کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6578731 1422929 2018 33 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Long-life and high-areal-capacity lithium-sulfur batteries realized by a honeycomb-like N, P dual-doped carbon modified separator
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Long-life and high-areal-capacity lithium-sulfur batteries realized by a honeycomb-like N, P dual-doped carbon modified separator
چکیده انگلیسی
Lithium-sulfur (Li-S) batteries have caught tremendous attention as next-generation energy storage systems because of their high theoretical energy density. Nevertheless, the inferior cycle stability of Li-S batteries, mainly caused by the polysulfides migration, constrains their practical application. Herein, a honeycomb-like N, P dual-doped carbon (HNPC) modified separator is adopted to restrain the shuttle effect. Particularly, the comparative experiments to systematically explore the reaction mechanisms between HNPC and polysulfides are performed. The results reveal that HNPC coated separator can effectively immobilize the polysulfides via forming strong N-Li and P-S bonds without sacrificing lithium ions diffusion. As results, the Li-S battery employing the HNPC coated separator exhibits the high initial specific capacity of 1387 mA h g−1 and can retain good capacity of 930 mA h g−1 after 200 cycles at 0.2C, as well as outstanding long-term cycle durability even at high current density of 1.0C with only 0.06% capacity attenuation per cycle for over 900cycles. Moreover, stable and high areal capacity (>3 mA h cm−2) is also achieved under high sulfur areal loading conditions (4 mg cm−2).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 349, 1 October 2018, Pages 327-337
نویسندگان
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