کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6601513 459348 2013 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
NaFe0.5Co0.5O2 as high energy and power positive electrode for Na-ion batteries
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
NaFe0.5Co0.5O2 as high energy and power positive electrode for Na-ion batteries
چکیده انگلیسی
O3-type NaFeO2 is a promising candidate as positive electrode materials for rechargeable Na batteries. However, its reversible range of sodium extraction is relatively narrow (x = ca. 0.4 in Na1 − xFeO2) because of the irreversible structural change, presumably associated with the iron migration into the adjacent tetrahedral sites in Na layers as we recently reported. Herein, we report that cobalt-substituted NaFeO2 demonstrates excellent electrode performance in a non-aqueous Na cell at room temperature. NaFe0.5Co0.5O2 delivers approximately 160 mAh g− 1 of reversible capacity with relatively good capacity retention and excellent rate-capability in a voltage range of 2.5-4.0 V, resulting in reversible formation of Na0.3Fe0.5Co0.5O2. The partial substitution of metal element for Fe in O3-type NaFeO2-based materials is proved to be the important strategy to suppress the irreversible phase transition, and thus improving the reversibility of sodium removal/insertion as the electrode materials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochemistry Communications - Volume 34, September 2013, Pages 60-63
نویسندگان
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