Researchers have succeeded in creating a prototype of a solid-state battery with a promising new electrode. Its alloy makes it possible to solve the problem of stability encountered by this type of technology and to increase its lifespan.
In mattermatter of battery technologies, it has been several years since batteries semiconductorssemiconductors are the subject of extensive research. Coming to replace the liquidliquid electrolyte by a materialmaterial solid, the benefits are multiplied. With them, the autonomy could double, the battery charge accelerate and the size of the cells decrease. A formula that would be perfect if this technology did not encounter major stability concerns that strongly impact its longevity. The instability comes from movementmovement ions lithiumlithium during charging. They expand then reduce in size and this quickly alters the chemistrychemistry.
To address this issue, researchers at theuniversity of new south wales (UNSW Sydney) in Australia, led by Professor Naoaki Yabuuchi of Yokohama National University, Japan, worked on a new electrodeelectrode. Its material is composed of lithium titanate and carbon dioxide. vanadiumvanadium, as well as lithium. The whole is ground and mixed in the form of particles of nanometric size.
Increase battery life and life
L’alloyalloy preserves the properties of ionsions lithium through charge and discharge cycles. With this process, the lithium ions no longer expand because the vanadium ions come to fill the spaces left vacant. During testing, the prototype battery had a capacity of 300 mAh/g. This was maintained even after 400 charge and discharge cycles. That is, the battery did not decline, as is usually the case with solid-state models.
This prototype is being watched closely by the electric car industry. This technology could give them greater autonomy and extend the durationduration of cell life. Finally, the last asset is that, according to the researchers, a full charge of an electric vehicle could be achieved in five minutes.