期刊
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
卷 27, 期 2, 页码 624-629出版社
SPRINGER
DOI: 10.1007/s11665-018-3167-3
关键词
cathode material; charge-discharge performance; FeF3/C; high-temperature performance; lithium-ion battery
资金
- National Natural Science Foundation of China [U1202272]
Iron trifluoride has been studied as a cathode material due to its cost-effectiveness, low toxicity, and high theoretical capacities of 712 mA h g(-1). However, FeF3 has serious shortcomings of poor electronic conductivity and a slow diffusion rate of lithium ions, leading to a lower reversible specific capacity. In this work, FeF3/C nanocomposite has been synthesized successfully via a high-energy ball-milling method, and acetylene black is used as the conductive agent to improve the conductivity of FeF3. The FeF3/C nanocomposite shows a high initial discharge capacity of 346.25 and 161.58 mA h g(-1) after 40th cycle at 50 mA g(-1). It exhibits good cycle performance and rate performance. The high-temperature discharge capacities decreased with increase in the temperature. The initial high-temperature discharge capacities are found to be 254.17, 300.01, 281.25 and 125.16, and 216.875, 156, 141.67, 150, and 64.98 mA h g(-1) at 20th cycles at the 40, 50, 60, and 70 A degrees C, respectively.
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