Water-soluble lithium-yttrium power storage battery

Could water based electrolytes make lithium ion batteries safer?

Combining this high-capacity cathode with a pure graphite anode and a water-based electrolyte, researchers have made a safe, high-energy and inexpensive lithium-ion battery. Lithium-ion batteries that use water-based electrolytes instead of flammable solvents would make rechargeable devices safer.

Are water-based lithium batteries a problem?

Researchers have been working on water-based lithium batteries for over two decades. One drawback of aqueous electrolytes is that they only work at low voltages, about 1.2 V, so they can’t supply enough power for consumer electronics such as cell phones, which need 4 V.

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How much energy does a lithium ion battery have?

The researchers combined the cathode with a pure graphite anode to make a full lithium-ion battery cell, which has an energy density of 460 Wh/kg, matching that of some of the best commercial batteries.

Are lithium ion batteries aqueous?

Most lithium-ion batteries, including aqueous ones made so far, use lithium–metal oxide cathodes and graphite anodes. Graphite holds much more charge than the lithium metal oxides because lithium ions intercalate, or slip easily, between graphite’s lightweight carbon layers.

Could a water-based battery be better than a commercial battery?

But the performance of water-based batteries has been subpar. Now, by designing a novel, high-capacity cathode, researchers have made an aqueous lithium-ion battery that boasts an energy density comparable to commercial devices—and is also less likely to explode (Nature, 2019. DOI: 10.1038/s41586-019-1175-6 ).