Aluminum air battery working principle and characteristics

[China Aluminum Industry Network] The working principle of aluminum air battery: The chemical reaction of aluminum air battery is similar to zinc air battery. Aluminum air battery uses high purity aluminum Al (including aluminum 99.99%) as positive electrode, oxygen as negative electrode, and potassium hydroxide (KOH) and sodium hydroxide (NaOH) as electrolytes. . Aluminum takes in heavy oxygen from the air and generates a chemical reaction when the battery is discharged, and aluminum and oxygen are converted into alumina. The progress of aluminum air battery is very rapid, and its application on EV has achieved good results. It is an air battery with promising future. Aluminum air battery features: 1, the specific energy than the large aluminum air battery theoretical energy up to 8100Wh/kg, the actual specific energy of the current aluminum air battery only reached 350Wh/kg, but also 7 to 8 times the lead-acid battery, nickel-metal hydride battery 5.8 times 2.3 times that of lithium batteries. After adopting the aluminum air battery, the vehicle can significantly increase the driving mileage. According to foreign data, the use of aluminum air batteries in California has had only one record of aluminum electrode driving mileage of 1,600 km. 2. Light weight The total energy of traction power lead-acid batteries developed and developed in China is 13.5kWh and the total mass is 375kg. The total mass of the same energy aluminum air battery is only 45kg, which is 12% of the lead-acid battery quality. As the battery quality is greatly reduced, the vehicle's service quality is also reduced, which can increase the vehicle's loading energy or extend the driving range. 3, aluminum is not toxic and dangerous aluminum will not cause harm to the human body, can be recycled and used, does not pollute the environment. Aluminum is rich in raw materials and has a large-scale aluminum smelter with lower production costs. Aluminum recycling is convenient, and recycling and regeneration costs are also low. Moreover, the replacement of aluminum electrodes can be used to solve the problem of slow charging of aluminum air batteries. Although aluminum-air batteries contain high specific energy, their specific power is lower, charging and discharging speeds are slower, voltage lags behind, and self-discharge rate is greater. Thermal management systems are needed to prevent overheating of aluminum-air batteries during operation.