New lithium-oxygen battery greatly improves energy efficiency, longevity

Lithium-air batteries are considered highly promising technologies for electric cars and portable electronic devices because of their potential for delivering a high energy output in proportion to their weight. But such batteries have some pretty serious drawbacks: They waste much of the injected energy as heat and degrade relatively quickly. They also require expensive extra components to pump oxygen gas in and out, in an open-cell configuration that is very different from conventional sealed batteries.
Read more: http://phys.org/news/2016-07-lithium-oxygen-battery-greatly-energy-efficiency.html?source=Snapzu