Solid state of Li-S wie gaat het ooit halen? Of beide naargelang prijs-prestaties, dus toepassing naargelang voertuig?
Klik ZDnet.be94-jarige professor vindt niet-ontplofbare batterij uit
Samenvatting: De mede-uitvinder van de lithium-ionbatterij heeft een accu ontwikkeld
die drie keer zo veel energie bevat en niet kan ontploffen.
Tja, dat is dan de definitieve doorbraak voor alle wagens, zelfs vrachtwagens.
Of Li-S waar ze al een heel tijdje mee bezig zijn?
https://www.scientificamerican.com/article/researchers-solve-critical-flaw-in-lithium-sulfur-batteries/
Researchers Solve Critical Flaw in Lithium–Sulfur Batteries
Scientists have created a thin composite film that gives lithium–sulfur cells exceptional durability
By Umair Irfan, ClimateWire on March 21, 2017
Study: http://www.pnas.org/content/early/2017/03/14/1620809114
....
In a study published yesterday in the journal Proceedings of the National Academy of Sciences, Batista and his collaborators unveiled a thin composite film that gave lithium-sulfur batteries exceptional durability.
The researchers first simulated what kinds of materials and structures would work well to make lithium-sulfur cells last longer, computing how molecules in the cathode would interact with different materials.
The team then made the film from graphene, a one-atom-thick carbon structure, and an organic dendrimer, a polymer that has a tree-like branching structure. Results showed that the film had an average thickness of 90 nanometers.
The film kept the lithium-sulfur compounds together in one place, preventing them from leaching into the electrolyte and degrading the cell’s performance. With this mechanism, scientists showed that they were able to extend the cycle life of the lithium-sulfur cell without compromising its performance.
“The amazing thing is that with these materials, we were able to make batteries that have a record of stability with a minimum amount of membrane,” Batista said.
Co-author Jianbing Jiang, a postdoctoral researcher at the Energy Sciences Institute at Yale University, noted that the composite film was made from commercially available starting materials, which would make it cheap and easy to scale up.
“Theoretically, the preparation of this material is quite easy and straightforward,” he said.
The researchers noted that they are still in the preliminary stages of this work and are now working on ways to improve the performance of lithium-sulfur batteries even further. “From there, we can design new materials with even better performance,” said co-author Ke Yang, also a postdoctoral researcher at the Energy Sciences Institute.
