The current generation of zinc-ion cells use zinc metal as their anode, and liquid aqueous electrolytes. This combination is a cheaper, safer alternative to lithium-ion. However, until researchers developed a novel cathode for zinc-ion batteries, this chemistry’s lower storage density left it in the background. But this could change now …
New Cathode a ‘Critical Discovery’ for Zinc-Ion Chemistry
The researchers confirm how a lack of high-performance cathodes, has previously consigned zinc-ion batteries to the back-burner for sustainable energy storage.
But now they reveal a potential game-changer, in the form of a unique manganese dioxide–manganese vanadium oxide composite they synthesized.
The researchers report that this novel arrangement’s broader pore-size distribution, and enhanced structural stability, significantly improve aqueous zinc-ion electrochemical performance.
The team credits manganese vanadium oxide’s structural integrity, and manganese dioxide’s high theoretical storage capacity for this achievement. Thus, they believe, their novel cathode for zinc-ion batteries overcomes previous limitations.
What Does This Novel Combination Mean in Practice?
Bio Engineer believes this laboratory discovery is ‘poised to significantly enhance the performance of aqueous zinc-ion batteries’. Indeed, they go further by suggesting the innovation could even become an alternative to lithium-ion chemistry.
This could be true in theory, because zinc metal is more abundant, and therefore cheaper than lithium metal. Although zinc does burn at high temperatures, producing toxic fumes …
The electrochemical properties of the manganese-based oxide alternative to zinc-ion, are not a new discovery. However, this time their synthesized role in zinc-ion battery cathodes improves stability, cycling performance, and battery life significantly.
Taking these factors together, these modified zinc-ion batteries appear to show great promise for bulk renewable energy storage. Could this be the one that takes us beyond lithium battery chemistry? We watch, and wonder with interest.
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