کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1298542 1498414 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical properties and Mössbauer effect of anti-fluorite type compound, Li5FeO4
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Electrochemical properties and Mössbauer effect of anti-fluorite type compound, Li5FeO4
چکیده انگلیسی

The anti-fluorite type materials, low and high temperature forms of Li5FeO4, were prepared and studied as a cathode for lithium secondary battery. The maximum amount of 1.2 equivalent lithium was de-intercalated from and reversibly intercalated to Li5FeO4, which corresponds to the capacity of 200 mA h/g in Li/Li5FeO4 cell (4 V–2 V). In the first charge, anti-fluorite type Li5FeO4 changed to amorphous-like phase which concerned the following discharge and charge processes. In an initial few cycles, the discharge capacity was lower than the charged capacity and the efficiency became 100% after the fifth cycle. The Mössbauer effect measurement showed that the amounts of oxidized iron such as the Fe4+ state formed by the charging process did not coincide with that of the charge transferred in the Li/Li5FeO4 cell. The oxidation in oxide ion side was suggested.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 176, Issues 37–38, 30 November 2005, Pages 2777–2782
نویسندگان
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