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Novel oxygen-ion battery may offer longer lifespan, claims TU Wien – pv magazine International


Austrian scientists have developed a lab-scale, solid-state, oxygen ion battery based mostly on blended ionic digital conducting (MIEC), which is a particular sort of non-combustible electroceramic supplies. The battery has about 30% of the vitality density of lithium-ion batteries however can supposedly obtain an extended life.

Researchers from the Vienna College of Know-how (TU Wien) have developed an oxygen-ion battery that’s mentioned to rival lithium-ion batteries with a “very lengthy lifespan,” in keeping with a TU Wien assertion.

Scientists have proven that blended ionic digital conducting (MIEC) perovskite-type oxides, electroceramic supplies generally utilized in stable oxide gasoline and electrolysis cells, can be utilized to create a solid-state oxygen ion battery that operates at 350 C as much as 500 C.

“These oxygen ion batteries could provide some benefits over different battery applied sciences, equivalent to [lithium-ion], sodium sulfur, or ZEBRA batteries,” the lecturers mentioned. “Consisting solely of stable, non-flammable oxides, they current little or no safety threat in case of gadget failure. As well as, they are often made in bulk from many components, and particularly, don’t rely of important components equivalent to cobalt or lithium.

The workforce used a ceramic materials referred to as yttria-stabilized zirconia (YSZ) with MIEC skinny movie electrodes as mannequin cells. These ceramic supplies can soak up and launch double adverse oxygen ions. When an electrical voltage is utilized, the oxygen ions transfer from one ceramic materials to a different, after which they’ll migrate again once more, thus producing an electrical present.

“That is similar to lithium-ion battery electrodes, which retailer electrical vitality by altering the lithium content material. Basically, voltage-driven adjustments in oxygen stoichiometry correspond to charging / chemical capability discharge, the place self-discharge by means of the change of atmospheric oxygen is prevented,” the researchers defined.

Crucially, they consider that exchanging oxygen with the environment within the different path can result in an extended battery life.

“The oxygen-ion battery could be regenerated with out issues: If oxygen is misplaced as a consequence of facet reactions, then the loss could be compensated by oxygen from the ambient air,” says TU Wien.

Lecturers create full-cell solid-state oxide batteries by combining two electrodes with totally different oxygen entry potentials and use them to foretell the efficiency of an optimized solid-state oxide ion battery.

The outcomes present volumetric vitality densities of as much as 140 mW h cm-3, which corresponds to virtually 30% of the volumetric vitality density of present lithium-ion batteries, in keeping with scientists. DC measurements of the cell present capacities as excessive as 120 mA h cm-3 in a cell voltage of 0.6 V at 350 C to 400 C. Each of the electrodes present biking efficiency with faraday efficiencies above 99%.

“When you want a big vitality storage unit to quickly retailer photo voltaic or wind vitality, for instance, the oxygen-ion battery could be a wonderful answer,” says researcher Alexander Schmid . “When you construct an entire constructing stuffed with vitality storage modules, the low vitality density and the elevated working temperature don’t play a major position. However the strengths of our battery are a lot vital there: the lengthy service life, the opportunity of making many supplies with out uncommon components, and the truth that there isn’t any threat of fireplace in these batteries.

The authors share their findings in “Rechargeable Oxide Ion Batteries Based mostly on Blended Conducting Oxide Electrodes,” not too long ago printed in Superior Vitality Supplies. They submitted a patent software for his or her invention.

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