themobility is the . There are those of smartphones, of the , wireless accessories and those of electric cars. All these batteries have one thing in common, they are difficult to and components, such as , are expensive. To address both ecological and cost concerns, researchers from the from the University of Maryland in the United States had the idea of using the shells of and in particular to create a battery.
Why shellfish? Because theshielding of and other crustaceans consists of . It is a biopolymer that is also found in the shell of some and even in the structure of . It is he who comes to strengthen their . This transformed substance is also already used under the name of for many commercial. It is used, for example, in the form of diet pills. In reality, it doesn’t really work, but these pills would still have the advantage of being able to reduce the bad . As for the batteries, it is by modifying the chitosan by immersing it in a of acetic that scientists have transformed it into a . It’s this particular gel, mixed with which can serve as a battery electrolyte.
Biodegradable in five months
During their experiments, the researchers were able to observe that with this type of mixed electrolyte, the battery had an energy efficiency that was maintained at 99.7%, even after 1,000 discharge recharge cycles, i.e. aof use of 400 cumulative hours for this prototype. So much for performance.
Regarding the ecological aspect, they also noticed that the battery couldalmost completely after five months. Only the zinc residues remained which could be recycled. The same type of experiment had already been tested with a pile made up of paper, as had already been reported .
In this case, the cell had completely biodegraded within a month. But these batteries animated by crustaceans also have other advantages. They do not overheat,not and present no risk of explosion. Finally, and on condition that they are not made from lobster shell, their production cost is much lower than that of . As Liangbing Hu, the director of the Mylance University research center explains in his chitosan can be obtained simply from of seafood neglected on our table.