Self-assembled monolayers for electrochemical migration protection of low-temperature sintered nano-Ag paste  

作　　者：Shan Wan Hong Wang Jin-Hang Liu Bo-Kai Liao Xing-Peng Guo 

机构地区：[1]School of Chemistry and Chemical Engineering,Guangzhou Key Laboratory for Clean Energy and Materials,Guangzhou University,Guangzhou 510006,China [2]School of Chemistry and Chemical Engineering,Jiangxi Province Engineering Research Center of Ecological Chemical Industry,Jiujiang University,Jiujiang 332005,China [3]School of Chemistry and Chemical Engineering,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Rare Metals》2022年第4期1239-1244,共6页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Nos. 52001080 and 51971067);the Science and Technology Research Project of Guangzhou (Nos. 202102020467 and 202002010007);the Platform Research Capability Enhancement Project of Guangzhou University (No. 69-620939);Guangzhou University’s 2020 Training Program for Talent (No. 69-62091109);Provincial Innovation Training Program for College Students of Guangzhou University (No. S202011078017)

摘　　要：The protective self-assembled monolayers(SAMs)were fabricated on the surface of low-temperature sintered nano-Ag paste electrode in the sodium mercaptobenzothiazole(MBT-Na)solution at room temperature.Electrochemical migration(ECM)behavior was investigated using waterdrop test,andthemeantimeto failure was employed as a parameter to evaluate ECM probability.Some electrochemical meth-ods,including electrochemical impedance,potentiodynamic polarization curves,localized electrochemical impedance spectroscopy and scanning Kelvin probe,have been carried out to clarify the formation process of SAMs.Results indi-cated that growth of tree-like silver dendrites after ECM tests resulted in the short circuit between twin electrodes.The SAMs-coated electrode can reduce the rate of anodic disso-lution and thus retard the growth of dendrite.The ECM inhibition efflciency increased with the concentration of MBT-Na rising.And the optimum self-assembled time was 60 min.A higher applied bias resultedin a shorter failuretime for ECM.And relevant mechanisms have been proposed.

关 键 词：ELECTROCHEMICAL PASTE ELECTRODE 

分 类 号：O646.5[理学—物理化学]