New battery for electric cars charges 75% in 5 min

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One of the major challenges for the popularization of electric vehicles is the current stagnation in the evolution of battery efficiency – considering recharge time and energy capacity. Under these conditions, companies are trying to adapt new energy storage techniques, and Enevate, a California-based company, may have found a good alternative.

Graphite anodes have been part of the composition of lithium-ion batteries for years. Being considered the most efficient option to date, scientists and researchers seek to replace it with a material with greater capacity, prolonged service life and more efficiency.

The solution developed by Enevate consists of an extremely fine mesh made mostly of silicon – which has proven to be considerably superior in autonomy and recharge time. This porous film of compound substances results in a 30% increase in the autonomy of electric vehicles and significantly reducing the time required for recharging.

In short, the capacity of the batteries comes down to the amount of ions that the anode is capable of holding – the more the better. Taking advantage of this concept, silicon is an attractive option, since it is capable of holding 10 times more energy than graphite. However, electrical discharges in the material cause drastic expansions and contractions and can result in serious accidents – in addition to significantly reducing the durability of these batteries.

What Tesla and other vehicle manufacturers adopt is the addition of silicon to graphite powder, minimizing the chance of accidents and adding some of the efficiency of silicon to graphite batteries.

Enevate then revealed its porous silicon film that directly covers a copper sheet. Without requiring high quality silicon, the anodes covered by the mesh are cheaper than their graphite counterparts and have similar capacities. The Californian manufacturer’s meticulous design even allows for the recharging of 75% of the total capacity in just 5 minutes – without causing significant expansion.

In combination with efficiency, the production method for these silicon films is fast and is already capable of producing in huge quantities, according to Benjamin Park, CTO of Enevate. In addition, Park says the company is already working with several electric vehicle manufacturers and intend to introduce the product commercially by 2025.