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To do that, the researchers coated a lithium anode with a layer of hollow carbon nanospheres, to prevent the growth of the dendrites.
via Batteries take the lithium for charge boost • The Register.
As research is being done on incremental improvements in Lithium Ion batteries, some occasional discoveries are being made. In this instance, the anode is being switched to pure lithium with a coating to protect the very reactive metal surface. The problem with using pure lithium is the growth of micro crystalline “dendrites”, kind of like stalagmites/stalactites in caves, along the whole surface. As the the dendrites build up, the anode loses it’s efficiency and that battery slowly loses it’s ability to charge all the way. This research has shown how to coat a pure lithium anode with a later of carbon nanotubes to help act as a permeable layer between the the electrolytic liquid in the battery and the pure lithium anode.
In past articles on Carpetbomberz.com we’ve seen announcements of other possible battery technologies like Zinc-Air, Lithium-Air and possible use of carbon nanotubes as a anode material. This announcement is promising in that it’s added costs might be somewhat smaller versus a wholesale change in battery chemistry. Similarly the article points out how much lighter elemental Lithium is versus the current anode materials (Carbon and Silicon). If the process of coating the anode is sufficiently inexpensive and can be done on a industrial production line, you will see this get adopted. But with most experiments like these, scaling up and lowering costs is the hardest thing to do. Hopefully this is one that will make it into shipping products and see the light of day.