کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5150193 | 1497901 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Conversion from Li2SO4 to Li2S@C on carbon paper matrix: A novel integrated cathode for lithium-sulfur batteries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Integral construction of lithium sulfide (Li2S) cathode is indispensable and vital for developing high-performance lithium-sulfur (Li-S) batteries. Herein we have demonstrated a facile strategy for fabricating free-standing carbon paper supported Li2S@C (P-Li2S@C) integrated cathode. The P-Li2S@C cathode is synthesized through simple pyrolysis of low-cost lithium sulfate (Li2SO4) and chitosan, and embedded in the double carbon matrixes with carbon paper support and outer CVD-carbon layer. Li2S nanoparticles are homogeneously dispersed in the above designed double carbon matrixes. The P-Li2S@C cathode exhibits an initial discharge capacity of 820 mAh gâ1 at 0.1 C and still maintains 430 mAh gâ1after 100 cycles, superior to the P-Li2S counterpart (480 mAh gâ1 at 0.1 C and 150 mAh gâ1 after 100 cycles). Our research verifies the effectiveness of double carbon modification on the Li2S, especially, the outer carbon coating not only improves the electrical conductivity of electrode, but also further prohibits the “shuttle effect” of polysulfides.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 331, 1 November 2016, Pages 475-480
Journal: Journal of Power Sources - Volume 331, 1 November 2016, Pages 475-480
نویسندگان
D.H. Wang, D. Xie, T. Yang, Y. Zhong, X.L. Wang, X.H. Xia, C.D. Gu, J.P. Tu,