Aluminum based anodes and process for preparing the same

Abstract

Disclosed is a method for preparing an aluminum-based anode, including at least one alloying element, prepared using solid solution heat treatment, in addition to plastic deformation, artificial aging, or a combination thereof.

1 . A method for preparing aluminum-based anodes, the method comprising:
 performing a solid solution heat treatment on an aluminum-based alloy, wherein the aluminum-based alloy comprises at least one alloying element selected from Mg, Ga, Ge, Ag or Si and the solid solution heat treatment results in a metastable supersaturated solid solution phase; and   performing on the aluminum-based alloy a treatment of artificial aging, plastic deformation or a combination thereof to decompose the metastable supersaturated solid solution phase and produce an aluminum-based anode.   
     
     
         2 . The method according to  claim 1 , wherein the metastable supersaturated solid solution phase is decomposed by plastic deformation. 
     
     
         3 . The method according to  claim 1 , wherein the at least one alloying element is magnesium. 
     
     
         4 . The method according to  claim 3 , wherein the magnesium is present in an amount of 0.5 to 10% w/w. 
     
     
         5 . The method according to  claim 3 , wherein magnesium is present in an amount of 2 to 4% w/w. 
     
     
         6 . An aluminum-based anode prepared according to a method comprising:
 performing a solid solution heat treatment on an aluminum-based alloy, wherein the aluminum-based alloy comprises at least one alloying element selected from Mg, Ga, Ge, Ag or Si and the solid solution heat treatment results in a metastable supersaturated solid solution phase; and   performing on the aluminum-based alloy a treatment of artificial aging, plastic deformation or a combination thereof to decompose the metastable supersaturated solid solution phase and produce an aluminum-based anode.   
     
     
         7 . The aluminum-based anode according to  claim 6 , wherein the metastable supersaturated solid solution phase is decomposed by plastic deformation 
     
     
         8 . The aluminum-based anode according to  claim 6 , wherein the at least one alloying element is magnesium. 
     
     
         9 . The aluminum based anode according to  claim 8 , wherein the magnesium is present in an amount of 0.5 to 10% w/w. 
     
     
         10 . The aluminum based anode according to  claim 8 , wherein magnesium is present in an amount of 2 to 4% w/w. 
     
     
         11 . An aluminum based anode, comprising Mg as the alloying element, having a coulombic efficiency of at least 85%, at a temperature in the range of 40-50° C.