楊祖洪， 王 琪， 李 蘭
(重慶大學(xué) 化學(xué)化工學(xué)院， 重慶 400044)
摘 要: 用線性電位掃描、 Tafel極化曲線、 恒流放電、 交流阻抗、 失重法等方法研究AZ31鎂合金在MgSO4溶液中的電化學(xué)行為， 考察其作為電池負(fù)極材料的性能， 并研究十二烷基苯磺酸鈉對(duì)AZ31鎂合金的緩蝕性能。 結(jié)果表明: 負(fù)差效應(yīng)的存在極大降低AZ31鎂合金的電流效率； 未經(jīng)放電時(shí)， 合金自放電電流密度小， 但放電后， 自放電增強(qiáng)， 存儲(chǔ)能力降低。 十二烷基苯磺酸鈉能對(duì)AZ31合金起到緩蝕作用， 提高放電電流效率， 但會(huì)使續(xù)放電時(shí)出現(xiàn)電位滯后的現(xiàn)象。
關(guān)鍵字: 鎂電池； 負(fù)極材料； 負(fù)差效應(yīng)； 緩蝕劑； 十二烷基苯磺酸鈉
YANG Zu-hong, WANG Qi, LI Lan
（College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China）
Abstract: The electrochemical behavior of AZ31 magnesium alloy in MgSO4 solution was investigated by linear potential scan, Tafel polarization curve, constant-current discharge, electrochemical impedance spectroscopy and mass-loss measurements, in order to examine its performance as negative material of battery. The inhibiting ability of sodium dodecyl benzene sulfonate was also studied. The results indicate that the current efficiency of AZ31 alloy is low because of negative difference effect (NDE) and shelf-life decreases after discharge. Sodium dodecyl benzene sulfonate can inhibit the corrosion of alloy and increases the current efficiency of discharge, but it induces a potential lag at the beginning of sequel dischage.
Key words: magnesium battery; anodic material; negative difference effect; corrosion inhibitor; sodium dodecyl benzene sulfonate
