A new lithium-sulfur battery has been created that is five times more efficient than a lithium-ion battery
Various scientific groups around the world tirelessly seek options for increasingly powerful and safer batteries. Lithium-sulfur batteries were considered promising, but they had a significant drawback, which, according to representatives of MONASH University, they managed to eliminate.
What was the problem with lithium-sulfur batteries
If we compare lithium-sulfur batteries, then their main advantage is a significant large capacity when compared with the most common lithium-ion batteries of similar dimensions.
And the new sulfur-based batteries allowed smartphones to last up to 5 days on a single charge under heavy use. But here's the main snag.
The whole point was that the sulfur cathode had a significant capacity. Because of this, problems arose with the control of the resulting voltage.
So the increased voltage destroyed the carbon matrix, which is responsible for transporting electrons into the insulating sulfur and the polymer binder (which held the two materials together).
And as a result of all this, the battery became completely unusable in a very short period of time.
Solution to the problem
A research team from Monash University has developed the following technology:
It was based on a traditional binding agent, which is responsible for the formation of super strong bonds between sulfur and the matrix and added special cavities to the design, which began to fill when the battery was on charging and as a result expanded.
So, with the introduction of these voids, laboratory samples of lithium-sulfur batteries showed excellent results. After 200 full discharge-charge cycles, their efficiency decreased by only 1%.
All the necessary patents have already been filed for this technology.
Of course, you can say that we are informed about another breakthrough in energy storage and storage almost once a week, but it is quite possible that sooner or later quantity will grow into quality and we will finally see a really effective analogue of the reigning lithium-ion ball batteries.
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