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You are here: Home / Sodium-ion Batteries Could Get Better Thanks to Graphene and Lasers

Sodium-ion Batteries Could Get Better Thanks to Graphene and Lasers

August 1, 2018 by extremetech Leave a Comment

This site may earn affiliate commissions from the links on this page. Terms of use. You hear a lot about the shortcomings of lithium-ion batteries, mostly related to the slow rate of capacity improvements. However, they’re also pretty expensive because of the required lithium for cathodes. Sodium-ion batteries have shown some promise as a vastly cheaper alternative, but the performance hasn’t been comparable. With the aid of lasers and graphene, researchers may have developed a new type of sodium-ion battery that works better and could reduce the cost of battery technology by an order of magnitude. The research comes from King Abdullah University of Science and Technology (KAUST) in Saudi Arabia. Much of the country’s water comes from desalination, so there’s a lot of excess sodium left over. Worldwide, sodium is about 30 times cheaper than lithium, so it would be nice if we could use that as a battery cathode. The issue is that standard graphite anodes don’t hold onto sodium ions as well as they do lithium. The KAUST team looked at a way to create a material called hard carbon to boost sodium-ion effectiveness. Producing hard carbon usually requires a complex multi-step process that involves heating samples to more than 1,800 degrees Fahrenheit (1,000 Celsius). That effectively eliminates the cost advantage of using sodium in batteries. The KAUST team managed to create something like hard carbon with relative ease using graphene and lasers. It all starts with a piece of copper foil. The team applied a polymer… [Read full story]




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