FeO0.7F1.3/C Nanocomposite as a High‐Capacity Cathode Material for Sodium‐Ion Batteries |
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| Authors: | Yong‐Ning Zhou Mahsa Sina Nathalie Pereira Xiqian Yu Glenn G Amatucci Xiao‐Qing Yang Frederic Cosandey Kyung‐Wan Nam |
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| Affiliation: | 1. Department of Chemistry, Brookhaven National Laboratory, Upton, New York, USA;2. Materials Science and Engineering, Rutgers University, Piscataway, New Jersey, USA;3. Energy Storage Research Group (ESRG), Rutgers University, North Brunswick, New Jersey, USA;4. Department of Energy and Materials Engineering, Dongguk University‐Seoul, Seoul, Republic of Korea |
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| Abstract: | Searching high capacity cathode materials is one of the most important fields of the research and development of sodium‐ion batteries (SIBs). Here, we report a FeO0.7F1.3/C nanocomposite synthesized via a solution process as a new cathode material for SIBs. This material exhibits a high initial discharge capacity of 496 mAh g?1 in a sodium cell at 50 °C. From the 3rd to 50th cycle, the capacity fading is only 0.14% per cycle (from 388 mAh g?1 at 3rd the cycle to 360 mAh g?1 at the 50th cycle), demonstrating superior cyclability. A high energy density of 650 Wh kg?1 is obtained at the material level. The reaction mechanism studies of FeO0.7F1.3/C with sodium show a hybridized mechanism of both intercalation and conversion reaction. |
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| Keywords: | sodium ion batteries electrode material energy storage reaction mechanism |
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