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Tuesday, 3 May 2022

(TBS) QUANTUMSCAPE SOLID STATE


QuantumScape has announced impressive performance figures for what may be the first commercially viable lithium metal solid state battery. They claim that they can increase the autonomy of an electric car by up to 80%, and it that it can charge from 0 to 80% in just 15 minutes.

By using a solid electrolyte instead of the typical liquid solution, solid-state batteries can store considerably more energy by weight and volume than lithium-ion batteries; but yet, making a battery that is reliable and has a useful life appropriate to any driver's needs - high charge and discharge rates, long service life, and without any temperature or safety concerns - has proven difficult up to now.

QuantumScape says it has solved the problem with a new design that uses lithium-metal anodes that are not formed during manufacturing, but formed around the current collector when the battery is charged. The energy density is reportedly excellent. In volumetric terms, the new battery can store 1 kWh/l, about four times what the current Tesla Model 3 battery stores. By weight, it offers between 380-500 Wh/kg, as compared to 260 Wh/kg in packages currently used by Tesla.

The QuantumScape battery charges at blazing speeds, allowing a 0-80% charge in 15 minutes. It can retain more than 80% of its capacity after 800 cycles, which would represent about 240,000 miles (386,000 km) traveled in an electric car.

Dr. Stanley Whittingham, co-inventor of the lithium-ion battery and winner of the 2019 Nobel Prize in Chemistry, stated in that regard that "… the hardest part of making a working solid state battery is the need to simultaneously meet the requirements of high energy density, fast charging, long life cycle, and wide operating temperature range. 

These data show that QuantumScape cells meet all of these requirements, something that has never been achieved before. If QuantumScape can bring this technology to large-scale production, it has the potential to transform the industry." The brighter side - link - Nicolas Caballero - link - more like this (solid state) - link - more like this (electric cars) - link

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