Small to mobile MP3, large electric vehicles, how to create a more secure, longer battery life, the number of charging cycles more rechargeable batteries has always been a key technical problem. We use lithium-ion battery technology for many years there are many obvious shortcomings, such as the rapid degradation of power, short life, not environmental protection, has repeatedly occurred overheating lithium battery, explosion is still lingering fear.
In a variety of technology is expected to replace lithium batteries, the recent emergence of a new force: zinc-air rechargeable batteries. In fact, zinc air battery technology has been invented more than 100 years of history, the use of activated carbon adsorption of oxygen in the air as the cathode active material, zinc as the anode to ammonium chloride or caustic solution as electrolyte. The 20th century, the sixties as a result of aerospace engineering technology improvements, zinc-air battery began to enter the practical application. Today, many hearing aids used in the button batteries, in fact, zinc air battery.
SINTEF established in Switzerland, ReVolt company is responsible for zinc-air rechargeable battery product development and marketing. The company said miniature zinc-air rechargeable batteries for hearing aids will begin selling next year, followed by zinc-air rechargeable batteries for other mobile devices such as mobile phones. To the market, its charge and discharge life should be up to 300 to 500 times.
In addition, by learning from the fuel cell structure, ReVolt said zinc-air rechargeable batteries will also be used in electric vehicles in the future, charging and discharging life of more than 10,000 times, but the technology is still far from practical distance.
Due to the structural limitations of zinc-air batteries, rechargeable battery technology has long been unable to achieve recycling. In recent years, the Norwegian research institutions SINTEF by improving the zinc electrode and internal humidity control, to achieve the zinc-air battery charging technology. The current rechargeable zinc-air battery in the experiment has been achieved more than 100 charge and discharge cycles, life expectancy can reach 200 times. Compared to lithium batteries, zinc-air rechargeable battery storage capacity is three times its cost is half of the lithium battery, and there is no security risk of overheating explosion.