期刊
JOURNAL OF POWER SOURCES
卷 196, 期 10, 页码 4837-4841出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2011.01.060
关键词
Sodium iron fluoride; Perovskite; Sodium-ion battery; Liquid-phase synthesis; Nano-sized particles
资金
- New Energy and Industrial Technology Development Organization (NEDO)
Highly dispersed NaFeF3 particles were prepared at 280 degrees C by liquid-phase synthesis using high-boiling-point organic solution, and their electrochemical properties were studied by charge and discharge measurements. TEM observation clarified that the resultant NaFeF3 particles had uniform particle sizes of ca. 10-20, 100-200, and 500-600 nm, which could be controlled by the composition of the synthetic solution. The discharge capacities were higher for NaFeF3 that had smaller particle sizes, particularly at a rate of 0.1 C or higher, while the discharge capacities obtained at a rate of 0.01 C between 1.5 and 4.5 V were almost the same in the range 170-181 mAh g(-1) regardless of the particle size of NaFeF3. These results clearly indicate that the use of well-dispersed nano-sized NaFeF3 particles should effectively improve the rate performance of NaFeF3. (C) 2011 Elsevier B.V. All rights reserved.
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