The biggest concern about today’s batteries is their safety and cost. These batteries often overheat and catch fire, and they use expensive and environmentally harmful materials to manufacture them. To address this problem, scientists at Florida State University have developed a new type of zinc-ion battery that uses water-based technology and is considered safer.
According to a report in Interesting Engineering, the most significant feature of this new battery is that it retains its capacity even after being rapidly charged approximately 900 times. Batteries typically weaken after repeated charging, but this new technology appears capable of delivering stable performance over a long period of time.
Lithium-ion batteries are the most widely used batteries today, but they also carry the risk of overheating and fire, which is why efforts to find safer and more environmentally friendly alternatives have intensified worldwide.
Zinc-ion batteries were once considered a good option, but they faced a problem called “dendrites.” During charging, needle-like metal structures form inside the battery, eventually short-circuiting the battery and causing damage.
To address this challenge, scientists have developed a unique design in which the manganese dioxide electrode is formed within the battery itself. A water-based hydrogel is used, reinforced with Kevlar fibers, the same strong material used in bulletproof vests.
This battery is designed to act as a protective layer inside. It not only stabilizes the electrolyte but also prevents the growth of dangerous metal structures, reducing the risk of short circuits. Older zinc batteries are complex and expensive, requiring chemical pastes to be prepared, coated, and then dried. However, this new technology uses water to create the entire process, making the battery easier and cheaper to manufacture.
While this battery is currently unsuitable for lightweight devices like smartphones, zinc batteries are relatively heavy, this technology could prove extremely useful in applications where weight is less important, such as large energy storage systems or home backups.