کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5149498 | 1497884 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A comparative study on the solubility and stability of p-phenylenediamine-based organic redox couples for non-aqueous flow batteries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A comparative study on the solubility and stability of p-phenylenediamine-based organic redox couples for non-aqueous flow batteries A comparative study on the solubility and stability of p-phenylenediamine-based organic redox couples for non-aqueous flow batteries](/preview/png/5149498.png)
چکیده انگلیسی
A methyl-substituted p-phenylenediamine (PD), N,N,Nâ²,Nâ²-tetramethyl-p-phenylenediamine (TMPD), is examined as a positive redox couple with high energy density for non-aqueous Li-flow batteries. Methyl substitution affects the solubility of the redox couple, as the solubility is increased by a factor of ten, to a maximum solubility of 5.0Â M in 1.0 M lithium tetrafluoroborate-propylene carbonate supporting electrolyte due to elimination of the hydrogen bonding between the solute molecules. The methyl substitution also enhances the chemical stability of the cation radical and di-cation being generated from PD, as the redox center is shielded by the methyl groups. Furthermore, this organic redox couple demonstrate two-electron redox reactions at 3.2 and 3.8Â V (vs. Li/Li+); therefore, the volumetric capacity is twice higher compared to conventional one-electron involved redox couples. In a non-flowing Li/TMPD coin-cell, this organic redox couple demonstrates very stable cycleability as a positive redox couple for non-aqueous flow batteries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 348, 30 April 2017, Pages 264-269
Journal: Journal of Power Sources - Volume 348, 30 April 2017, Pages 264-269
نویسندگان
Hyun-seung Kim, Keon-Joon Lee, Young-Kyu Han, Ji Heon Ryu, Seung M. Oh,