کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1463467 | 989647 | 2013 | 6 صفحه PDF | دانلود رایگان |
Nanometer-sized 0.6Li2MnO3·0.4LiNi0.5Mn0.5O2 composite cathode powders are prepared directly by high-temperature flame spray pyrolysis. The precursor powders and the powders post-treated at 800 °C exhibit mixed-layered crystal structures comprising layered Li2MnO3 and layered LiNi0.5Mn0.5O2 phases. The discharge capacity of the precursor powders decreased from 193 mAh g−1 to 96 mAh g−1 by the 9th cycle, corresponding to a capacity retention of 49.7%. Post-treatment at 800 °C increases the capacity retention of the post-treated composite powders to 94.6% after 50 cycles, corresponding to a decrease in the discharge capacity from 225 to 213 mAh g−1. The post-treated composite powders that contain a high amount of the Li2MnO3 phase have a high initial discharge capacity and good cyclability.
Journal: Ceramics International - Volume 39, Issue 1, January 2013, Pages 331–336