Synergistic effects of transition metal substitution in conversion electrodes for lithium-ion batteries
作者： María J Aragón , Bernardo León , Thelma Serrano , Carlos Pérez Vicente , José L Tirado
DOI: 10.1039/C0JM03880F
关键词:
摘要: Different solid solutions in the FexCo1−xC2O4·2H2O system have been prepared form of nanoribbons by a reverse micelles method. The orthorhombic crystallographic structure differs from monoclinic massive products FeC2O4·2H2O and CoC2O4·2H2O. dehydration process is studied thermal analysis to prepare anhydrous solution oxysalts, which nanoribbon-shaped particles are preserved porous developed. Anhydrous mixed oxalates used for first time as high-capacity lithium storage materials with improved rate performance, display synergistic effects compared end members. Fe0.75Co0.25C2O4 displays reversible capacity ca. 600 mA h g−1 at 5C very good retention after 75 cycles hybrid mechanism. solids faradaic capacities due novel conversion reaction that produces nanodispersed transition metals, responsible high energy density, capacitive response leads power densities Li-ion batteries. low temperature synthesis these makes them an inexpensive option this purpose.
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