Solid state batteries, the new great promise of the electric car to achieve the promised autonomy


The most pressing problem with electric vehicles remains the battery, either because they are not large enough, do not house the necessary energy or they degrade quickly. This variant promises to fix almost all of these bugs.

As much as electric cars are worth more every day, the time when they become the best-selling car in Spain is still far away, no matter how much their prices have been falling for five years.

The drawbacks surrounding the electric vehicle are varied, despite its constant improvement and improvement. And it is that the angular problem on which the doubts revolve is still there: the current batteries.

For this reason, it is in this field where researchers from all over the world are racking their brains, since whoever solves the problem will be able to revolutionize the electrical world. And in this sense, there is very interesting news.

Engineers from the University of California at San Diego have tried to test two approaches in one to see if they solve the problem. The first idea was to use solid-state electrolytes instead of liquids. And the second add silicon to the anode component to increase the energy density.

Well, it seems that the experiment has gone well because after creating a prototype with these characteristics they have verified that its battery is safe, durable, and has the potential to store large amounts of energy.

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The idea is to incorporate or completely replace the graphite used as an anode with silicon, to be able to store up to 10 times more lithium ions, it is an approach that has been with us for a decade.

The problem was that the silicon causes the liquid electrolyte to degrade quickly and the battery fails quickly. The revolution is coming now as San Diego engineers believe the solution may lie in using a solid-state electrolyte instead.

This new approach involves making some adjustments to the way the silicon anode is assembled: The scientists eliminated the carbon and binders that are normally used and opted for a cheaper form of micro silicon that undergoes less processing.

A solid sulfide-based electrolyte was then introduced to carry the charge, and the resulting battery was extremely stable, avoiding harmful interactions at the anode.

The new silicone solid-state battery is safe, durable, and energy-dense, they say. And, in addition, a complete laboratory-scale battery was shown to be capable of 500 charge and discharge cycles while retaining 80% of its capacity.

It is possible that we are in the first steps of a new storage technology that finally eliminates the current big problems of batteries.

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