کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10567379 | 973252 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrophobic ionic liquids based on the 1-butyl-3-methylimidazolium cation for lithium/seawater batteries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Hydrophobic ionic liquids based on the 1-butyl-3-methylimidazolium cation for lithium/seawater batteries Hydrophobic ionic liquids based on the 1-butyl-3-methylimidazolium cation for lithium/seawater batteries](/preview/png/10567379.png)
چکیده انگلیسی
Two hydrophobic ionic liquids (room temperature molten salts) based on 1-butyl-3-methylimidazolium cation (BMI+), BMI+PF6â and BMI+Tf2Nâ, were used in developing a highly efficient lithium anode system for lithium/seawater batteries. The lithium anode system was composed of lithium metal/ionic liquid/Celgard membrane. Both BMI+PF6âand BMI+Tf2Nâ maintained high apparent anodic efficiency (up to 100%) under potentiostatic polarization (at +0.5Â V versus open-circuit potential (OCP)) in a 3% NaCl solution. Eventually, traces of water contaminated the ionic liquid and a bilayer film (LiH and LiOH) on the lithium surface was formed, decreasing the rate of lithium anodic reaction and hence the discharge current density. BMI+Tf2Nâ prevented traces of water from reaching the lithium metal surface longer than BMI+PF6â (60Â h versus 7Â h). However, BMI+PF6â was better than BMI+Tf2Nâ in keeping a constant current density (â¼0.2Â mAÂ cmâ2) before the traces of water contaminated the lithium surface due to the non-reactivity of BMI+PF6â with the lithium metal that kept the bare lithium surface. During the discharge process, BMI+PF6â and BMI+Tf2Nâ acted as ion transport media of Li+, Clâ, OHâ and H2O, but did not react with them because of the excellent chemical stability, high conductivity, and high hydrophobicity of these two ionic liquids. Both BMI+PF6â and BMI+Tf2Nâ gels were tentative approaches used to delay the traces of water coming in contact with the lithium surface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 144, Issue 1, 1 June 2005, Pages 191-196
Journal: Journal of Power Sources - Volume 144, Issue 1, 1 June 2005, Pages 191-196
نویسندگان
Yancheng Zhang, Mirna Urquidi-Macdonald,