Image Courtesy: LiveScience
Researchers in China say they have developed a new type of water-based battery that could dramatically outlast current battery technologies while also being safer for the environment. The experimental battery reportedly survives up to 120,000 charge cycles and uses non-toxic materials that researchers say can be disposed of with minimal environmental risk.
The design is based on an aqueous battery, a category of battery that uses water-based electrolytes instead of the flammable chemicals commonly found in lithium-ion systems. Scientists behind the project say the new approach could allow some grid-scale batteries to operate for hundreds of years under typical usage conditions. The findings were published in the journal Nature Communications as reported by Live Science.
To build the battery, researchers used specially designed covalent organic polymers, or COPs. These materials are made from tightly bonded organic molecules containing elements such as carbon and nitrogen. The polymers were engineered to remain stable in water-based environments, which has historically been a major problem for aqueous batteries.
Traditional aqueous batteries are generally considered safer and cheaper than lithium-ion batteries because they are nonflammable and use water-based electrolytes. However, they usually degrade relatively quickly due to corrosion and chemical instability inside the battery. In some cases, the electrolyte can also generate gases over time, reducing performance and creating safety risks.
The new battery attempts to solve those limitations through a carefully tuned chemical structure. Researchers identified a compound that combines strong ion-attracting properties with a stable honeycomb-like molecular arrangement. The system also uses a neutral electrolyte with a pH of 7, which reduces corrosion and chemical breakdown.
According to the researchers, the battery could last roughly 300 years in grid-storage applications based on current charging patterns. For comparison, conventional lithium-ion grid batteries typically survive only a fraction of that lifespan before significant degradation occurs.
The team also claims the electrolyte used in the battery is non-toxic enough to be comparable to tofu brine, making disposal much safer than conventional battery chemistries. Existing aqueous batteries often still contain toxic components that require careful handling at the end of their life cycle.
Aqueous batteries are mainly being explored for large-scale energy storage systems connected to electrical grids rather than consumer electronics or electric vehicles. Their lower energy density means they are generally too bulky for applications where compact size and lightweight design are critical.
Still, researchers see long-lasting, safer battery systems as increasingly important for renewable energy infrastructure. Grid storage plays a major role in balancing electricity generated from intermittent sources such as solar and wind power.
The new battery remains experimental, but the work reflects broader efforts to create energy storage systems that are not only more durable, but also easier to recycle and less environmentally hazardous over the long term.
