应用动电位扫描,恒流放电等电化学方法研究含铟锌电极的电化学行为.用SEM和EDS观察放电后的Zn-In合金电极表面形貌,初步探讨了不同In含量的锌-铟合金电极在浓KOH溶液中电化学行为及其影响因素.结果表明,与纯锌电极相比,Zn-In合金的电极致钝电流增大,达到钝化的时间缩短,从而明显地提高了该电极的电化学活性.
The electrochemical behavior of zinc-indium alloy electrodes in 35%KOH solutions has been investigated by electrochemical methods including the potentiodynamic polarization and discharge measurements under constant current density.The results indicate that the anodic current density and passive current density increase after the indium addition.The discharge measurement shows that the addition of indium shortens the time to passive state for the Zn alloy compared to pure zinc at a large discharge conditions,that is the addition of indium may enhance the electrochemical activity of Zn alloy electrodes.It is found that the anodic dissolution of zinc-indium alloy electrodes in the concentrated KOH solution occurs along the certain crystalline face,and the surface roughness increases with the increasing of indium addition due to the anodic dissolution.
[1]Zhang G X.Corrosion and electrochemistry of zinc[M].New York:Plenum Publisher,1996.36.
[2]Wang Jian-ming(王建明),Qian Ya-dong(钱亚东),Zhang Li(张莉),et al.The questions and solve meth-ods of rechargeable zinc electrode[J].Battery Bimonth-ly,1999,29(2):76-80.
[3]Zhang Li(张莉),Wang Jian-ming(王建明),ZhangChun(张春),et al.The effect of additives on the elec-trochemical behavior of zinc electrode[J].Journal ofZhejiang University(Sciences Edition),2000,27(5):525-529.
[4]Ming Cai,Su-Moon Park.Spectroelectrochemical stud-ies on dissolution and passivation of zinc electrodes inalkaline solutions[J].J Electrochem Soc,1996,143(7):2125-2131.
[5]Ming Cai,Su-Moon Park.Oxidation of zinc in alkalinesolutions studied by electrochemical impedance spec-troscopy[J].J Electrochem Soc,1996,143(12):3895-3902.
[6]Mohammed A Amin.Passivity and passivity breakdownof a zinc electrode in aerated neutral sodium nitrate so-lutions[J].Electrochimica Acta,2005,50:1265-1274.
[7]Yair Ein-Eli,Mahmud Auinat.The behavior of zinc met-al in alkaline solution containing organic inhibitors[J].J Electrochem Soc,2003,150(12):A1614-A1622.
[8]Sun Y(孙烨),Zhang Bao-hong(张宝宏),Zhang Na(张娜).The newadvance of secondary alkaline zinc e-lectrode[J].Applied Science and Technology(in Chi-nese),2002,29(2):47-49.
[9]Fang Fei(方飞),ZhangWen-kui(张文魁),ShiYuan-yuan(施媛媛),et al.The study status and ad-vance of rechargeable zinc electrode[J].Zhejiang Hua-gong(in Chinese),2004,35(7):23-25.
[10]Hu Jing-wei(胡经纬),Liu Qin(刘琴),Cheng Jian-ping(程建平),et al.The study of howto improve theelectrochemical behavior of alkaline zinc electrode[J].J Wuhan Univ(Sciences Edition)(in Chinese),2001,4(2):137-141.
[11]Yang Hong-lin(杨红林).The apply of indium in al-kaline batteries[J].Journal of Guangxi UniversityWuzhou Branch(in Chinese),2002,3(12):22-23.
[12]HuangQi-ming(黄启明),LiWei-shan(李伟善),Zhang Shi-yong(张世涌),et al.Application of indiumin mercury-free alkaline Zn/MnO2batteries[J].Bat-tery Bimonthly(in Chinese),2001,31(5):233-235.
[13]Shi Jian-zhen(石建珍),Gao Cui-qin(高翠琴),ZhuJi-ling(朱纪凌),et al.The effects of metals on theelectrochemical behavior of Zn electrode[J].ChineseJournal of Power Sources(in Chinese),1997,21(1):3-7.
