Tesla could incorporate liquid electrolyte batteries better than the current one
Currently, the current batteries are composed of an anode (which is usually graphite) and a cathode, which is a lithium alloy with other metals. Among them, there is a separator, in addition to an electrolyte. When the battery is charging and discharging, it forms lithium oxide at the anode, so you lose lithium able to store the charge. he electrolyte, which is liquid, is a conductive material that helps reduce the harmful effects of dendrite formation in batteries, but reduces their density and makes them flammable.
However, Tesla continues to advance his batteries. The company has already managed to reduce the presence of cobalt in its batteries and its goal is to eliminate it completely. The composition of 2170 batteries that Tesla used last year used a 80% nickel, 10% manganese and 10% cobalt. Later, in the summer, Elon Musk said that they had continued to use only one 3% cobaltand the one at The new generation would do without this rare and expensive material.
Tesla is among its collaborators Jeff Dahn, one of the pioneers in batteries. We owe him, for example, to increase the life of our mobile batteries, and he is currently working on improving the batteries for Tesla. In fact, he said in an interview that he had created better batteries than batteries in the solid state in which companies such as Samsung or LG Chem are currently working and promise to revolutionize electric cars.
The research that they published in Nature Energy, Jeff Dahn and other researchers have managed to create a new lithium-metal battery design no anode thanks to a LiDFOB / LiBF4 double salt liquid electrolyte. The design of these cells is bag-shaped rather than cylindrical like those currently used by Tesla.
The price of batteries keeps going down
It is currently believed that cells with lithium metal anodes are an alternative to current lithium ions, in which the liquid electrolyte must be replaced by an electrolyte in the solid state in order to maintain flat morphologies and without dendrite . However, Dahn states that the elimination of the anode and the use of this LiDFOB / LiBF4 combination allow to achieve a storage capacity of 80% after 90 cycles of full loading and unloading , the longest life demonstrated to date for cells with excess. lithium zero
This means that this liquid electrolyte is totally free of dendrite training, allowing in return Increase the density of the battery and the service life without having to resort to the solid electrolyte, which currently generates dendrites and is not compatible with the current battery manufacturing infrastructure, unlike those created by the team of researchers, which would reduce its price.
The cost of batteries does not stop falling, and Dahn himself recently said in an interview that he expects the cost of batteries to drop below $ 100 per kWh in the coming years, where they currently cost about $ 145 per kWh. Reducing the $ 100 will be a key point, as the manufacture of an electric car will cost less than an explosion.