کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10141054 | 1646055 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
P2 manganese rich sodium layered oxides: Rational stoichiometries for enhanced performance
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: P2 manganese rich sodium layered oxides: Rational stoichiometries for enhanced performance P2 manganese rich sodium layered oxides: Rational stoichiometries for enhanced performance](/preview/png/10141054.png)
چکیده انگلیسی
Sodium layered oxide materials have shown excellent performance as cathodes in sodium ion batteries, due to their flexibility, versatility, and intrinsically fast Na ion structural diffusion which leads to enhanced rate capability. In this work, we have examined two strategies to mitigate Jahn-Teller distortion and boost the performance of these systems: substituting with electrochemically active (e.g. Fe) and doping with electrochemically inactive materials (e.g. Zn). Here, Mn-rich P2- phase Na2/3Mn0.8M0.1Mâ²0.1O2 (M, M'â¯=â¯Fe3+, Al3+, Zn2+, Cu2+, Ti4+) materials are synthesized from earth abundant precursors, via solid state-reaction, and characterized by X-ray diffraction, scanning electron microscopy and solid state NMR. The materials demonstrated a superior combination of capacity retention (74-94%) and specific charge at C/10 (â¼130-159â¯mAh gâ1) and 1C (â¼87-101â¯mAh gâ1) in the studied voltage window (2-4â¯V vs. Na+/Na). Thus, this work represents not only a new family of high-performance materials, but also validation for the rational design approaches used herein.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 401, 15 October 2018, Pages 117-125
Journal: Journal of Power Sources - Volume 401, 15 October 2018, Pages 117-125
نویسندگان
Elena Gonzalo, Nagore Ortiz-Vitoriano, Nicholas E. Drewett, Begoña Acebedo, Juan Miguel López del Amo, Francisco J. Bonilla, Teófilo Rojo,