کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1488688 992294 2013 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and electrochemical performance of sulfur-alumina cathode material for lithium-sulfur batteries
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Preparation and electrochemical performance of sulfur-alumina cathode material for lithium-sulfur batteries
چکیده انگلیسی

Nano-sized sulfur particles exhibiting good adhesion with conducting acetylene black and alumina composite materials were synthesized by means of an evaporated solvent and a concentrated crystallization method for use as the cathodes of lithium-sulfur batteries. The composites were characterized and examined by X-ray diffraction, environmental scanning electron microscopy and electrochemical methods, such as cyclic voltammetry, electrical impedance spectroscopy and charge–discharge tests. Micron-sized flaky alumina was employed as an adsorbent for the cathode material. The initial discharge capacity of the cathode with the added alumina was 1171 mAh g−1, and the remaining capacity was 585 mAh g−1 after 50 cycles at 0.25 mA cm−2. Compared with bare sulfur electrodes, the electrodes containing alumina showed an obviously superior cycle performance, confirming that alumina can contribute to reducing the dissolution of polysulfides into electrolytes during the sulfur charge–discharge process.

Figure optionsDownload as PowerPoint slideHighlights
► Micron-sized alumina was synthesized as adsorbent for lithium-sulfur batteries.
► Sulfur-alumina material was synthesized via crystallizing nucleation.
► The Al2O3 can provide surface area for the deposition of Li2S and Li2S2.
► The discharge capacity of the battery is improved during the first several cycles.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 48, Issue 6, June 2013, Pages 2079–2083
نویسندگان
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