کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9760479 | 1498049 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Self-discharge of lithium-sulfur cells using stainless-steel current-collectors
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
The self-discharge behaviour of Li-S cell, is investigated through changes in the open-circuit voltage (OCV) and discharge capacity with storage time. A fresh Li-S cell experiences 72% sulfur utilization during the first discharge, as based on the theoretical capacity for the formation of Li2S. After 30 days of storage, the OCV has fallen from 2.48 to 2.16 V and the discharge capacity has decreased from 1206 to 924 mAh gâ1 (based on sulfur). Analysis of the self-discharged sample by a variety of techniques shows the formation of lithium polysulfides, such as Li2Sn (n ⥠1) from the reaction of lithium and sulfur, which is related to the corrosion of the stainless current-collector. Stainless steel is not the most appropriate current-collector material for Li-S cells. The extent of self-discharge can be decreased by using a gold-coated current-collector that offers protection against corrosion.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 140, Issue 2, 2 February 2005, Pages 365-369
Journal: Journal of Power Sources - Volume 140, Issue 2, 2 February 2005, Pages 365-369
نویسندگان
H.S. Ryu, H.J. Ahn, K.W. Kim, J.H. Ahn, J.Y. Lee, E.J. Cairns,