With a new type of anode, the electric car charges up to 400 km in 5 minutes

With a new type of anode, the electric car charges up to 400 km in 5 minutes

March 31, 2020 0 By autotimesnews

Enevate’s development protects the anode of the lithium-ion battery with a special silicon film and increases the speed of the ions. A simple solution allows you to charge an electric vehicle’s battery for 400 km in 5 minutes and increases the average range of electric cars by 30%. A revolutionary solution can quickly hit the market – technologically, there is nothing complicated in the production of new anodes.

Battery manufacturers have been trying for years to replace graphite anodes in lithium-ion batteries with silicon ones, which would significantly increase the range of electric vehicles. Some developments, mainly for electronics, may soon appear on the market. Typically, they contain silicon oxide or a mixture of silicon and carbon.

However, the American company Enevate uses a porous film of almost pure silicon. Not only is this an inexpensive solution, it can increase the average power reserve of modern electric vehicles by 30%. And in order to charge such a battery over 400 km, it will be enough only five minutes, reports Spectrum.

When lithium-ion batteries are charged, lithium ions move from the cathode to the anode. The more ions the anode holds, the higher the energy intensity and the longer the battery lasts. In theory, silicon can hold ten times more energy than graphite. But it greatly expands and contracts in the process, so it lasts for several charge / discharge cycles.

In order to increase the life of the anodes, some battery manufacturers use a plastic binder as a coating. Enevate went the other way: the company patented its own process of creating a porous silicon film with a thickness of 10 to 60 nm, which is applied directly to copper foil. The protective layer prevents silicon from reacting with the electrolyte.

The production process does not require high-quality silicon, so anodes of this type will cost less than graphite of the same capacity. And since they are mostly silicon, lithium ions can move very fast, charging the battery by 75% in five minutes.

However, the American company Enevate uses a porous film of almost pure silicon. Not only is this an inexpensive solution, it can increase the average power reserve of modern electric vehicles by 30%. And in order to charge such a battery over 400 km, it will be enough only five minutes, reports Spectrum.

When lithium-ion batteries are charged, lithium ions move from the cathode to the anode. The more ions the anode holds, the higher the energy intensity and the longer the battery lasts. In theory, silicon can hold ten times more energy than graphite. But it greatly expands and contracts in the process, so it lasts for several charge / discharge cycles.

In order to increase the life of the anodes, some battery manufacturers use a plastic binder as a coating. Enevate went the other way: the company patented its own process of creating a porous silicon film with a thickness of 10 to 60 nm, which is applied directly to copper foil. The protective layer prevents silicon from reacting with the electrolyte.

The production process does not require high-quality silicon, so anodes of this type will cost less than graphite of the same capacity. And since they are mostly silicon, lithium ions can move very fast, charging the battery by 75% in five minutes.