A Novel Aluminium–Air Secondary Battery with Long-Term Stability

A metal-air secondary cell with the abundant metal aluminium has been assembled by placing the aluminium ion conductor Al₂(WO₄)₃ both on top of the aluminium anode and underneath the air cathode.  It was possible to enhance the cell capacity and suppress the yield of by-products_, by modifying the cell structure. When aqueous NaCl was used as an electrolyte, byproducts such as Al(OH)₃ or Al₂O₃were not detected.  We suggested that this is one of the reasons for obtaining secondary battery with Aluminium -Air cell.  When the condition was optimized, the battery functioned for approximately one month.  We found that the impedance was increased after 1 week of  charge-discharge reaction.  Moreover, by combining the air cathode active material and the solid electrolyte, we were able to achieve a higher cell capacity. This provides a snapshot of future Al-air secondary batteries. 

Figure  A Schematic Figure of Aluminium-Air Secondary Battery