Phys: Li-ion rechargeable batteries that last longer, re-charge more rapidly
--Read more at: http://phys.org/news/2016-07-li-ion-rechargeable-batteries-longer-re-charge.html#jCpMaterials researchers at the Swiss Paul Scherrer Institute PSI in Villigen and the ETH Zurich have developed a very simple and cost-effective procedure for significantly enhancing the performance of conventional Li-ion rechargeable batteries. The procedure is scalable in size, so the use of rechargeable batteries will be optimized in all areas of application-whether in wristwatches, smartphones, laptops or cars. Battery storage capacity will be significantly extended, and charging times reduced. The researchers reported on their results in the latest issue of the research journal Nature Energy.
It's not necessary to re-invent the rechargeable battery in order to improve its performance. As Claire Villevieille, head of the battery materials research group at the Paul Scherrer Institute PSI says: "In the context of this competitive field, most researchers concentrate on the development of new materials." In cooperation with colleagues at the ETH in Zurich, Villevieille and co-researcher Juliette Billaud took a different approach: "We checked existing components with a view to fully exploiting their potential." Simply by optimizing the graphite anode - or negative electrode - on a conventional Li-ion battery, researchers were able to boost battery performance. "Under laboratory conditions, we were able to enhance storage capacity by a factor of up to 3. Owing to their complex construction, commercial batteries will not be able to fully replicate these results. But performance will definitely be enhanced, perhaps by as much as 30 - 50 percent: further experiments should yield more accurate prognoses."
Researchers point out that in terms of industrial implementation, improving existing components has the great advantage of requiring less developmental input than a new battery design using new materials. As Villevieille says: "We already have everything we need. If a manufacturer were willing to take on production, enhanced batteries could be ready for the market within one or two years." The procedure is simple, cost-effective and scalable for use on rechargeable batteries in all areas of application, from wristwatch to smartphone, from laptop to car. And it has the additional bonus of being transferable to other anode-cathode batteries such as those based on sodium.