کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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6470758 | 1424112 | 2017 | 6 صفحه PDF | دانلود رایگان |
NaFeF3 and NaMnF3 are promising cathode materials for sodium-ion batteries due to their low cost, low environmental impact and large theoretical capacity. NaCoF3 also has attracted attention as the high voltage cathode material for sodium-ion batteries. But, these ionic NaMF3 (M = Fe, Mn and Co) compounds have insulating character. To improve the lower electronic conductivity, two-step ball-milling with carbon was performed to obtain a uniform NaMF3 and carbon composite. The rechargeable capacity of NaFeF3 was 169 mAh gâ1, and its energy density was over 500 Wh kgâ1, which is the highest among the reported iron-based cathode materials for sodium-ion batteries. In addition, the experimental voltage for NaMnF3 was ca. 3.4 V, and the voltages for NaMF3 (M = Fe and Mn) calculated by the DFT method corresponded well with the experimental results for NaFeF3 and NaMnF3.
Journal: Electrochimica Acta - Volume 245, 10 August 2017, Pages 424-429