Designer Henrik Fisker, who is going to compete with Tesla, patented a special solid-state battery that will provide a power reserve of 800 km, and will be charged in a minute. More than a year ago, the designer of the BMW Z8, Aston Martin V8 Vantage and the Aston Martin DB9 has announced plans to release an expensive electric sports car - electric EMotion with a power reserve of in excess of 600 km and a maximum speed of 260 km/h. But since then, nothing but teasers and models, the audience saw. According to the latest data, the first car of the brand was to be presented in January 2018.

The company claimed to have found something unique that was supposed to provide power and power reserve. A year ago, Fisker said that the car will not be conventional lithium-ion batteries, and special energy elements with a high content of graphene. Now the company has filed a patent on its batteries. According to him, in Fisker Inc. we created something efficient and solid. If earlier it was announced about the range of 640 km, now it is increased to 800 km. But the most striking parameter is the charging speed of this battery is 1 minute. If the parameters are the same in practice, the patent can become really revolutionary, and the company will have an important argument in the competition with Tesla.

Fisker is an objectively very small company, and now its ambitions seem unrealizable. But the story with the batteries may well be true. The fact is that the company is working on them co-founder of the startup Sakti3, which is for the development of solid-state batteries in 2015, the company bought Dyson, paying $90 million If it does not work with the release of sports cars, Fisker will be able to sell batteries to third parties.Solid-state batteries are a promising direction for the automotive industry. It is expected that they will be able to solve the main problems of electric cars — long charging and low power reserve. The density of Fisker solid-state batteries will be 2.5 times higher than traditional lithium-ion ones.

The article looks more like a statement and it is logical to talk about two things: the first – the machine and its mileage, the second – the technology of solid-state batteries. It is possible to accelerate Tesla to 800 km, adding only an additional battery. It is necessary to understand that the figure itself does not mean anything, because it is unclear the engine power, the mass of the machine and the number of people who can be placed in it.

What you really need to pay attention to is the fact that the guys want to make batteries with increased energy consumption based on solid-state technology. The technology is not new, it is spoken about aloud for more than 10 years, and patents appeared already 2-3 years ago, and serious players in the market.

Solid-state technology in itself implies the rejection of liquid electrolyte, which is now used in batteries. This electrolyte is one of the critical components of the battery, because it is fire-hazardous. Solid-state batteries don't have this property and don't burn.

The guys say that they want to use graphene as an anode. Graphene has good properties and can take lithium quickly, which allows it to be charged quickly. In fact, this is not the best anode material for solid-state batteries. One of their key features is the use of inorganic ion electrolyte based on a certain composition of crystals. It is a material with very high lithium ion conductivity. Most often, as the cathode, they want to use pure lithium or pure sodium. The use of the cathode in the form of pure lithium can increase the energy intensity of the cathode from 160-180 mA*h/kg to 4200 mA*h/kg – actually at 30 (!) times.

On the other hand, taking into account the fact that these components have a very high ionic conductivity, it is possible to use other anodes, in particular sulfur. John Goodenough spoke about it in his work in February last year (John Goodenough - American scientist, expert in physics and materials science, winner of many prestigious awards. Proposed lithium cobalt (LixCoO2) as the cathode in the lithium-ion battery). It turns out that from the point of view of the technological approach stated in this article, the developers are closer to commercialization. That's why they talk about the transition from 600 to 800 kilometers - 30% increase in capacity.

More impressive is the charge for 1 minute. Take Tesla, whose battery consumption is about 100 kV/h, comparable with the statement that the car will drive 30% more - 200 km. Even with a 130 kilowatt-hour capacity charging installation with a maximum available voltage is 380 V, the current will reach 340 amps. This means that the cross-section of the wires will be thick with a thumb - the cross-section will be about 3 cm2. The developers claim that such a battery they can charge in a minute, which means 60 times faster than a Tesla battery. It turns out that the current should go in the amount of 20 000 A at 380 V – a very, very controversial issue. At 20,000 A the power of the charger itself should be 7.8 mW, which is possible only when powered from the power plant!

At the moment, a plausible 'charge rate' of the battery for 1 minute with such energy intensity is possible only with the replacement of the battery.



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