Aluminum alloy anode material for aluminum/air battery as well as preparation and application of aluminum alloy anode material

Abstract

The invention discloses an aluminum alloy anode material for an aluminum / air battery and a preparation method of the aluminum alloy anode material. The aluminum alloy anode material mainly comprises several or more of the following components: 0.1 to 1.0 wt% of Mg, 0.01 to 0.9 wt% of Sn, 0.01 to 0.1 wt% of Ga, 0.01 to 0.5 wt% of Li, 0.01 to 0.5 wt% of B, 0.0 to 0.1 wt% of Na, 0.0 to 0.1 wt% of K,0.0 to 0.1 wt% of Zr, 0.0 to 2.0 wt% of RE, and the balance Al. The aluminum alloy anode material is excellent in corrosion resistance in alkaline electrolyte and good in electrochemical activity, thehydrogen evolution corrosion rate is smaller than or equal to 0.017 mL.cm<-2>.Min<-1>, the open-circuit potential is smaller than or equal to -1.92 V (vs.SCE), and the anode utilization rate is larger than or equal to 95%. The aluminum alloy anode material has the advantages of excellent comprehensive performance, simple preparation and the like.

Description

technical field [0001] The invention belongs to the field of metal / air fuel cells, and specifically relates to an aluminum alloy anode material for an aluminum / air cell and a preparation method thereof. Background technique [0002] The metal / air fuel cell is a new type of green battery with metal as the anode material and air as the cathode material. It has the advantages of low price, high energy density, and no pollution from the reaction product. Metal aluminum electrode potential is negative (alkaline medium -2.35Vvs.SHE), mass specific capacity is high (2.98Ah g -1 ), rich in resources, so aluminum / air batteries have good application prospects. [0003] Aluminum / air battery is a new type of high specific energy battery, the actual specific energy can be as high as 300~400Wh·kg -1 . However, metal aluminum has the following problems as an anode: a layer of oxide film on the aluminum surface inhibits electrochemical activity; aluminum will undergo severe hydrogen evol...

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Problems solved by technology

[0006] The first object of the present invention is to provide a kind of aluminum alloy anode material for aluminum / air batteries in view of the problems existing in the existing aluminum alloy anode materials

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