Designofhighperformancealuminum-airbatterybasedoncheapnon-preciousmetalcathodes

Abstract

With the rapid development of areas such as mobile electronic devices and electric vehicles, environmental problems and energy problems have become increasingly prominent. Therefore, it is particularly important to develop green, safe, efficient, cheap, sustainable energy storage and large-scale application of energy storage devices. Aluminum-air battery is a device that converts the chemical energy of anode aluminum directly into electric energy through electrochemical reaction. The theoretical voltage of aluminum-air battery is high (2.75 V), large specific capacity (2.98 Ah/g), high specific energy (8.1 Wh/g), and metal aluminum is a high strength energy carrier, has the advantages of rich resources, low price, environment friendly, perfectly matching the current situation of power supply requirements. However, the existing aluminum-air batteries face the economic problem of high cost, due to the slow oxygen reduction reaction dynamics of the cathode and the use of the expensive precious metal Pt/C as a catalyst. In order to reduce the cost of aluminum-air batteries, this paper plans to use the cheap non-precious metal nano carbon materials as the cathode catalyst, and flexibly use the structural design to construct the structure of the aluminum-air battery with double cathodes, which effectively increases the cathode reaction area. In this paper, the discharge performance was studied by experimental method, and its peak power is 1.42 times that of the traditional single cathode battery, which has good catalytic performance and stability, and shows that the non-precious metal double-cathode structure battery is both practical and economical.