One of the components that has undergone the greatest evolution within smartphones in recent years is the battery: it is not a visible part to the user, who therefore cannot notice it, but a battery of today has performance clearly superior to an accumulator even only five years ago.
Performance that translates into more loads in less space and, very importantly, one longer duration over time of the maximum charge that can be accumulated. Smartphones from a few years ago, for example, were unable to recharge to 100% after just a few months of use because the battery “was getting old“very quickly. Now things have improved, but much more can be done because research on lithium-ion batteries (i.e. those normally used in a smartphone) has undergone a strong acceleration thanks to the arrival of electric cars, which are equipped with huge batteries and which must last at least ten years. The latest research, the result of the work of a team of Japanese scientists, bodes well thanks to the use of new materials for the battery.
Lithium-ion batteries, the Japanese discovery
A team of scientists from the Japan Advanced Institute of Science and Technology (JAIST) found a way to keep lithium-ion batteries healthy and keep them at least 95% of their charge for at least 5 years. The secret is in the material used for the cathode, one of the two poles of the battery: the Bis-imino-acenafinio-parafenilene (BP).
Using this material, the scientists managed to keep the 95% of the original charge of the battery even after 1,700 complete charge and discharge cycles. Considering that the battery of a smartphone is recharged on average every day, but that it almost never arrives completely discharged in the evening, the result obtained by the scientists is equivalent to 5 years of average battery use.
Because it is important
The discovery of the JAIST scientists is important for the world ofConsumer electronics, but also for the industry electric cars. From a technical point of view, in fact, the difference between the battery of a smartphone and that of an electric vehicle is more quantitative than qualitative.
Having batteries that hold a charge for that long is key to maintain its value over time of an electric car (about a third of the cost of an EV today depends on the battery). For smartphones, tablets and other electronic devices, however, the discovery must be considered in view of the spread of ricarica wireless: in the future we will charge the battery more and more often by placing the device on different surfaces.
This will stress the battery much more than today, multiplying the charge and discharge cycles. A battery like the one developed by Japanese scientists, however, will withstand this stress much better.