The invention discloses a porous
zinc-
tin alloy negative
electrode material for a
zinc-air battery and a preparation method of the porous
zinc-
tin alloy negative
electrode material, belonging to the field of
new energy technology development. The porous zinc-
tin alloy negative material comprises a foamed
nickel substrate and a zinc-tin alloy plating layer, wherein the zinc-tin alloy plating layer is uniformly coated on the foamed
nickel substrate, tin and zinc in the zinc-tin alloy plating layer are uniformly distributed, and the
mole ratio of tin to zinc is (0.01-0.20):1. In the porous zinc-tin alloy negative
electrode material, foamed
nickel is taken as a negative electrode,
electroplating is carried out in an
electroplating liquid containing a complexing agent to obtain the porous zinc-tin alloy negative
electrode material, and the
electroplating liquid containing the complexing agent is selected from one of a
pyrophosphate system electroplating liquid, a gluconate
system electroplating liquid, a citrate
system electroplating liquid and a
tartaric acid system electroplating liquid. The porous zinc-tin alloy negative
electrode material has the advantages that the
material structure is reasonable in design, the preparation process is simple, and industrial application and production at a large scale are promoted.