China has developed a kilowatt-class aluminum air battery using graphene, with an energy density of up to 510Wh/Kg.

The reporter learned from the Ningbo Institute of Materials of the Chinese Academy of Sciences that the research team of the institute recently developed an aluminum air battery power generation system based on graphene air cathode. The energy density of the battery system is up to 510Wh/Kg (watt hour per kilogram), capacity is 20 kWh, and output power 1000 watts. The actual demonstration shows that the battery system can simultaneously supply power to a TV set, a computer, an electric fan and 10 60-watt lighting bulbs, which preliminarily verified the power generation capability of the aluminum air battery system.

Graphene is a "fighter" in materials. China has used graphene to develop kilowatt-class aluminum air batteries, which is a major breakthrough in the field of new energy and new materials.

Yejian Xue, senior engineer of the Ningbo Institute of Industrial Technology of the Chinese Academy of Sciences, told the reporter that the core material of the aluminum air battery is a cathode catalyst doped with graphene. The product uses an aluminum plate as an anode, and an air cathode inserted into a graphene-based composite catalyst is placed in a container containing an electrolyte, and aluminum reacts with air to generate electric energy.

This aluminum air battery currently has 22 national patents, which can be used in electric vehicles, communication base stations and other fields. Because the graphene-based composite oxide is used as a catalyst, the dispersibility of the material is good, the internal consumption of the battery itself can be reduced, and the specific energy of the aluminum air battery is several times higher than that of the ordinary lithium battery, which greatly improves the endurance.

If used in a new source car, it can reduce the battery volume, make the body light, and greatly improve the cruising range; if used on mobile phone charging treasure, it can greatly increase the output power; and if the communication base station uses this battery, the advantage is also obvious. At present, China's communication base station uses lead-acid batteries, which are changed every two or three years. It is very difficult for some remote areas to update, but the life of aluminum air batteries is 15~20 years, which can solve this problem to a large extent.

The reporter also learned that in the future, aluminum air batteries can also be used on lanterns and beacon lights. Because the seafarers encounter emergency power shortages, they can pick up the sea water and connect the wires to generate electricity. For some friends loving travelling, it can also make the journey safer and more convenient.

According to Dr. Zhaoping Liu, a researcher at the Key Laboratory of Graphene Application Research in Zhejiang Province, the experimental pilot production line for aluminum air battery cathodes with graphene-based composite oxides has been completed, and it can be mass-produced in the future.

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