Researchers from the City University of Hong Kong and Southern University of Science and Technology have developed a new water-based, eco-friendly battery based on tofu brine.

“Compared with current aqueous battery systems … our system delivers exceptional long-term cycling stability and environmental friendliness under neutral conditions,” the team said in its paper.

The new battery uses what the team calls “organic” electrodes with neutral, non-toxic electrolytes. According to the team, the new tofu-brine-based battery is capable of 120,000+ charge cycles, and is basically saltwater-level safe.

 “Such performance highlights the research potential of this work and underscores its promise for practical application,” the team added.

This means it is neither acidic nor flammable. If scalable, this could prove revolutionary, especially in terms of replacing other battery tech like lithium-ion.

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