“The very interesting part here is that both electrodes are based on the chemistry of transition metals in the same type of materials,” he added, with iron in the cathode and a special manganese chemistry in the anode. 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. Sodium (Na) atoms and manganese (Mn) atoms are labeled. The atomic structure of the anode material that achieved high performance in a sodium-ion battery. The study results were published on February 28 in the journal Nature Communications. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) 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. This chemical state, first proposed about 90 years ago, enables a high-performance, low-cost sodium-ion battery that could quickly and efficiently store and distribute energy produced by solar panels and wind turbines across the electrical grid. Scientists have discovered a novel chemical state of the element manganese. Another technique, known as sXAS (graph at left) does not reveal the same level of contrast. In the middle and right images, produced using an X-ray technique at Berkeley Lab, there is a clear contrast in an exploration of the manganese chemistry in a battery electrode material.
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