The grenade design will improve Li-Ion batteries. Free Technical Library News

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Grenade design will improve Li-Ion batteries

24.02.2014

Researchers at Stanford University and the US Department of Energy's SLAC National Linear Accelerator Laboratory have announced a new development that could solve some of the traditional problems of lithium-ion batteries. They proposed a garnet-shaped electrode design (silicon nanoparticles resembling seeds packed in a hard carbon shell). This approach overcomes some of the barriers to the use of silicon in next-generation lithium-ion batteries.

Although not all problems have been solved yet, the proposed design allows us to bring the possibility of using silicon anodes in more compact, lighter and more powerful batteries for smartphones, tablets, electric vehicles. Experiments show that the garnet anode is capable of operating at 97% of its capacity even after 1 recharge cycles, making it an excellent solution for commercial applications.

According to the researchers, the silicon anode allows you to store 10 times more charge than the graphite anodes widely used in modern batteries. But it wears out pretty quickly due to numerous recharges. In addition, the reaction with the electrolyte leads to the formation of a film on the anode, which significantly worsens its properties. As the inventors explain, the proposed structure makes it possible to reduce the area of contact with the electrolyte, thereby preventing the formation of a film. Also, this approach made it possible to improve the characteristics of the electrode.

One of the problems on the way to the introduction of new technology on a mass scale remains the high cost of production. To solve it, it is necessary to simplify the production process and find a cheaper source of silicon nanoparticles.

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