions at work in the battery, making it more stable and more efficient. While the results are promising, the researchers caution that a practical lithium-air battery still remains at least a decade away.

Read more at University of Cambridge

Image Credit: University of Cambridge

-jk-