Albufera Energy Storage has obtained the patent at the European level of an electrochemical rechargeable aluminum-air cell. This new battery significantly reduces the cost of current lithium-ion battery and has a much lower weight and volume per kWh stored compared to lead acid.
The patented battery is based on a new generation of electrolytes based on the ionic liquids technology and it also develops a new bivalent air cathode for loading and unloading based on grapheme-supported catalysts.
The innovations introduced in the cell by Albufera Energy Storage allow the battery reach 200 cycles of charge and discharge with greater efficiency than 75%. The current potential of the cell is 1.5V and 10Ah cells are being designed based on this same patent, the company says in a statement.
Within the metal-air batteries, the technology based on aluminum has always been considered as one of those that offer greater possibilities because it has one of the higher densities of energy, and the abundance of this metal, in fact the fourth most common element in the earth’s crust.
However, its use in energy storage has been limited mainly because of its difficulty of recharging. Research carried out by Albufera Energy Storage enables electrical recharging of these batteries and improves the performance of the air cathode.
The rechargeable battery is the second patent obtained by the company since in April 2015, Albufera Energy Storage obtained its first patent recognition for a primary cell, ie, non-rechargeable, also based on the aluminum-air technology. In addition, the company is already working on various projects for chain manufacturing of 1.5V primary aluminum-air batteries in 4 different button cell formats and one cylindrical battery R20.
Albufera Energy Storage considers that its new aluminum-air button cell has great potential in the market for hearing aids and has already some agreements, such as that with the consortium CHIARA, to enter this field. On the other hand, the cylindrical battery type R20 is primarily oriented to the traffic sensors market for Smart Cities, as it will have a specific energy above and a price below those of the current batteries in this sector.