At InsideEVs, we often use lithium-sulfur batteries, but have never seen such batteries. These batteries use solid lithium as the anode and liquid organic electrolyte, but what if the electrolyte is solid and lithium is liquid? This is proposed by researchers from Zhengzhou University, Tsinghua University, and Stanford University.
The researchers said that these batteries use sulfur or selenium to avoid the growth of lithium dendrites and have high coulomb efficiency and cycle stability. It's all thanks to how they work.
The operating temperature of the lithium battery is higher than the melting point, at 180.5oC (356.9oF. We bet about 200oC (392oF). Then, the liquid lithium is stored in a ceramic tube solid electrolyte made of LLZTO (Li6.4La3Zr1.4Ta0.6O12).
Due to the high temperatures involved, research has shown that these batteries can be used for enrichment and large-scale storage applications. A good example is the Hornsdale Power Reserve that Tesla built and plans to expand. If it is made of a lithium battery and has a higher energy density, it may not be necessary to expand it.
These batteries have a low manufacturing cost, long life, and high energy density. Unfortunately, it may never be used in a car, but it may be because you think it is not practical.
We must remember that the temperature of the engine is much higher than these. There is also a modified electric car powered by a sodium-nickel-chloride battery developed by the Swiss company KWO. It is at 270oC (518oF), but it is vacuum packed so that the temperature is only 5oC and 10oC higher than the ambient temperature.
A big problem with this solution is to keep the temperature of the battery so high. This will require the car to be parked on an external energy source only so that the battery does not damage and cool down. In other words, the problem will be maintaining its temperature, rather than making sure the driver is not burned. Well, this too, but this is a problem for all cars.
In short, it's unlikely to see this solution on any production vehicle, but it's interesting to see how new battery technology has evolved. EVANNEX recently reported that it is proceeding at a rate far beyond our imagination.