阿拉伯糖对铝-空气电池中铝合金电极电化学活性及腐蚀性能的影响

Effects of Arabinose on Electrochemical Activity and Corrosion Resistance of Aluminum Alloy Anode in Aluminum-Air Battery

为了获得既高效又不降低电极电化学活性的新型铝-空气电池用电解液缓蚀剂,针对商品化的铝-空气电池用铝合金电极材料和空气电极,通过电化学分析并结合腐蚀产物的结构及形貌分析,研究了阿拉伯糖对铝合金电极和空气电极的电化学活性以及铝合金电极腐蚀行为的影响。结果表明:在碱性电解液中加入阿拉伯糖,有利于铝合金电极的活性溶解,提高铝合金电极的电化学活性,同时不影响空气电极的电化学活性;阿拉伯糖的加入可有效降低放电过程中铝合金电极的腐蚀,大幅度提高铝合金电极的利用率,其浓度应控制在(0.1~0.5)×10-3mol/L。

The electrochemical analysis combined with obsen ation of structure and morphology of corrosion products was used to study the influences of arabinose on electrochemical activity of aluminum alloy anode and air cathode,as well as the corrosion resistance of aluminum alloy anode.Results showed that adding arabinose in alkaline electrolyte was beneficient to active-dissolution and electrochemical activity of aluminum alloy,without bad effects on the electrochemical activity of air cathode.In general,the arabinose could effectively reduce corrosion of aluminum alloy anode,and improve substantially the ulilization ratio of aluminum alloy anode,concentrations of which should be controlled in a range of(0.1~0.5)×10^(-3) mol/L.