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This looks like a huge breakthrough for EV battery production going forward! https://phys.org/news/2019-06-economical-energy-storage-electric-car.html

It took me a few times to read through (science wasn't my strongest subject) but here are some of the most interesting parts I noticed in the article.

Researchers at the Fraunhofer Institute for Material and Beam Technology IWS in Dresden have developed a new production process with the aim of efficient and environmentally friendly future battery production.

They coat the electrodes of the energy storage cells with a dry film instead of liquid chemicals. This simplified process saves energy and eliminates toxic solvents. A Finnish company is currently successfully testing the new IWS technology in practice.

Better and more cost-efficient production methods for energy storage are increasingly in demand, especially in Germany: All major automobile manufacturers have launched ambitious electric vehicle programs that will ensure a sharp rise in demand for batteries. So far, German companies have been purchasing the cells for this purpose in Asia. There are two main reasons driving this trend: Asian technology groups have many years of experience in the mass production of battery cells and a lot of energy is consumed in these processes. Production at locations with high electricity prices, such as Germany, is, therefore, very high-cost.
No more toxic solvents—lower electricity costs

It is exactly this fact the Saxon Fraunhofer engineers want to change: "Our dry transfer coating process aims to noticeably reduce the process costs in electrode coating," emphasizes IWS project manager Dr. Benjamin Schumm. "Manufacturers can eliminate toxic and expensive solvents and save energy costs during drying. In addition, our technology also facilitates the use of electrode materials that are difficult or even impossible to process wet-chemically."

But these materials are needed for future batteries with higher energy density. "For all these reasons, we think that our technology can help to achieve internationally competitive battery cell production in Germany and Europe."
On the way to the solid state fireproof battery

"In this way, we are also able to process materials for new battery generations where classical processes fail," says Benjamin Schumm. These include, for example, energy storage systems that use sulfur as active material or solid-state batteries which employ ion-conducting solids instead of flammable liquid electrolytes. "These batteries will be able to store more energy in the same volume than today's lithium-ion batteries," says the IWS scientist with a view to the future. "However, these solid electrolytes can lose their functional properties in contact with solvents.

A solvent-free coating process is significantly better qualified to produce these storage media." On the way of processing electrodes for all solid state batteries the researchers have reached one important milestone by applying their dry film technology using extremely low binder contents. They have recently published their results in ScienceDirect.
 

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I was hoping that supercapacitors became a thing but it seems that is dead but I still think there some need even with all this battery development.
 
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