Lithium Sulfur Battery

[plasmanu]

A revolution is underway, it seems.
For a week google news has been talking about it.
I do not put a link, there are too many.
Surprising that -2w didn't do it, it often has good info.
3 times more powerful, much cheaper.
Australian researchers have solved the degradation problems of the cathode anode.
There are critics as usual, child labor in Africa for the tiny bit of cobalt needed

[lilian07]

If this technological breakthrough materializes in 2020, then it will be the end of thermal vehicles and probably a second boom in renewable energies.
Construction on an industrial scale must be confirmed with the announcements made:
simpler, less polluting by requiring water instead of solvents and less expensive.
Next comes a full-scale test in an EV.
We are talking about a ratio of 4 in mass energy gain.

[plasmanu]

To recondition everything that is electric with dead batteries, it's tempting.
Currently I am rebuilding a matra battery for my e-mo electric scooter which had prismatic cells with lithium-ion batteries. I found a great tutorial on the internet.
It keeps the bms, do not touch the maximum speed clamp and use the original charger. And increased autonomy.
Ordered on aliexpress, but still not received the 80 batteries

[jean.caissepas]

...
Currently I am rebuilding a matra battery for my e-mo electric scooter which had prismatic cells with lithium-ion batteries. ...

Hello,
I have the same battery problem on my e-mo +, but the BMS dropped (it only delivers 26v ). BMS nowhere to be found ...

Otherwise, I found a wrong link for these LI-S batteries:
https://www.futura-sciences.com/science ... urs-56762/

A+

[plasmanu]

"A lithium battery made by researchers at Monash University (Australia) achieves an unprecedented leap in energy storage efficiency. According to researchers' calculations, this could allow smartphones to last 5 days , and electric vehicles to exceed 1000 km of autonomy "
https://www.phonandroid.com/les-batteri ... hones.html

Link directly to Australian University
https://www.monash.edu/news/articles/su ... -batteries

ps: jean.caissepas I sent you a mp

[moinsdewatt]

Focus on NexTech's lithium-sulfur battery techno, which is targeting prototypes for cars by the end of 2021

ALINE NIPPERT Published on 16/02/2021

A potential successor to lithium-ion, lithium-sulfur battery technology is advancing. The American startup NexTech intends to produce prototypes for electric cars this year. Bill Burger, its CEO, and Fabio Albano, its technical director, explain to Industry & Technologies the specificities of their technology.

Will lithium-sulfur batteries power the electric vehicles of tomorrow? This is the goal of the American startup NexTech, founded in 2016 after fifteen years of development at the University of California, Berkeley. "We aim to produce prototypes of our modules for the automotive sector by the end of the year," says Fabio Albano, CTO of NexTech. We believe that our first batteries will be on the road around 2025-2027. "

Lithium-sulfur technology is a serious contender for lithium-ion succession, particularly in the on-board. With its sulfur cathode and metallic lithium anode, it is theoretically capable of storing 5 to 7 times more energy than a lithium-ion battery of the same mass. Or more than 1000 watt-hours per kilo. However, many difficulties remain before even approaching this value. And that it remains to achieve a sufficient service life for commercial applications.

Sulfur-graphene cathodes
For the time being, the various prototypes produced by NexTech, through their pilot line, have reached a specific energy of around 400 Wh / kg. "At this stage, our technology is therefore three times more efficient than lithium-ion," said Bill Burger, CEO of NexTech.

The first obstacle that the start-up had to overcome lies in the electrical non-conductive nature of sulfur. “Sulfur slows down the passage of electrons, which is a problem for a battery…” raises Mr. Albano. To overcome this problem, NexTech has patented a new type of cathode: "We have invented a new composite, which combines graphene - very conductive - with sulfur", enthuses the specialist, who specifies forming a "strategic alliance" with the company specializing in Directa Plus graphene to manufacture cathodes. Thanks to this innovation, the young shoot claims to be able to load their prototypes in just 15 minutes.

An electrolyte that reduces the formation of dendrites and the dissolution of polysulfides
NexTech also worked on two other major pitfalls of lithium-sulfur: the formation of lithium growths called dendrites on the lithium metal anode - risk of short-circuiting - and the dissolution in the electrolyte of certain polysulphides. created during the electrochemical reaction - which results in the loss of active sulfur in the cathode, and therefore of storage capacity.

The start-up claims to have patented processes that reduce these two phenomena which reduce the lifespan of batteries. “The formulation of the electrolyte is one of NexTech's most active areas of research,” explains Fabio Albano. Thanks to our electrolyte, we no longer see dendrites appearing and we obtain good results on the question of polysulfides. "

The two directors of NexTech are confident in their ability to meet the objectives of the automotive sector. “I don't think that's going to be a problem, in large part because the energy density of our battery, which is greater than that of lithium-ion, will increase the mileage of the vehicle,” says Albano. In sum, I think our battery life will be equivalent to the life of a car or truck. "

Target: 500 Wh / kg by the end of 2021
To venture into the automotive market, the next step for NexTech is to improve the energy density of their module. “We aim to reach 500 Wh / kg by the end of the year,” says Albano. “To do this, we have R&D projects on the interaction between sulfur and graphene, in order to make the cathode even more efficient,” continues Bill Burger.

Reducing the weight of the cells is the second lever on which NexTech wants to play to achieve the performance required in the automotive sector. “The aluminum foil and the electrolyte are 'dead weights', that is to say they do not generate energy, describes the CTO. We are therefore trying to minimize the weight of these components, ”he says, specifying that we are working, in part, with the French company Armor on this subject.

In addition to transportation, NexTech is in contact with the United States Department of Defense. "Military organizations from several countries are interested in working with us, for space or aeronautical applications for example," said Bill Burger.

https://www.industrie-techno.com/articl ... 2021.63894

[peter]

For recycling, PigPharma takes care of it...
https://www.vidal.fr/medicaments/gammes ... 92684.html

[GuyGadeboisTheBack]

Why bother with batteries????

[sicetaitsimple]

Why bother with batteries????

Did you check it?

[GuyGadeboisTheBack]

Yes, we can clearly see that it was done without any trickery...