Aluminum air battery may surpass lithium battery

Onlookers! Aluminum air batteries may surpass lithium batteries

Abstract: aluminum will not cause harm to human body, and can be recycled without polluting the environment. Aluminum is rich in raw materials and has large-scale aluminum smelters with low production costs

the latest news was obtained from Ningbo Institute of materials, Chinese Academy of Sciences. The research team of the Institute has developed a kW aluminum air battery power generation system based on graphene air cathode. They used graphene composite manganese oxide catalyst and a new graphene based high efficiency air cathode to increase the power density of the single battery by 25%, greatly improving the comprehensive performance of the metal air battery. The battery system has an energy density of 510wh/kg, a capacity of 20kwh and an output power of 1000W

the actual demonstration shows that the battery system can simultaneously supply power to a TV, a computer, an electric fan and 10 60 watt lighting bulbs, which preliminarily verifies the power generation and power supply capacity of the aluminum air battery system and is a major breakthrough in the field of new energy and new materials

aluminum air cell is essentially a fuel cell. It is a chemical power source that directly converts the chemical energy of metal materials into electrical energy

the aluminum air battery uses aluminum as the negative pole and oxygen as the positive pole in the single battery. It only consumes aluminum and a small amount of water during operation. When the aluminum and water are consumed, it cannot work. It is a primary battery and cannot be recharged. The aluminum electrode needs to be replaced before it can continue to work. Theoretically, the amount of positive active material of this kind of battery is infinite, so the theoretical capacity of the battery mainly depends on the amount of negative metal, and this kind of battery has a larger specific capacity. As a special fuel cell, aluminum air battery has great commercial potential in military, civil, underwater power system, backup power source of telecommunication system and portable power supply

advantages and disadvantages of aluminum air battery in China's plastic machinery market

① the specific energy is large, and the theoretical specific energy of aluminum air battery can reach 8100wh/kg

② light weight, the total mass of aluminum air battery with the same energy is only 12% of the mass of lead-acid battery

③ it is non-toxic and can be recycled

④ abundant aluminum raw materials

the disadvantages of aluminum air battery are also obvious:

① it is a chemical reaction device that releases electric energy. It cannot be recharged repeatedly. It needs to replace the aluminum electrode to continue working

② although the aluminum air battery contains high specific energy, its specific power is low

③ the charging and discharging speed is relatively slow, the voltage lags behind, and the degradation cycle of self discharging PCL is 2 ~ 3a, with a high rate

④ thermal management system shall be adopted to prevent overheating of aluminum air battery during operation

the theoretical specific energy of aluminum air battery can reach 8100wh/kg. In 2014, the actual specific energy of aluminum air battery only reached 350wh/kg, but it is also 7-8 times that of lead-acid battery, 5.8 times that of nickel hydrogen battery and 2.3 times that of lithium battery. After the aluminum air battery is adopted, the vehicle can significantly increase the driving range. According to relevant foreign materials, California, the United States, has a record that the driving range of the aluminum electrode is 1600km only once in the electric vehicle using the aluminum air battery

the traction power lead-acid battery developed and developed in China has a total energy of 13.5kwh and a total mass of 375kg. The total mass of aluminum air battery with the same energy is only 45kg, which is 12% of the mass of lead-acid battery. As the mass of the battery is greatly reduced, the curb weight of the vehicle is also reduced, which can improve the loading energy of the vehicle or extend the driving range

aluminum will not cause harm to human body and can be recycled without polluting the environment. Aluminum is rich in raw materials and has large-scale aluminum smelters with low production costs. Aluminum recycling is convenient and the recycling cost is low. Moreover, the method of replacing the aluminum electrode can be adopted to solve the problem of slow charging of aluminum air battery

although the aluminum air battery contains high specific energy, its specific power is low, its charging and discharging speed is slow, its voltage lags behind, and its self discharge rate is large. It is necessary to adopt a thermal management system to prevent the aluminum air battery from overheating during operation

Alcoa Canada and phinergy, an Israeli company, newly displayed 100 kg aluminum air battery, which can store enough power to drive 3000 km. Cars using this kind of battery still need to keep the lithium electronic battery. The aluminum battery only starts after the lithium battery is discharged. Therefore, it can be used for a long time. During this period, it only needs to fill with water every month. Usually, after reaching the service limit for about one year, it is enough to replace the new aluminum plate at the service station

aluminum air batteries have been developed for more than 0 years. They are mainly used by the US military and NASA in the United States. Aluminum air batteries have been operating on Mars for 13 years and are still in normal operation