We are looking for more operating time on the cell phone, but the development is going slowly for an important element in batteries, lithium, teases. But it is soon over.
Lithiums chemical properties make the element to the best possible material to batteries. Its greatest strength, however, is also its biggest drawback, for Avid after reacting with the surrounding area restricts the current lithium batteries which are used in all mobile phones today. But it is soon ending, for now, a team of Stanford researchers now know how to master the feisty element.
The Stanford team, can future batteries contain four times more energy per unit of volume. Mobiles will last longer and become smaller and lighter.
Lithium-potions are included as the anode, or one pole, in all modern mobile batteries. The antithesis, the cathode is a challenge for lithium heats and expands under load, and can not keep up with the cathode, it will create fissures in the battery cells.
These mikros prækker makes some lithium-ions escaping out of their cells. It forms the so called dendrites, impurities that shortens the battery life and capacity. So far, the problem is avoided by graft lithium with other materials in order to keep this in check during charging.
The Holy Grail in battery development is therefore to delay or prevent the development of dendrites in so batteries with lithium as anode may become clean.
Professor of materials science at Stanford University, and leader of the research team behind the breakthrough, Yi Cui, also describes it like this: “Among all imaginable materials is that it has the greatest potential of lithium as anode. It is incredibly light and has the highest energy density, but it’s problematic in need it’s rogue and many engineers and researchers have given up using thet ”
Cui’s team is, however, come to a breakthrough that brings pure lithium back as anode in batteries of the future. A nanobelægning of carbon must encapsulate each Lithium cell, and now makes it possible to package Lithium-anoderne much closer than in the past.
Not quite ready yet
The first prototypes are already up and hit 96% of Lithium theoretical potential-a quadrupling of current lithium batteries. The high capacity dratter, however, rapid down to less than 50% after 100 shipments.
Working already on next generation which must achieve 99% purity after 150 shipments. Traditional Lithium-polymer batteries are designed to keep power in the 500 to 2000 shipments.
The great technological achievement is not yet ready for mass production, but Yi Cui is optimistic and expects that the next generation of batteries can use the new technology.