کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7737706 1497981 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparative study of electrolyte additives using electrochemical impedance spectroscopy on symmetric cells
ترجمه فارسی عنوان
بررسی مقایسه ای از افزودنی های الکترولیت با استفاده از طیف سنجی امپدانس الکتروشیمیایی بر روی سلول های متقارن
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی
The effect of various electrolyte additives and additive combinations added to a 1 M LiPF6 EC:EMC electrolyte on the positive and negative electrodes surface of 1 year old wound LiCoO2/graphite cells and Li[Ni0.4Mn0.4Co0.2])O2/graphite cells was studied using electrochemical impedance spectroscopy (EIS) on symmetric cells. The additives tested were: vinylene carbonate (VC), trimethoxyboroxine (TMOBX), fluoroethylene carbonate (FEC), lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), and H2O alone or in combination. In general, compared to control electrolyte, the additives tested reduced the impedance of the positive electrode and increased the impedance of the negative electrode with the exception of LiTFSI in Li[Ni0.4Mn0.4Co0.2]O2/graphite wound cells. Higher charge voltage led to higher positive electrode impedance, with the exception of 2%VC + 2% FEC, and 2% LiTFSI. In some cases, some additives when mixed with another controlled the formation of the SEI at one electrode, and shared the formation of the SEI at one electrode when mixed with a different additive.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 251, 1 April 2014, Pages 187-194
نویسندگان
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