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Effects of nonionic surfactant on the parasitic corrosion of lithium anode in lithium-water battery

机译:非离子表面活性剂对锂水电池锂阳极寄生腐蚀的影响

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摘要

The use of a nonionic surfactant, namely cocamide diethanol amine (CDA), as a parasitic inhibitor for lithium corrosion in 4.0 M LiOH aqueous solution has been evaluated in the 298-313 K temperature range. The efficiency of the CDA surfactant is evaluated by hydrogen evolution at OCP and potentiodynamic polarization measurements. Results show that the CDA surfactant is an appropriate inhibitor for parasitic corrosion. The CDA surfactant slows down the hydrogen evolution reaction during the immersion of lithium in 4.0 M LiOH aqueous solution. The efficiency of the CDA surfactant is promoted with growing surfactant concentration, reaching an extreme value (78.6%) at the critical micelle concentration (CMC). A Tafel polarization study reveals that the CDA surfactant acts as a cathodic-type inhibitor. Adsorption of the CDA surfactant on the lithium surface is unprompted and fits with Langmuir's isotherm. The associated activation energy and thermodynamic parameters are calculated to elaborate the mechanism of corrosion inhibition.
机译:在298-313K温度范围内,评估了使用非离子表面活性剂,即椰子二乙醇胺(CDA)作为锂腐蚀的寄生虫抑制剂。 CDA表面活性剂的效率通过OCP和电位动力学偏振测量的氢进化来评估。结果表明,CDA表面活性剂是寄生腐蚀的适当抑制剂。 CDA表面活性剂在浸入4.0M LiOH水溶液中浸没过程中的氢进化反应。 CDA表面活性剂的效率以生长的表面活性剂浓度促进,达到临界胶束浓度(CMC)的极值(78.6%)。 Tafel偏振化研究表明,CDA表面活性剂用作阴极型抑制剂。 CDA表面活性剂在锂表面上的吸附是无突破性的,并配合Langmuir的等温线。计算相关的激活能量和热力学参数以详细阐述腐蚀抑制的机制。

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  • 来源
    《RSC Advances》 |2016年第39期|共5页
  • 作者

    Deyab M. A.;

  • 作者单位

    EPRI Cairo Egypt;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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