The Tofu Brine Battery That Could End the Lithium Era

Researchers in Hong Kong and China have developed a new form of battery that is more eco-friendly and longer lasting than lithium ion batteries –  and it runs on tofu brine. The new water battery is still in research phases, but if the technology proves to be scalable enough to hit commercial markets, it could be a game-changer for the energy and tech sectors.

“Compared with current aqueous battery systems … our system delivers exceptional long-term cycling stability and environmental friendliness under neutral conditions,” the research team, composed of scientists from the City University of Hong Kong and Southern University of Science and Technology in Shenzhen, Guangdong, said in a paper published this month in Nature Communications.

The researchers found that their battery model can be recharged over 120,000 times. “At over a hundred thousand cycles, this could mean a single water-based battery could last at least a decade or so,” states a recent report on the breakthrough from Interesting Engineering. “For applications like grid storage (solar farms, wind balancing), that’s extremely valuable,” the article went on to say.

This kind of lifespan would represent a drastic improvement over the battery technologies that dominate today’s market. Lithium-ion batteries degrade after between 1,000 and 3,000 charge cycles. This could prove revolutionary, as finding an alternative to lithium-ion batteries to power rechargeable devices is a major priority for Big Tech and the global energy sector.

Moreover, these tofu-brine batteries could prove safer and more environmentally friendly than lithium-ion batteries. According to the study authors, the full cells are environmentally benign and nontoxic and can be directly discarded to environments according to various standards.” Water based (also called aqueous) batteries can also potentially be cheap to produce as they rely on ingredients that are less rare in addition to being less hazardous.

Lithium is environmentally harmful to extract, prone to fires, and its supply chains are geopolitically fraught. Currently, China alone controls half of the global lithium market, and is rapidly increasing its stake. In 2024, more than eight in ten battery cells on the planet were made in China. This means that finding a battery model that can compete with lithium-ion batteries in applications like grid-scale energy storage and electric vehicles would have revolutionary implications for global markets.

Researchers around the world have been racing to develop battery models that could diversify the market and make it more competitive and resilient. These models range widely in size, components, and application, with models currently under development for next-gen sodium-ion batteries, quantum batteries, nuclear batteries, and even sand and dirt batteries.

Of course, the irony is that the leading alternatives to lithium-ion batteries are also being developed in Chinese labs. If this new tofu-brine battery proves scalable and applicable outside of a laboratory environment, it could just be another step toward Beijing’s goal of near-total domination of clean energy technology value chains and status as the world’s first and premiere ‘electro-state.’

China’s extreme advantage in global battery making gives it a major point of leverage in global economies as the world continues to electrify at a rapid pace. It is estimated that European demand for lithium in batteries will reach kilo tonnes (thousands of tonnes) of Lithium Carbonate Equivalent by next year, and North American demand will reach 250 kit LCE. it’s all but certain that the vast majority of that demand will be supplied by China.

Other nations are aware of the risk of this dependency, and are taking pains to protect and promote domestic battery manufacturing, but these efforts may be too little, too late. “For globally competitive battery manufacturing industries to emerge outside of Asia over the next ten years, companies will need to do far more than ensure regulatory compliance,” summarizes a McKinsey & Company report released in January. “Challenges will need to be overcome on multiple fronts spanning supply chains, talent management, operations and technology.”

By: Haley Zaremba