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在30℃的4mol/LLiOH电解质溶液中,通过测量锂负极的自腐蚀析氢速率、极化曲线、电化学阻抗谱及电位-时间曲线,研究了Na作为合金元素及乙醇作为添加剂对锂负极的共同抑制自腐蚀析氢作用。结果表明:合金元素Na及乙醇对阴阳极反应都起到了抑制作用,但是单一添加合金元素Na或者乙醇缓蚀剂对锂负极的抑氢作用不大,而当共同添加合金元素Na及乙醇时对锂负极的抑氢效率提高明显,缓蚀率超过了80%。另外,单独添加合金元素Na时,锂负极的放电性能极不稳定,而溶液中添加乙醇后有利于提高锂负极的放电稳定性。XRD结果表明,钠与锂形成了比较理想的固溶体。
By measuring the hydrogen evolution rate, polarization curve, electrochemical impedance spectroscopy and potential-time curve of the lithium anode in 4mol / L LiOH electrolyte solution at 30 ℃, the commonality of Na as an alloying element and ethanol as an additive to the lithium anode Inhibit self-corrosion hydrogen evolution. The results showed that alloying elements such as Na and ethanol played an inhibitory role in both anode and cathode reaction. However, the addition of Na or ethanol as a single corrosion inhibitor had little effect on the hydrogen inhibition of lithium anode. However, when adding alloying elements Na and ethanol Inhibition of lithium hydrogen efficiency increased significantly, the corrosion inhibition rate of more than 80%. In addition, when the alloy element Na is added alone, the discharge performance of the lithium negative electrode is extremely unstable, and the addition of ethanol in the solution is favorable for improving the discharge stability of the lithium negative electrode. XRD results show that sodium and lithium form an ideal solid solution.