کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7962621 | 1513987 | 2018 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Na2Mn3+0.3Mn4+2.7O6.85: A cathode with simultaneous cationic and anionic redox in Na-ion battery
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
فناوری سوخت
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چکیده انگلیسی
Here we report a high-capacity cathode, Na2Mn3+0.3Mn4+2.7O6.85, based on simultaneous cationic (Mn4+/Mn3+) and anionic (O2-/(O2)n-) redox process in Na-Mn-O system for Na-ion batteries (NIBs). An obvious voltage plateau at ~ 4.2â¯V vs. Na+/Na is reversibly presented during Na+ deinsertion/insertion demonstrated by XPS analysis of the participation of oxygen redox. This cathode delivers ~ 213â¯mAâ¯hâ¯g-1 in the voltage range of 1.5-4.5â¯V composed of two voltage plateaus from both cationic and anionic redox reaction. The two voltage plateaus exhibit the reversible phase transition upon Na+ insertion/deinsertion corresponding to a solid-solution region (high plateau) and a two-phase region (low plateau), respectively. The results indicate that anionic redox activity is available to develop high-capacity cathodes for NIBs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Storage Materials - Volume 14, September 2018, Pages 361-366
Journal: Energy Storage Materials - Volume 14, September 2018, Pages 361-366
نویسندگان
Qidi Wang, Wei Yang, Feiyu Kang, Baohua Li,