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Study Sodium-Ion Batteries On the Verge of A Breakthrough

Source: Fraunhofer FFB | Translated by AI 1 min Reading Time

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Sodium-ion batteries are considered an eco-friendly alternative to lithium-ion cells. They could soon be available on the mass market.

Sodium-ion batteries still require technical optimizations, particularly on the anode side, but the overall ecological balance is already very promising.(Image: © Jirawat Khankuen - stock.adobe.com)
Sodium-ion batteries still require technical optimizations, particularly on the anode side, but the overall ecological balance is already very promising.
(Image: © Jirawat Khankuen - stock.adobe.com)

A recent study by the Fraunhofer Research Facility for Battery Cell Production (FFB) and the University of Münster (Germany) has shown that sodium-ion batteries are on the verge of industrial mass production. According to a statement, they are considered a promising alternative to lithium-ion cells, particularly in applications where a slightly lower energy density is acceptable—such as in stationary storage systems.

For the first time, the researchers modeled different cell chemistries on the scale of gigafactories, comparing their energy density and CO₂ footprint. The result: cells with layered oxide cathodes already achieve energy densities comparable to established LFP batteries. On the anode side, hard carbon shows significant advantages in terms of climate impact, as it is much less energy-intensive and more cost-effective to produce compared to synthetic graphite. However, the energy density of these anodes still lags behind graphite—with an optimization potential of up to eleven percent, according to the researchers.

The authors see a crucial opportunity in this: Sodium-ion batteries could soon become a serious alternative, not only ecologically but also economically. Thanks to their drop-in capability, they can be produced on existing manufacturing lines for lithium-ion cells—a key accelerator for market entry.

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