The other electrode, called a cathode, contains copper, nitrogen, carbon, and iron. “Typically, in lithium-ion and sodium-ion batteries, the anode is more often carbon-based,” said Wanli Yang a staff scientist at Berkeley Lab’s Advanced Light Source, the source of X-rays that were used in the battery experiments.īut in this case, both of the battery’s electrodes utilize the same type of materials based on elements known as “transition metals” that are useful in chemistry because they can exhibit various charged states. The anode featured in this latest study is made up of a blend of elements – including manganese, carbon and nitrogen – that is chemically similar to the formula of the iron-containing paint pigment known as Prussian blue. Compared with the relatively mature designs of anodes used in lithium-ion batteries, anodes for sodium-ion batteries remain an active focus of R&D. The battery that Natron Energy supplied for the study features an unconventional design for an anode, which is one of its two electrodes. Scientists at Berkeley Lab and New York University participated in the study, which was led by researchers at Natron Energy, formerly Alveo Energy, a Santa Clara, California-based battery technology company. The study results were published February 28 in the journal Nature Communications. Department of Energy’s Lawrence Berkeley National Laboratory were key in the discovery. This direct proof of a previously unconfirmed charge state in a manganese-containing battery component could inspire new avenues of exploration for battery innovations.
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