With all this said, lithium-containing batteries are yet to be dethroned. Innovation may be reaching its limits in this area, but it’s not there yet. The latest here is nanotubes. Researchers from Rice University recently reported the addition of a coating of nanotubes to the anode of a lithium metal battery prevents the so-called dendrites from forming and ultimately killing the battery. These dendrites, or metal whiskers, have been a major obstacle for the wider adoption of lithium metal batteries. With that solved, they might get a serious push, which will be good news: lithium metal batteries are more energy dense than their li-ion cousins.

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