TQ

“When what you are deeply passionate about, what you can be best in the world at and what drives your economic engine come together, not only does your work move toward greatness, but so does your life. For, in the end, it is impossible to have a great life unless it is a meaningful life. And it is very difficult to have a meaningful life without meaningful work. Perhaps, then, you might gain that rare tranquility that comes from knowing that you’ve had a hand in creating something of intrinsic excellence that makes a contribution. Indeed, you might even gain that deepest of all satisfactions: knowing that your short time here on this earth has been well spent, and that it mattered.”

Latest News

Facebook

Wednesday, November 4, 2015

New battery breakthrough could kill the petrol engine


SCIENTISTS at Cambridge University have released a paper detailing of a new generation of lithium-air battery that might finally fulfil the electric vehicle dream of being able to match petrol-powered machines in terms of performance, weight and range.
Call us cynical but it seems that we’ve been being told for at least 20 years that we’re on the verge of a battery technology breakthrough that will transform the technology and finally make it a viable rival to the internal combustion engine. Usually, these promises are the result of theories or lab tests with the inevitable proviso that the consumer versions of the technology will still be ‘a decade away.’
So it’s no surprise that the new Cambridge technology is… a decade away from the consumer market.
Cynicism put to one side, the actual technology of the latest research is interesting. Lithium-air batteries – which create voltage by reacting oxygen from the air with positively-charged lithium ions, forming lithium peroxide and generating electricity in the process – are proven to have impressive outputs. There’s talk that the new one might be 10 times more power-dense than current lithium-ion batteries. But lithium-air cells are notoriously hard to make work, and those that do have proved to be far too unstable for real-world use.
The new Cambridge research solves the stability problems by using a ‘fluffy’ carbon electrode made from graphene. Whatever that means.
But regardless of how it’s done, the result is a battery that has an energy density that’s similar to that of petrol; in other words, a battery the size and weight of your bike’s petrol tank would be able to give it the same performance and range. That’s a Holy Grail in terms of battery performance, and means that the usual provisos (short range, high weight and low performance compared to petrol vehicles) accompanying electric vehicles would no longer need apply.
Unfortunately, while the results are promising, the researchers developing the battery say that a practical version is still a decade away, not least because it only works at certain rates of charge and discharge and at the moment requires pure oxygen rather than simply air to operate.
'What we’ve achieved is a significant advance for this technology and suggests whole new areas for research – we haven’t solved all the problems inherent to this chemistry, but our results do show routes forward towards a practical device,' said Professor Clare Grey of Cambridge’s Department of Chemistry, the paper’s senior author.
Dr Tao Liu, also from the Department of Chemistry, and the paper’s first author, said: 'There’s still a lot of work to do, but what we’ve seen here suggests that there are ways to solve these problems – maybe we’ve just got to look at things a little differently.'
Source: Visordown
  • Blogger Comments
  • Facebook Comments

0 comments:

Post a Comment

Item Reviewed: New battery breakthrough could kill the petrol engine Description: Rating: 5 Reviewed By: Sheldon Dcruz
Scroll to Top