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An overview of 9 significant advances in battery technology in 2020

Solid state, without dendrites

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In December, California-based company QuantomScape announced figures for some of its lithium-ion, solid-state batteries designed for use in electric cars, and the company was arguably successful. Can 80% of all-electric car batteries be charged in just 15 minutes a day?

QuantomScape promises exactly that, که mainly because it uses solid electrolyte instead of liquid electrolyte, and the positive pole of the battery is lithium metal, which acts as a current collector when the battery is connected to the charger. Solid jalt metal lithium battery also solves dendritic problem. In this way, a solid ceramic guard is placed between the positive pole and the negative pole.

The biggest promise of this innovative design is a very high density battery, about 4 times more than the lithium batteries in the Tesla Model 3. When it comes to weight, this battery will be able to deliver 380 to 500 watts per kilogram, which is far more than 260 watts per kilogram in the battery of Tesla packs. Not to mention that after 800 charge cycles, the battery has been able to maintain 80% of its capacity, which indicates safety and longevity.

In February, a team of researchers at the University of California took a creative approach to preventing dendrites from forming on lithium metal batteries. The team built a small ultrasound device and installed it inside a lithium metal battery. This device passes high-frequency sound waves through liquid electrolytes and prevents them from remaining static by circulating them.

This resulted in an even distribution of lithium on the positive pole, and we no longer saw the uneven distribution of lithium leading to the formation of dendrites. Equipped with an ultrasonic device in its tests, this battery was able to be charged from zero to 100 in just 10 minutes, and after 250 charge cycles, it remained stable.

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