Focus Innovations

09.09.2013
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New low-cost batteries: towards renewable resources

The MIT of Boston develops economical and safe stockpiles, thanks to the elimination of the membrane between bromine and hydrogen.
MIT (Massachussets Institute of Technology) researchers of Boston have developed new rechargeable low-cost batteries that could definitely solve the main problem of renewable sources: the discontinuity of the production. In fact, if it was possible to reduce significantly the stockpiles, the use of renewable resources would be more convenient even in hours and days they are normally not available.

The real innovation of these stockpile systems MIT presented consists in the possibility to accumulate energy without the expensive membranes that are present in normal batteries separating the two reagent inside. This new generation’s batteries are to be considered an important move towards the reduction of stockpiles’ costs and the use of renewable and alternative resources.

In detail, these new batteries contain two liquids inside, a bromine solution and a hydrogen one. To accumulate energy, these two are pumped through a channel between the two electrodes generating electro-chemical reactions. Then, the expensive membranes previously used have been abandoned exploiting the laminar flow, a phenomenon that permits to the two liquids to flow in parallel avoiding undesirable reactions. Consequently, their strong points are the low costs together with the big reliability.

The membranes, however, a part from being also particularly expensive, are also easily corrodible from the two solutions in the battery.

Considering the energy stockpile of the new generation low-cost batteries, according to the mathematical model developed by MIT researchers, the accumulated energy would be of 100 dollars per kilowatt-hour. According to the energy Department of the US experts, such a cost should be attractive for public services companies.


Source: ANSA