The competition to develop more competitive batteries is fierce. The latest research from Stanford University and the National Accelerator Laboratory (SLAC) has presented a major discovery that will allow increased energy density and lithium battery safety.
The works have focused their efforts on the redesign of the current collector. A component that currently has been tried to solve with a thinner or porous design, something that means reducing weight but at the cost of increasing the risk of fire, which has led many manufacturers to add more electrolytic material.
Lithium batteries have a pair of current collectors, one at the anode and one at the cathode, which works with the device's two electrodes to distribute current flow in either direction. Today's current collectors are typically made of copper foil or aluminium foil, making them one of the heaviest components in the battery, sometimes accounting for up to 50% of the total weight of the device.
According to Yi Cui, a professor at SLAC and Stanford, "The current collector has always been considered dead weight, and until now it hasn’t been successfully exploited to increase battery performance. But in our study, making the collector 80% lighter increased the energy density of lithium-ion batteries—how much energy they can store in a given weight—by 16-26%. That’s a big jump compared to the average 3% increase achieved in recent years.".
The Stanford University team have been experimenting with a lightweight polymer called polyimide. This was integrated with a fire retardant called triphenyl phosphate. One of the great advantages of this approach according to its developers is that the new collector should be easy to manufacture and also cheaper, by replacing some of the copper with an inexpensive polymer.
Some achievements that have already been patented and that have even been sent to different battery manufacturers to begin exploring the possibilities of this interesting advance that will help increase the energy densities of batteries, improve safety, and even reduce their costs. via nature.com.
In order to be able to sell the production version of the all-electric Renault 5 Prototype planned for 2023 at a profit, Renault is analyzing the LFP batteries. The price range of the Renault 5 should be between 20,000 and 30… Continue reading
The Volkswagen Group has announced that it will invest 1,000 million euros in its first battery cell production plant in Europe, which will probably be located at its headquarters in Salzgitter, Germany. Everything depends, according to the… Continue reading
Opel wants to build the largest German electric car battery factory in the town of Kaiserslautern, as announced by Michael Lohscheller. The "one billion euro" plant will be built in partnership with the French company Saft, a… Continue reading
Samsung researchers have presented the prototype of a solid-state battery cell, which should help electric cars reach a range of 800 kilometres and withstand over 1,000 charging cycles. There is also a solution to the problem of dendrite… Continue reading