You can eat the electrolyte in this battery.
Scientists from four Chinese universities have created a long-lasting, environmentally friendly battery using an electrolyte so safe it's comparable to the brine used to make tofu. Published in Nature Communications in February 2026, the research could represent one of the most significant shifts in battery technology in decades.
The water-based battery uses organic electrodes and a neutral aqueous electrolyte that is entirely non-toxic. Unlike conventional lithium-ion batteries — which contain flammable chemicals, require hazardous waste processing at end of life, and carry fire and explosion risks — this battery can be discarded without posing an ecological threat.
But its green credentials aren't even the most impressive part. In testing, the battery maintained exceptional performance through more than 120,000 recharge cycles with minimal degradation. For context, most lithium-ion batteries degrade significantly after 500 to 2,000 cycles. This battery survives 60 to 240 times longer.
'Compared with current aqueous battery systems, our system delivers exceptional long-term cycling stability and environmental friendliness under neutral conditions,' the research team said. 'Such performance highlights the research potential of this work and underscores its promise for practical application.'
The team is from City University of Hong Kong, Yanan University, the Southern University of Science and Technology, and Songshan Lake Materials Laboratory — a serious multi-institutional effort that signals this isn't a niche curiosity.
Water-based batteries have long been studied as a safer alternative to lithium-ion, but earlier versions struggled with cycling stability and energy density. This breakthrough addresses the stability problem in a dramatic way — 120,000 cycles represents a potential paradigm shift for how we think about battery longevity.
The applications are significant. Electric vehicles with batteries lasting many times longer than current models. Grid-scale energy storage that doesn't pose fire risks or create toxic waste. Consumer electronics that can be safely disposed of without hazardous waste concerns.
Chinese battery technology has been making headlines for years — from solid-state breakthroughs to fluoride electrolytes — but this tofu brine innovation carries an almost poetic quality. The solution to one of our century's great technological challenges may have been hiding in the humble liquid used to make bean curd for millennia.
Sometimes the most revolutionary ideas taste exactly like dinner. 🍋⚡
